DE1226164B - Circuit arrangement for telecommunication switching systems with markers - Google Patents

Description

Circuit arrangement for telecommunication systems with markers The invention relates to a circuit arrangement for telecommunications switching systems, in particular telephone switching systems with markers and switching devices, the switching switching elements arranged in several switching switching stages exist and which are set by the markers.

There are already known among these circuit arrangements those in which multi-stage switching networks are used as switching devices. It is also known to make connections via these switching matrices through central markers to manufacture. As a rule, a marker is provided for a switching matrix. work several markers in parallel with one and the same coupling matrix, then the Securing clear marking processes in the coupling matrix by means of suitable circuitry Action ensures that there is never more than a single marker at the same time Can mark through-connection for a connection in the switching matrix. But just be here considered the case that only a single marker with a switching matrix cooperates.

Such a central control, as it is carried out by a marker, has the great advantage that connections can be established with regard to all through-connection options available in a switching system. Furthermore, the lines corresponding to different directions line bundles can be mixed arbitrarily at the outputs of selectors or couplers, d. This means that there is no need for the lines to be spatially assigned according to their bundle affiliation, which allows a great deal of freedom in the connection of outgoing lines to the outputs of dialers or couplers. FER ner the traffic carrying capacity of a Verinittlungsanlage by such a mixture as is well known to significantly increase because the traffic loads of different each other ancillary elements (z. B. voters the same selection stage) can be with each other strongly balanced.

The advantages of the central control are bought with a special expenditure on switching means for the control. These switching means include the cabling required for path finding and marking circuits between the marker and the coupling field. For example, each per output, a circuit for route search and a circuit for marking or together depending on a circuit for both functions is required. This effort is considerable when you consider that markers and switching fields are spatially extensive. Switching networks of larger switching systems can only be used in several assemblies, e.g. B. several frames, expediently, and they do not form a structural unit with the marker. Such line-specific (e.g. outgoing lines at the exits of a switching network) cabling between spatially separated devices is very complex, not only with regard to the production, but in particular also the maintenance and maintenance of a system.

Therefore, a circuit arrangement with couplers in a plurality of switching stages has been proposed, in each of which a adjustment set provided for each coupler in each switching stage. In a first coupling stage, only one coupler and one setting kit are provided; In a second coupling stage, on the other hand, several couplers and setting sets are possible. The setting sets are connected to the marker via a ring cable that is common to all of them, i. This means that the individual wires of this cable lead parallel to all setting sets of the couplers. Markings on these wires have different meanings with regard to the different setting sets. Their uniqueness is ensured by the fact that when marking certain trunk groups according to a selected destination, the switching stage to which the coupler and the setting set belong to it and any previous through-connection in the train of one and the same connection are taken into account. However, interconnections over several coupling stages require that as many marking processes have to take place as there are coupling stages.

The object of the invention is now to reduce the cost of lines between marker and switching fields to control the switching fields the Restrict markers and make all connections in a single switching process to manufacture. The solution to this problem is that the switching switching elements in some switching switching stages of the switching switching devices in groups are summarized, which extend to the same switching switching stages and to which individual setting sets are assigned that the setting sets. in not Common parts of the switching devices combined in groups Have intervention and at the same time working to determine the presence of free lines and that they have a common marker under the lines selected with each wired groups of switching switching elements with the help of these assigned Setting sets selects a group in which at least one free of the selected Lines, and both the setting sets assigned to all other groups triggers as well as a selection among the selected ones connected to the selected group Lines initiates.

The invention thus enables, firstly, a route search over the entire switching network and over all outputs of the same that come into question for a connection under mutually independent, parallel operation of several setting sets, secondly a single group of switching switching elements due to the presence of at least one free of the selected and to select lines connected to this group and, thirdly, to use the setting set assigned to this group of switching switching elements to determine a free one of the selected lines. In this case, path search processes that work independently and simultaneously intervene in a common part of the switching switching devices in which they can even overlap. The required uniqueness is then brought about by a selection, which also refers to the setting sets themselves, on the part of the marker among the groups of switching switching elements, so that in this group a free of the selected lines is determined and a connection to this particular line is clearly switched through can be marked.

A particular advantage of the invention lies in the time savings that results from the simultaneous working of the setting sets and they despite the Engagement of the plurality of setting sets in common parts of the switching switching devices by the selection of one of the groups by the marker to a uniqueness of the Marking a connection to be switched through helps.

A further advantage of the invention arises from the fact that before selecting and marking a single output of the switching switching devices, i. H. a free outgoing line, a preselection is made among the groups of switching switching elements, and is that the selection of a free line is handled via individual line circuits that run only between groups of switching switching elements and their individually assigned setting sets, so that these line-specific circuits only within one device, e.g. B. a frame that structurally summarizes the setting set and the group of switching switching elements. According to a further embodiment of the invention, the marker marks a connection to the selected line with the aid of the setting set across all switching switching stages of the switching switching devices. This results in a further advantage that the marking of a connection within the switching switching devices can take place via circuits between the setting sets and the marker, which are only provided jointly for all setting sets.

In the F i g. 1 to 6 and 8 show an exemplary embodiment of the invention, to which, however, the same is in no way restricted. The F i g. 7 shows, as an application for such an embodiment, the plan of a small part of a larger telephone network.

In Fig. 7 shows the plan of a telephone network with a star-shaped basic concept and superimposed mesh network. A center A, located in a star center, is connected to wider centers B and C via a star network. Telephone exchanges are located at the points mentioned. The lines connecting them each represent trunk groups. Furthermore, a location X is shown where there is also a telephone exchange. The systems located at locations A, B and C , in future only referred to as control centers A, B and C , can be reached from the system located at location X, in the future called control center X, via a total of three trunk groups Bdl, Bd2, Bd3. From the location of the center X, the center A can be reached via the trunk groups Bd 1 and Bd 3 in such a way that only when everyone is busy. Lines of the line bundle Lines of the trunk group BD3 are occupied, via which detour connections via the central office C, which is used as a transit office in this case, and via which the trunk group connecting this directly to the central office A can be established.

In the same way, the centers B and C via lines in each case one direct are now - trunk group or Bd2 Bd3 from the central X forth achievable. If the trunk group Bd2 is busy, the control center B can also be reached via the trunk group Bdl in a detour via the control center A. When the trunk group Bd3 is busy, the control center C can also be reached from the control center X via the trunk group Bdl in a detour via the control center A.

From the foregoing it can be seen that the line bundle BDL Bd2 and Bd3 are for the control of the Central B and C from the center X forth in a certain rank order by which the overflow in Besetztsein en INTR-all a trunk group is determined. The term "overflow" for switching technology is well known in the specialist literature. The order of priority of the trunk groups is with regard to the center B: Bd2, Bdl. The sequence of the line bundles in relation to the control center C: Bd3, Bdl. Centers B and C will be referred to as target points 1 and 2 from now on.

The lines of the line bundle Bd 1, Bd 2 and Bd 3 are connected to the outputs of the FIG. 1 shown coupling matrix KF connected. The in F i g. 1 in an overview and in the F i g. The switching system shown in detail in FIGS. 2 to 6 and 8 takes into account, among other things, the order of precedence in which the trunk groups are controlled, as explained above and determined by the respective destination point. In Fig. 1 shows that per se known counting pulse generators Zig are provided, which are required in large numbers for a connection. If a counting pulse generator is initially occupied as it arrives, a free memory Sp is switched on via a search selector Sivl to receive the selection information. After the election information has been recorded, a corrector Um is requested. One or more correctors Um can be provided. Each one is present together for a plurality of memory, and each is connected to a respective ZentralmarkiererZm. The corrector Um receives the selection information from the SpeicherSp and determines the information about the tariff, which it transmits back to the counting pulse generator in a known manner, and the setting information which it transmits to the central marker Zin.

The coupling network is built up in four coupling stages, each with single-stage relay couplers (KM to K4 n6 in FIG. 2). The in F i g. 2 shows that the couplers of the first and second coupling stage on the one hand and the third and fourth coupling stage on the other hand are combined in groups. Only within such a coupling group are all couplers of the third (or first) coupling stage connected to one another by intermediate lines with all couplers of the fourth (or second) coupling stage. Like F i g. 1 shows, each coupling group comprising the third and fourth coupling stage - also referred to as output coupling group (AKG1 to AKG n) - is assigned a setting set (ES 1 to ESn).

On the basis of the setting information received from the corrector, the central marker Zm causes all those setting records to be connected to it, to whose assigned output coupling groups lines are connected which each come into question somehow for a required connection establishment. From Zentralmarkierer is first determined, in which bundles of all these aforementioned lines at least one respective line is idle, which is accessible via the switching network KF at the same time a filled Zählimpulsgeber Zig forth. For this purpose, route search potential is given by the corrector via the relevant counting pulse generator to a route search network of the switching network KF. Trunk group, in which at least one each outgoing free and accessible via the switching network KF line determined are available for connecting. The central marker then selects from the switched-on setting sets the one (eg ES1) to whose assigned output coupling group (eg AKG1) the first available bundle according to the previously explained order of preference determined by the target point is connected. At the same time, the last-mentioned bundle is determined by the central marker Zm in the one output coupling group. A free accessible line (line) is then selected from this in the setting set. Then a path in the switching network for switching through the connection via this line is selected and the connection is switched through. Then all central elements from the search selector to the setting block, eg ES1, switch off again and return to their rest position.

The search selectors Swl and Sw2 shown symbolically as rotary selectors can also be used as couplers, e.g. B. relay couplers, which are known to have a much shorter switching time.

Using the description of FIG. 7 (see above), the mode of operation of the one shown in FIGS. 2 to 6 described in more detail switching elements shown.

The F i g. FIG. 2 shows the grouping of the switching matrix, which has already been taken from FIG. 1 is hinted at. The switching matrix in FIG. 1 designated by KF, has single-stage couplers K111 to K4n6. These are combined into coupling groups in a first and second coupling stage on the one hand and in a third and fourth coupling stage on the other hand. The couplers K 111 to K 110 and K211 to K210 thus form a coupling group with the intervening couplers (not shown). It is the same with the KopplernK311, K310, K411, K410, etc. Within each coupling group all couplers are of a switching stage with all couplers of the other switching stage via at least one each, possibly ever more - so parallel, each one coupler, each with a only other coupler running - intermediate lines interconnected. The intermediate lines run from one switching stage to the other (KA, KB, KC, KD) through intermediate line fields Z1, Z2, Z3. These can also contain jumper distributors on which the link wiring can be changed in detail; however, the division into coupling groups remains.

The couplers of the second and third coupling stage are connected to one another via intermediate lines in the intermediate line field Z2 in such a way that the couplers of all input coupling groups (first and second coupling stages KA, KB) are connected to the couplers of all output coupling groups (AKG 1 to A KG n in FIG. 1; third and fourth coupling stage KC, KD) are connected. The number of input coupling groups and that of output coupling groups is similarly indicated with n; however, it can also be of different sizes. The output coupling groups each contain ten couplers in the third coupling stage with six outputs to the fourth coupling stage and in this each six couplers with ten inputs from the third coupling stage. Each coupler of the fourth switching stage contains ten Ausänge from the switching matrix, so that, therefore, an output coupler array comprises sixty each of these outputs. These numbers are not essential and are only used to describe the exemplary embodiment. So z. B. on the basis of traffic theoretical considerations, the number of inputs of a coupler of the fourth switching stage can be selected to be greater than the number of its outputs, whereby the accessibility of the outputs of a switching network can be increased.

The couplers are designed as relay couplers and, in a known manner, each have a cross field designed according to its inputs and outputs; each input line forms, with each output line of the coupler each have a coupling point at which a coupling relay lies, is connected together via the contacts of the input concerned with the respective output. Each intermediate line contains some signal wires, e.g. B. speech wires, also a response wire and a holding wire for the coupling relay and a path search wire. In Fig. 3 is shown by all switching stages K, 4 to KD and all intermediate line fields per a coupling point or, depending on an intermediate line. In Fig. 3 on the left, the indication Zig indicates that the connections to the couplers of the first coupling stage K, 4 are individually connected to the counting pulse generator Zig. In Fig. 3 above is a signal wire, z. B. speech artery shown. To indicate that two speech wires are provided, the coupling contacts are labeled a1 / 2, b1 / 2, c1 / 2 and d1 / 2 . The multiple characters next to the coupling contacts indicate that each input and output of the coupling network or each intermediate line travels in a known manner to more than one coupling point.

Under the signal vein is shown in FIG . 3 shows a holding wire as a continuous circuit. This includes at the coupling points each have a holding coil (I) of the coupling point assigned coupling relay, and a relay holding contact own. In the intermediate line fields there are windings of intermediate line relays L 1, L 211, L 3, which characterize the state of their intermediate line (whether free or occupied) by their state of excitation (activated or de-energized). In the intermediate line field Z 2, the holding wire is connected to ground potential on one side via the winding of the intermediate line relay. The continuing branch of the holding wire can be connected to ground potential via contact L211 of the link relay L211. The holding wire is galvanically separated here and only functionally connected by means of a link relay L211.

Like the speech artery, the holding wire has the multiple characters, which have the same meaning here as in the speech artery. The holding wire leads on the input side via switching means into a counting pulse generator via which z. B. the release of a connection can be brought about. On the output side, each holding a respective wire travels over each output d. H. each outgoing line connected to this, individual holding relay H, via which the release of a connection can be forwarded. If a single line can be reached via several outputs from the coupling matrix, a holding relay H is assigned to each output.

Below the holding header is shown in FIG . 3 shows a response line. This includes in each crosspoint with the switched j e a rectifier Gl 1, Gl 2, Gl 3, 4 eq Ansprechwicklung in series (II) of the coupling relays at this crosspoint. The coupling relays are shown in FIG . 3 labeled A, B, C and D only.

The rectifiers Gll, G12, G13 G14 have a different forward direction in the coupling stages KA and KB than in the coupling stages KC and KD. This is essential, because this measure makes it possible to construct the couplers of the coupling stages KA and KD or KB and KC in the same way; because firstly, the relays within the coupler are combined in relay strips, which also include the rectifier Gr1, Gr2, Gr3, Gr4 connected in series with the response windings A II, B II, CII, DII for the known purpose of decoupling the response circuits; Second, the couplers are usually equipped with unequal numbers of inputs and outputs, the number of both inputs and outputs of a coupler of the first (or second) coupling stage being equal to the number of both outputs and inputs of a coupler of the fourth (or third) coupling stage should be.

If the couplers of the first and fourth or of the second and third coupling stage are constructed in a structurally uniform manner, the rectifiers consequently have a different polarity in the first two coupling stages than in the third and fourth coupling stage. Depending on this, the excitation of the coupling relays in the first two coupling stages has a different polarity than in the last two coupling stages. With regard to the response line, this now requires that a connection to be switched through is marked at the point in the coupling network on the response line at which the coupling stages with opposite polarities of the excitation of the coupling relays meet. This marking is, as will be described in more detail below, with the help of the intermediate line auxiliary relay, e.g. B. Lh, applied to the respective contact point. - The two polarities of the excitation of the coupling relays in the first two coupling stages on the one hand and the third and fourth coupling stage on the other hand require with regard to the holding wire, in which the holding coils of the coupling relays of a connection are basically to be connected in series, that the holding windings are also in the first two coupling stages are excited with a different polarity than in the last two coupling stages. This requirement is met by the measure that the holding wire of an intermediate line, which originates from an output of a coupler of the second coupling stage, is connected to ground potential via the winding of the intermediate line relay and that the holding wire of the same intermediate line, which comes from an input of a coupler of a third coupling stage goes out, can also be connected to earth potential via a normally open contact of the same intermediate line relay. The holding wires can consequently be connected to negative potential at the other ends. You run, apart from a single link field, through several coupling stages, so that the holding windings several, z. B, two coupling relays in several, z. B. two coupling stages in series each with a single holding circuit of a connected connection-The response windings are provided for known reasons for decoupling the response circuits when marking a single response circuit, so that this marking is always limited to the response circuit of a clearly defined through-connection path through the coupling network IW remain.

On the input side, the response wire leads via the counting pulse generator Zig, the search selector Swl, the memory Sp and the search selector Sw 2 into the corrector, in which negative potential can be connected to it in order to switch the connection through. On the output side, the response wire leads to the setting set ES, which is assigned to the relevant output coupling group. The response artery also has the multiple characters at the crosspoints.

In FIG. 3 shows a route search artery of the route search network at the bottom. The route search network is a structural image of the entire switching matrix. The routing core of each intermediate pipe, depending contains a break contact, z. B. 11, of this link associated link relay, z. B. Ll, which identifies the state of the intermediate line (whether free or occupied) in the path search artery of the intermediate line (contact disconnected or closed). The route search wires of intermediate lines, each leading to one and the same coupler, converge in a route search node corresponding to this coupler (WK111, e.g. corresponding to the coupler K111, also WK211, WK311, WK411). Since the in a coupler, z. B. K111, connecting intermediate lines in this do not lead via switching means (e.g. holding windings, response windings) from as many crosspoints as is determined by the product of the incoming and outgoing intermediate lines, the multiple characters are drawn the other way around than in the holding wire and response wire; because ever an intermediate line leads to several crosspoints of a coupler, whereas all intermediate lines leading to a coupler in a single path search node corresponding to this coupler, z. B. WK111, merge.

In the intermediate line field Z2, the path search vein contains the normally closed contact 11211 of the link relay L211 to each link relay individually associated intermediate line auxiliary relay, e.g. B. Lh. Since the route search network for Marking a route to be switched through in the switching matrix is also used, such as Will be explained in more detail later, the relay LH is used to mark this record the path search vein in the intermediate line field Z2 and through the contact 21h to be transferred to the contact person.

The routing wires lead on the input side via a respective ZählimpulsgeberZig, a SuchwählerSwl, a memory Sp and a search selector SW2 to the corrector, a route search is initiated from which by closing a contact, by routing potential of about this ZählimpulsgeberZig corresponding input of the switching field to the routing network Coupling matrix is performed. The path search potential spreads from the input to which it is switched on by the corrector, via the path search cores of the intermediate lines to the path search nodes of the fourth coupling stage, provided that the corresponding intermediate lines between all coupling stages are free, i.e. H. the intermediate line relays are de-energized, so that their normally closed contacts located in the path search wires of the intermediate lines are closed.

The in the route search node, z. B. WK411, converging path search veins do not lead to all individual outputs of the switching matrix, but are common, d. H. per route search node, connected to the setting set corresponding to the respective coupling group. This is why there is no multiple character between the route search node WK411 and the setting set ES.

In addition, all of the routes sought are from the intermediate lines of the intermediate line field Z3 individually in the respective output coupling group, z. B. AKG1, corresponding setting kit, e.g. ES1, guided. As will be explained later, this measure serves to reduce the Route selection and route marking (through-connection via LH relay) in the entire switching network to be carried out with the aid of the setting kit.

In the event that between the same two couplers of two adjacent coupling stages more than one intermediate line runs, i.e. that their intermediate lines run in parallel, which usually occurs with partial expansion of a switching network, a second route selection is made among these parallel intermediate lines with the help of the intermediate line relay L ... and the intermediate line auxiliary relay LH. This second, subsequent route search is explained in detail below in FIG. F i g. 4 shows further details of a single output coupling group AKG. The coupling relays C 1 to C 100, of which only the first and the last of a first and last row are shown (which also applies to the coupling relays C801 to C 900, D 1 to D 100 and D 601 to D 700 ) a first coupler of the coupling stage KC; the coupling relays C 801 to C 900 represent the last coupler of the coupling stage KC of this output coupler. The coupling relays D 1 to D 100 and D 601 to D 700 represent the first and last couplers of the coupling stage KD in this output coupling group the response circuits of the coupling relays, and the windings correspond to windings C (II) and D (II) in FIG. 3. It is also here as in FIG. 2 and 3, the link field Z 3 is shown. The designation KC for the third coupling stage also corresponds to the designation in FIG . 3. The fourth coupling stage KD is already shown here together with parts of the setting set ES , so that the designation KDIES was chosen for it.

The coupling relays of a coupler are connected via row leads and column leads with which the response relay windings, e.g. B. C 1 to C 100, or the rectifier individually connected in series with them, z. B. Gc 1 to Gc 100, are individually excited in a known manner. The in F i g. Holding windings 4, not shown, the coupling relay, and the signal circuits are well known, equally 'is constructed in terms of coordinates.

Furthermore, in FIG. 4 shows a part of the route search nodes WK311 to WK310 and WK411 to WK410 with the corresponding route search cores. These route search nodes, in particular the route search nodes WK311 and WK310, clearly show the previously described summary of the route search cores of all intermediate lines that are connected to a coupler in one point.

If the corrector applies path search potential via a counting pulse generator Zig to an input of the switching network, it is transmitted in accordance with the procedure shown in FIG . 2 grouping from coupling stage to coupling stage shown, also valid for the route search network, spreads further to all those route search nodes to which intermediate lines closed via intermediate line relay break contacts lead over all coupling stages and link fields. At the routing node to WK411 WK416 of the fourth switching stage - and likewise to all routing node in the other output switching matrices - are each a Wegesuchpräfrelais turned on responsive, wenn'ad # his. Wegesuthknoten Wegesuchpotential -appears * The 'Wegesuchprüfrelais are -so high- # ohmig, -that intermediate line auxiliary relays LH (cf. Fig. 3) cannot respond when searching for a route. If a routing test relay of a coupler responds, it indicates that the outputs of the coupler can be reached, d. h, that a connection, if required by the occupied Zählimpulsgeber Zig over -the switching network and -. about -a output of this coupler switched through ist.- The selection of a single of a plurality of the single Wegesuchknoten- Wegesuchaderff through the relay N 1 to N 10 of the Central marker ZM is further below in the description of FIG. 3 and 6 explained.

- In the fig. 5 - further details of one - are provided for each output coupling group; Adjustment set - (see Fig. 2 in ES pro AKG ...) .

, To the ten outputs of each of the six couplers - one. Output coupling group are connected ten outgoing lines, derenPrüf- undBelegungsr veins (c-wire) jeweils- are individually connected to the test points cond 1, conductor 2 to Ltg10. The ten outputs of a coupler always correspond to one in FIG . 5 horizontally shown row of ten test points, e.g. B. Line 1, Line 2 .... Line 0. The row of ten test points Ltg 51, Ltg 52 to Ltg60 is also shown, which corresponds to the outgoing lines connected to the sixth coupler of this coupling group.

For each coupler of the fourth switching stage, e.g. B. K411, a path test relay, for example WP1 -.- is provided, the winding of which is shown in FIG . 4 is shown and also in the description of FIG. 4 is mentioned. Work contacts of a path test relay, z. B. WP 1, - are to the test points, z. B. Ltg 1 to Ltg 10, the outputs of a coupler, z. B. the first coupler of this output coupling group turned on. So if path search potential reaches through the path search network of the switching matrix to the path search node of a coupler, so that its path search relay responds "this means that, with regard to the state (free or occupied) of all parts of the switching network, the occupied counting pulse generator Zig bis is switched through to this coupler is possible. When the routing test relay, e.g. WP1, of a coupler is activated, all of its outputs for preliminary testing and line testing through the contacts, e.g. lwpl to lOwpl, are preparatory to preliminary test bridges YB 1 to. VB 10 which can also be subdivided, such as the preliminary test bridges YB2 and VB10 in YB2a and -VB2b or VB10a and YBIOb, if the lines corresponding to the test points belong to different 'line bundles'. They can also be subdivided twice In different setting sets #, for example in setting sets ES1 and ESn, # this subdivision is usually different; eighth representation assumed that the subdivision of the preliminary test bridges in these two setting sets is the same. -Die'Gleichrichter Gr Gr 1 to 60 serve in known manner, the decoupling, all or lower Each divided Vorprüfbrücke corresponds to a respective Markierrelais Ml to M through its contacts, such 10.-. B. I m 1 to 6m1, the six test points corresponding to a preliminary test bridge, z. B. Ltgl to Ltg51, to the six Pjrüfrelais-Pl to P6 after closing the Kontaktelpk to 6pk of a test control relay PK can be connected. The test relays P1 to P6 are mutually dependent in a known manner, by connecting their windings to a changeover switch contact chain formed from their own contacts lp 1, 2p 1 to lp 6, 2p 6.

The setting set also has a connection relay An with contacts lan, 2an to man . The setting set with its pre-test bridges VB 1 to VB 10 can be connected to the pre-test wires of the same name in the central marker Zm via pre-test wires vpl to vpm via these connection contacts. For this purpose, the connection relay An can be energized by the central marker.

In Fig. 6 the central marker (Zm in FIG . 1) is shown in extracts. It consists in: the parts shown essentially of a series of target point relays, of which the two target point relay - ZP 1 -and -ZP 2 are shown, also of five Vörpr, üfrelais V 1, Y 2. V 5, of - which - are shown, the said further selected from a coordinate-shaped constructed rectifier matrix G 1 to G 30 from four RangierverdrahtungenRY1, RY2, RY3, RY 4 and a Nachprüfschaltung Ph, which for precise control of the testing as a free - Lines (checking test lines with regard to triggering connections, if necessary via cables; protection against double connections) -. The central marker receives the target point information from the corrector Um with the help of the target point relays'ZPl, ZP2, etc. - for each. A target point relay is provided for the target point. Since there are usually several options for reaching each destination (different routes, detours via different trunk groups), the central marker makes a selection from these options, as will be described below. The central marker is connected in parallel to all setting sets ESI to ESn via a ring line RL. - - - In order to facilitate - DER understanding how the Zentralmarkierers and the importance of its components are described in conjunction with the circuitry contexts below two cases of, Verbindiiiigsdurchschaltungen, where except the F-6 ig. reference is taken overall to all other Figures and to the above parts of the description.

T input was on hand. from F i g. 7 explains that, for example, the centers B and C can be reached from a control center X via the following trunk groups and in the following order of priority of the selection of the soffit groups: The control center B, in the future referred to as target point -1 , via the line # Bd2 bundle BDL, and the center C, as a target spot künftig- 2 denotes, -on the line bundle 31 Bd Bd 1. - Is a compound of the -Zentrale # X from an occupied in their Zählimpulsgeber Zig to the target point 1 and 2, then the target point relay ZP 1 or ZP 2 in the central marker Zin is made to respond in the center X by the corrector around. Furthermore, the contact cb (FI g. 6) of an occupancy relay, not shown, is closed in the central marker.

Now that the central marker has a target point information by z. B. the target point relay ZPl is connected, has received, all trunk groups that come into question to reach this target point must then be checked whether they contain at least one 'free line, each of which at the same time from the occupied counting pulse generator Zig via the Switching network is reachable.

The # lines connected to the outputs of the couplers of the output coupling groups, combined in line bundles, are always connected to different couplers, namely the lines of a line bundle can be connected to the couplers of a single output coupling group as well as to several different output coupling groups. It is now assumed that the lines of the trunk group Bd 1 are only connected to outputs of couplers of the output coupling group AKGn and that the lines of the trunk groups Bd 2 and Bd3 are each connected to the outputs of couplers of the two coupling groups AKG1 and AKGn.

Since the trunk groups Bd 2 and Bd 1 come into question to control the target point ZPl, the two corresponding setting sets ES 1 and ES n must be connected to the central marker in this case. These setting sets, apart from the individual wiring of the preliminary test plugs to vpm with the preliminary test bridges VB, are of the same type as in FIG . 5 shown. For the purpose of simplifying this description, it should also be assumed that the subdivision of the preliminary test bridges in the two setting sets, which is actually selected in each setting set 'iüdMduell, is carried out in the same way.

. At this point, a few things must be said about the connection of the lines of the at hand F i g. 7 explained line bundle Bd 1, Bd 2, Bd 3 are inserted explanatory. It is assumed that the lines of the line bundle Bd 1 are each connected to the first outputs of all six couplers in the output coupling group AKGn: K4n1 to K4n6, which are therefore connected to the six test points Ltg 1 to Ltg 51, i.e. h of the preliminary test bridge YB 1 in the setting set ES n . The bundle Bdl thus comprises six lines. It is also assumed that the lines of the line bundle Bd2 are connected in the output coupling group AKG1 to the first outputs of all six couplers and to the second outputs of the first three couplers, which are connected to the nine test points Line 1 to Line 51 and Line 2 to Line 22, d. H. correspond to the preliminary test bridges YB 1 and VB 2 in setting set ES 1 . The bundle Bd 2 thus comprises nine lines. It is also assumed that the lines of the line bundle Bd3 are on the one hand in the output coupling group AKGI at the second outputs of the fourth, fifth and sixth coupler, which is the test points Ltg 32, Ltg 42, Ltg 52, d. H. the preliminary test bridge VB 2 b in the setting set ES 1 , and on the other hand at the last (tenth) outputs of the first four couplers, which are also the test points Ltg10 to Ltg40, i.e. H. the pre-test bridge VB 10 a in the setting set ES n , connected. The line bundle BD3 thus comprises seven lines.

If the target point relay ZPl responds in the central marker, this initially means that the setting sets ESI and ESn of the output coupling groups AKG1 and AKGn must switch on with their relays An via the ring line RL to the central marker. The mentioned relays An speak via the contacts 16 zp 1 to 20 zp 1 in the following circuits: 1. (Fig # 6) Earth, cb, -3v1, 3v2, 3v5, G1r1,16zpl- AN1, (further, Fi g ' 5 as Gli 2 # 17 zp 1 ES 1) AN, An, 2. (Fig. 6) Earth, cb, 3v1, 3v2, 3v5, GIr 5, 20 zp 1, AN n, (further Fig. 5 as ES n) 'AN, An, -.

Both circuits refer to FIG. 6 and 5; The latter also represents the setting set ES 1 and ESn in order to be able to make this description easier.

The wiring RY1 defines which setting sets have to be connected to the central marker at each of the different target points. This depends on the output coupling groups AKG1 to AKGn to which the lines suitable for controlling a target point are connected. The selection of a single one of the several initially switched on setting sets is described in more detail below.

The response of the target point relay ZPl also means that the lines of the trunk groups Bd2 and Bdl come into question in this order of priority for establishing a connection. These bundles correspond to the pre-test bridges VB1 and VB2 in the setting set ES1 and the pre-test bridge VB1 in the setting set ESn. A selection must now be made from the lines corresponding to these preliminary test bridges, which therefore each form a group within the line bundle per preliminary test bridge. This selection takes place in two steps. First, in a group test process, one of the pre-test bridges is selected by the central marker, of which at least one of the corresponding lines is free and at the same time accessible; It can be reached when, as described above, the coupler to which it is connected can be reached, ie when the associated contact, e.g. B. 1 wp 1 is closed. To understand how the accessibility of lines is determined by the route search, it should be added here that, simultaneously with the delivery of the destination information, route search potential is connected to the relevant input of the switching network KF via the counting pulse generator Zig, which is occupied by the corrector Um, and that how previously described, depending on the state (whether free or occupied) all parts of the switching network Wegesuchprüfrelals address, z. B. the path test relay WP1 via the following circuit, 3. - (corrector) ' '. . ., (Zig), (further F i 3) WK111, Glll, 11, WK211, G112, 11211, LH, WK311, Gw31111, 1311/1, Gw41111, (further F i g. 4) WK 411, WP 1, Earth.

Other route test relays also respond, which also have route search potential. The Wegesuchprüfrais now mark so with their contacts, z. B. 1 wp 1, whether the lines concerned can be reached.

When selecting the preliminary test bridges, the order of precedence that relates to the cable bundle must be observed. This test must therefore give preference to the preliminary test bridges VB 1 and VB 2 in the setting set ES 1 over the preliminary test bridge YB 10 a in the setting set ESn. - Since the second step of the test - the individual line test - can only ever refer to the lines corresponding to a single preliminary test bridge, when selecting a preliminary test bridge, a preferential order of precedence extending to all preliminary test bridges is applied, which - are in the following order is to extend the Vorprüfbrücken mentioned:, VB 1, YB 2 a (both in the adjustment set ES 1), YB-10 A (A - steRsatz ES n).

It should be remembered that the subdivision of the preliminary test bridges, which is usually different in the various setting sets depending on the affiliation of the connected lines to different line bundles, is assumed to be the same in setting sets 9S1 and ESn, so in the description a single representation can be used for the two setting sets ES1 and ESn. However, the wiring of the pre-test bridges vpl to vpm with the pre-test bridges is different in both sets of settings. In Fig. 5 shows the wiring in the two mentioned setting sets differently. The wirings in setting set ES1 are shown by dashed lines in the setting set ESn.

The test bridges VB 1 and YB 2 on the setting set ES1 are connected to the Vorp-Rüfadernvp2undvpl (m-1) of the Riiigleitung-RL via wirings drawn with dash-dotted lines. The preliminary test bridge VB 1 im. Drop-in set ESn is connected to the pre-testing wire of the ring line-RL- via a dashed wiring. The selection among the pre-test bridges is made with the pre-test relays Vl, V2 b7is'V5. These pretest relays are high - it is now assumed that the test points line 2 in setting set ES 1 and line 1 and line 51 in setting set ESn: carry free potential, so that the pretest relays V2 and V5 respond in the following branched circuit: 4. Earth, cb, 3 v 1, 3 v 2, ..., 3 v 5, G1r2, V2,12zpl ... G1r5, V5, 15zpl Gr2, 2wpl, Ltg2, vp (m-1), (m-1) an (ES1), "2a vp m, m an (ES n), VB 1, Gr 1, 1 wp 1, Ltg 1, Gr 51, 1 wp 6, Lig 51, The responsive pre-test relay separates circuit 1 at contact 3 v 2 and forms the following holding circuit for its own winding-, 5th earth, cb, 3 v JL, 2 v 2, Y 2, 12 zp 1, vp (nz - 1) , (ni - 1) an 17zpl, - Anl, (in ES1) AN, An, - (in ES1) YB2a, Gr2,2wpl, Ltg2, ... , -. By opening the contact 3v2, the pre-test relay V5 is de-energized, as may the other pre-test relay (between V2 and # 75), not shown.

By responding to a pre-test relay, firstly a single pre-test bridge is selected in one of the possibly several connected setting sets, which at least one both free ohmic and can preferably be designed as electronic assemblies. They check whether at least one of the lines corresponding to a preliminary test bridge is free and accessible. Since only the pre-test relays VI, V2 and V5 are shown, these are used for selection in the description. The windings of the pre-test relays VI, V2 to V5 are connected to each of the contacts llzpl, 12zpl to 15zpl / llzp2, 12zp2 to 15zp2 etc. of the target point relays. If the target point relay Izp is addressed, the pre-test relay Vl is connected via the contact 11 zp 1, the pre-test wire vp 2 and the contact 2 on in the setting set ES 1 to the pre-test bridge VB1 of the setting set ES1; Furthermore, the pre-test relay V2 is connected via the contact 12zpl, the pre-test wires vp (m-1) and the contact (m-1) on in the setting set ES1 to the pre-test bridge VB2a of the setting set ES 1 ; Furthermore, the pre-test relay V 5 is via the contact 15 zp 1, the pre-test wire vp m and the contact man im. Setting set ES n connected to the pre-test bridge VB 1 in setting set ES n .

The pre-test bridges are connected with test leads from to the outputs from lines connected to such Ko # plem via contacts of the couplers assigned Path search relay connected to which a connection in the Ko # pelfeld of the occupied counter is possible.

The preliminary test bridges therefore only carry free potential from test lines that are free and accessible at the same time. The above-mentioned pre-test relays respond if at least one line is free and accessible at the same time on the pre-test bridges of the set-up kits connected to them. as well as reachable outgoing line. Secondly, since a pre-test bridge can only belong to a single setting set, one of the possibly several connected setting sets is also selected. This is described in more detail below: As seen from the - g i F. 5 and 6 it can be seen the contact already when closing cb formed and all of the contacts of the relay ZP 1 Ansprechstromkreise 1 and 2 for the relay, and that is per Vorpräfrelais that participates in activation of a target point, each formed a Ansprechstromkreis. These response circuits 1 and 2 lead individually via the rectifiers Glrl to G1r5 and at the same time individually via the normally open contacts 2v1, 2v2 to 2v5 of the pre-test relays. Each Ansprechstromkreis via a single normally open contact 16zpl, 17zpl to 20zpl of corresponding to the controlled target point target point relay ZPL This work contacts are further connected through wirings RV 1 with lines AN 1 to AN n, each of which leads to each one of the setting sets ES1 to ESn and this with the connection relay, z. B. An 1, is connected (see. Circuits 1 and 2). The mentioned wiring RVLs are implemented in the same way as the sequence of selection of the pre-test bridges in the setting sets, namely the response circuits assigned to the pre-test relays VI, V2 to V5 lead to the relays An of those setting sets to which the pre-test bridges tested by the pre-test relays also belong. This becomes particularly clear on the basis of the description of circuits 4 and 5.

The contacts 16 zp 1 and 17 zp 1, which are assigned to the preliminary test relays VI and V2 testing the preliminary test bridges VB1 and VB2a of the setting set ES1, are connected to the connection relay of the setting set ES 1 ; Furthermore, the contact 20 zp 1, which is assigned to the preliminary test relay V5 testing the preliminary test bridge VB1 of the setting set ESn, is connected to the connection relay An of the setting set ESn (cf. circuits 1 and 2).

The pre-test relay speaks when selecting the pre-test bridges V2 on, so only the setting set remains connected to the marker, in which the selected pre-test bridge is located, i.e. the setting set ES1, as the circuit 5 formed as a holding circuit for the relay An only this one setting set will. The response circuits of the connection relays of the other setting sets, ie in this case the setting set ESn are separated again. This is the Selection among the preliminary test bridges of different setting sets in terms of their effect at the same time a selection among the setting sets themselves.

After one of the preliminary test bridges has been selected according to the order of preference according to which the trunk groups are suitable for the control of a destination, a free accessible line is selected from the outgoing lines corresponding to a selected preliminary test bridge. For this purpose, one of the ten marking relays in the central marker is switched on. Corresponding to the wiring RV2 of the pre-test relays V1 to V5 , the response circuits for the marker relays, referred to for short as marker circuits, are wired RV3. Since when the pre-test relay V2 responds on the basis of the target point information expressed in the target point relay ZPl, the pre-test bridge corresponding to a second column of test points Ltg2 to Ltg52 has been selected, the marking line Ml 3 is connected to earth potential via contact 7 zp 1 with contact 1 v 2 switchable. Analogous to the columns in which the pre-test bridges checked by the pre-test relays V1, V2 and V5 are located, a corresponding one of the marker relays M 1 to MIO in the selected setting set is switched on depending on the previously excited target point relay and the subsequently addressed pre-test relay. The RV3 jumper wiring is designed accordingly. The marking relay M2 of the setting set ES1 is now switched on via the following circuit: 6. Earth, 1v2,7zpl, M12, M2, -.

This marking relay M2 corresponds to a preliminary test bridge or the preliminary test bridges, the one above the other in a vertically drawn column of test points, z. B. Ltg2 to line 52.

Via the contacts of the marker relay in question, the test points in the column of test points corresponding to this marker relay are individually connected to test relays PI to P6 , provided that the test points correspond to lines that can be reached, i.e. H. the coupler, z. B. K 411, their associated path test relay, z. B. WP 1 is excited. So z. B. the test points line 2 to line 52 connected to the test relays Pl to P6 through the contacts 1m2 to 6m2 of the marker relay M2, provided that the contacts 2wpl to 2wp6 are closed; the test control relay PK in the setting set has already responded in preparation after the relay An has responded, after it has been connected to the circuit 7. (Fig. 6) Earth, cb, 3v1, 2v2, 17zpl, Anl, ( Fig. 5) AN, x on, PK, 2 p 6, ..., 2 p 1, - was excited.

Of the lines corresponding to the test points line 2 to line 52 , however, only the lines corresponding to the preliminary test bridge YB 2 a in the setting set ES 1 have been selected in summary when selecting the preliminary test bridges. Since the further lines, namely the Vorprüfbrücke VB 2 b corresponding lines are not eligible for a connection through-connection in question, only the corresponding one of the Vorprüfbrücke VB2a lines are used for a selective conduction test.

For this purpose, the rectifier matrix connected to the jumper wiring RV4 and to the test relay of the setting sets is provided in the marker, which consists of the rectifiers Gl to G30 .

This matrix has ten switching points Shl to Sh10 on the jumper wiring RY4. The first switching point SH1 leads to the rectifiers Gl, G6, Gll, G16, G21, G26 via an uninterrupted column line of the matrix. The second switching point Sh2 only leads to the rectifiers G2 and G7; then this column line is interrupted. The third switching point Sh3 leads via the second part of the interrupted second column line to the rectifiers G 12, G 17, G 22, G 27. From FIG. 6 shows the connection of the other switching points Sh4 to Sh10 on the jumper wiring RV4 to the rectifier matrix. Any number of the six test relays in the connected setting set can be effectively switched via the ten switching points. So over the first switching point z. B. all six test relays, the test relays P 1 and P 2 via the second switching point, the test relays P3, P4, P5 and P6 etc. via the third switching point. In the above-described operation example 1 are for controlling the destination of the Vorprüfbrücken the VB 1 and VB2 in the adjustment set ES1 and Vorprüfbrücke VB 1 in the adjustment set ES n corresponding outgoing lines - for selection. Corresponding to the pre-test relays VI, V2 and VS selected from these three pre-test bridges, the contacts Izpl and 5 zp 1 of the target point relay ZP 1 connected to the contacts 1 v 1 and 1 v 5 of the pre-test relays Vl and VS are connected to the first switching point via the jumper wiring RV4 , via which all six test relays Pl to P6 are activated, because the pre-test bridges YB 1 checked by the pre-test relays V 1 and V 5 in this case in the two setting sets ES 1 and ES n are not subdivided. As already described, the pre-test bridge VB2a has been selected in the ESI setting set. The preliminary test bridge, which corresponds to the second column, is divided into the preliminary test bridges VB2a and VB2b. Since the pre-test bridge VB2a was selected in the pre-test by the pre-test relay V2, the contact 1v2-of the pre-pre-relay V2 is connected to the rectifiers G3, G8 and G13 via the contact 2zpl of the target point relay ZPl and via the jumper wiring RY4 and the fourth switching point first three pre-relays P 1, P 2 and P 3 are activated. Despite the fact that the contacts 2 to 6 m2 of the marking relay may have previously switched all test relays P 1 to P 6 to all test points Ltg 2 to Ltg52 of this column, only the three outgoing lines corresponding to the preliminary test bridge VB2a are subjected to a selective test (provided that the corresponding contacts 2wpl etc. are closed).

Of the three effectively switched pre-relays P1, P2 and P3 (P2 and P3 are not shown), those are energized that are connected to free lines that can be reached via the switching network. It is assumed that the three mentioned relays are energized and respond. Only the response circuit of the test relay Pl is named below: 8. (F i g. 6) Earth, 1 v 2, 2 zp 1, (Sh 4), G 3, PA 1, (F i g. 5) PA 1, P 1, 1 pk, 1 m 2, 2 wp 1, rtg 2, The relay Pl forms a holding circuit via its winding and its contact 1 p 1 to the negative potential: 9. ( Fig. 6) Earth, 1 v 2, 2 zp 1, (Sh 4), G 3, PA 1, (F i g. 5) PA 1, Pl, lp 1, - and separates the excitation circuit 7 of the relayPK at Kontakt2pl so that it drops out; furthermore, by opening the contact 2pl it is prevented that the two '. other test relays P2 and P3, not shown, can also form holding circuits. The test control relay PK drops out, opens its contacts 1 pk to 6 pk and closes its contact 7pk. Of the test relays mentioned, only the first one remains excited in its holding circuit, whereas the others drop off again because they could not form a holding current crisis. The contacts 2pl to 6pl therefore represent a selection contact chain.

After the relay PK has dropped out, a test circuit is also formed by closing contact 7pk: 10. (Fig. 6) Earth, Ph, ph, (Fig. 5) 7pk, 3pl, 1m2, 2wpl, Ltg2, the outgoing connected to the test pointLtg2 The line is now subjected to a re-test, which means that parallel testing (double connection), testing for a test line in a triggering connection (incorrect connection) and the like can be avoided with the greatest possible degree of certainty. Verification circuits are already known, e.g. B. by the German Auslegeschrift 1170 015. If this check leads to a positive result, the contact ph 1 closes (in FIG. 3) in the central marker Zm, via which the earth potential is applied in the output coupling group AKG1. This switches on the response circuit for the coupling relays of all coupling stages. For this purpose, however, a route selection takes place beforehand, which is then described before the description of the response circuits is continued.

First of all, it should be remembered that by the one addressed test relay PI a single specific, namely the first coupler, z. B. K411, the output coupling group, z. B. AKG1, is designated. A very specific output from this coupler to which the selected free line is connected is designated by the one addressed marking relay M2 with its contact 1 m2. This free line is due to the consideration of the result of the route search process (response of route search relay, e.g. WP 1) when selecting a preliminary test bridge corresponding outgoing lines and when selecting a single free of these with certainty also via the switching matrix. This accessibility relates to the entire coupler to which this one selected free line is connected.

It is now possible that several paths in the coupling network can be switched through between the incoming , busy counting pulse generator Zig and the coupler K411. Assuming that the incoming busy counting pulse generator Zig is switched on in the first coupling stage KA (Fig. 2) on the couplerK111, z. B. paths via the intermediate lines ZLI and ZL10 in the intermediate line field Z2 in Figure 2 can be switched through by the intermediate lines, each individually between the couplers KM and K211, further KM and K210, further K311 and K411 and further K310 and K411 are each free . These two paths (there can also be more free paths to choose from) do not overlap in the switching matrix and only meet at couplers KM and K411. This is due to the in FIG. 2 grouping shown guaranteed. One of these routes is selected at the coupler to which the previously selected free, accessible, outgoing line is connected, by selecting one of the incoming interconnections of the interconnection field 23 connected to this coupler K411 which carries the route search potential. The path search arms connected to this coupler and corresponding to the intermediate lines in the intermediate line field Z3 are shown in FIG . 4 shown. They are brought together at the WPI route search relay. As already described, the fact that this is a coupler K411 is evident from the response state of the test relay PI, whose contacts 4pl to 13pl individually connect the route search wires to the route selection relays Nl to N10 in the central marker Zm. Like the route search relays WP1 to WP6, these route selection relays are initially high-resistance and likewise do not load the route search cores in terms of current. from A response circuit is established via contacts 3n1 and 3n10 formed for the auxiliary route selection relay WH, which responds and disconnects the circuit 11 of the route selection relay with its contact whl again. A structurally secured contact sequence ensures that contact wh2 closes before contact wh 1 opens, whereby the chain of changeover contacts 1n1, 2n1, 1n2, 2n2 to 10n2 is connected directly to earth potential with its low-resistance holding winding (11) connected to the corresponding path search wire connected via the contact 4 p 1 , while the other addressed path selection relay N ... drop out again. By the addressed Wegeauswahlrelals Nl ground potential is a low impedance at the routing wire over the contact 4pl of the test relay P 1. This routing wire is energized to the routing node WK 111 g in the routing network via the routing node WK211 and WK311 and dieZwischenleitungZL1 imZwischenleitungsfeldZ2 (s. F i. 3 ). The intermediate line auxiliary relay LH in FIG. 1 speaks in the path search vein that is assigned to the intermediate line ZLI . 3 via circuit 13. (Fig. 4) Earth, wh2, 2n1, N1 (II), 4pl, 1311/1, Gw31111, WK311, (Fig. 3) WK311, LH, 11211, GL12, WK211, 11, G111 , WK111, (Zig), ..., - an. The contact 2 Ih of the relay LH connects ground potential via the contact phl to the response wire (FIG . 3) of the same intermediate line.

Now let us first consider the case that between each coupler of the one and each coupler of the other switching stage within each switching group and between each coupler of the second and each corresponding coupler of the third switching stage there is only a single intermediate line. In this case, for the described switching path from couplerK111 to couplerK411 via couplers K211 and K311 , only a single link in each of the link fields speaks to the route selection relay, after the test relay P1 has been addressed, those who find route search potential on the corresponding route search cores. It is assumed that the route selection relays Nl and N10 respond via the following circuit: Zl, Z2 and Z3 available. By selecting the intermediate line ZL1 in the intermediate line field Z2, the intermediate lines in the two intermediate line fields Z1 and Z3 can therefore also be clearly determined. Furthermore, the coupling relays which are to be switched on to switch the connection through are also marked by the intermediate lines and the specific input and the specific output.

Thus, negative voltage potential arrives via the contact 14 p 1 in FIG. 4 to the response coils of the coupling relays D ... of the second column, not shown, of coupling relays, to which the designations D2, D12, D22 to D92 would correspond analogously. Since the connection must also take place via the coupler K311 of the coupling stage KC, consequently via the first intermediate line, only the coupling relay belonging to the first row of the second column of the coupler K411 can be used for the connection.

By a similar coordinate condition is the K311 coupling relays Cl intended for the through-connection in the coupler. The coupling relay Cl and the coupling relay D2, not shown, are energized and they respond via the following circuit: 14. ( Fig. 4) -, 14pl, 7m2 (not shown, but analogous to 7 m 1 and 7 m 10; see further below. F i g. 3) Gl 4, D (II), GL 3, C (11), 2 Ih, ph 1, earth. In the same way, certain coupling relays in coupling stages A and B are excited and respond. This is also the way in . the signal wires, e.g. B. speech cores switched through. The coupling relays also form a corresponding holding circuit consisting of two branches over all coupling stages: 15 a) -, (Zig), A (I), a 3, L 1, B (I), b 3, L 211, earth; 15 b) Earth, 21211, C (I), c 3, L 3, D (1), d 3, H, -. This holding circuit, which consists of two branches 15 a and 15 b , contains in each coupling stage the holding coil (I) of the coupling relay and a relay's own working contact connected in series with it. The holding circuit also contains the intermediate line relays Ll, L211 and L3 located in the intermediate line fields, which also respond and indicate the busy state of the intermediate lines by opening their normally closed contacts 11 and 1311/1 located in the path search wires. Furthermore, the holding circuit leads via the winding H of an auxiliary relay H which is assigned to the relevant output of the coupler of the fourth coupling stage and which also responds. Each output of each coupler is each assigned a RelaisH. In Figure 5 this is taken into account in that the contacts h . . . the auxiliary relays assigned to each output as well as the test points Ltg ... of the outgoing lines are numbered. The auxiliary relay H of the newly occupied outgoing line responds and closes its contact h2 (in FIG. 5), whereby earth potential is connected to the test line of the occupied line as an occupancy potential. The verification circuit Ph in the central marker is thereby returned to its idle state, as a result of which the central marker and the setting set return to their idle state in a manner not shown and described. By opening the contact lph of the verification circuit Ph, the circuit 14 is also de-energized; the intermediate line auxiliary relay LH in FIG. 3 dropped. As a result, the route search artery of the newly occupied intermediate line in the intermediate line field Z 2 is also disconnected for the purpose of identifying the busy state at contact 11h. Furthermore, the response circuit 14 is separated again so that the coupling relays addressed only remain energized in their holding circuit.

In the event that in the above-mentioned line bundle Bd2, i.e. under the two groups of lines that correspond to the preliminary test bridges YBI and VB2a in the setting set ES1, no line is free and accessible - so some can be free, but not reachable or reachable, but * not be free - neither the pre-test relay F1 nor the pre-test relay V2 responds during the group test process. If at least one line is free in the group of lines which correspond to the line bundle Bd 1 and which are assigned to the preliminary test bridge YBI in the setting set ESn, for example the lines corresponding to the test points Ltgl and l # tg51, so. In the central marker, the relay V5 is energized via a circuit analogous to the circuit 4, so that it responds and is held in a circuit analogous to the circuit 5. By opening contact 3 v 5 of relay Y 5 , circuits 1 and 2 are separated; the relay An of the setting set ESn is held via a circuit analogous to the circuit 5 , while the relays An of all other setting sets, here of setting set Esl, are thrown off again and cause the relevant setting sets to be triggered.

One of the free accessible lines of the line bundle BdI is selected in the manner already described. Since the lines of the cable lanyard Bdl are assigned to the first outputs of all couplers K4n1 to K4n6 of the output coupling group AKGn, the relay Ml in the setting set ESn is excited via a circuit analogous to circuit 6 , and all test relays Pl to P6 are activated via a circuit analogous to circuit 8 effectively switched, which, in deviation from Stromkreis8, runs the Kontaktelv5, 5zpl, the switching point Sh 1 and the rectifiers G 1, G 6 ... to G26 . The test relay Pl responds and initiates the connection, as has already been explained in detail above.

In the event that destination 2 is to be approached as the destination, the switching processes are very similar. The target point relay ZP2 responds and switches the preliminary test relays Vl, V2 and V5 to the preliminary test bridges VB 10 a in the setting set ES n, YB 2 b in the setting set ESI (these two preliminary test bridges correspond to two groups of lines which together represent the line bundle Ed3) and to the pre-test bridge VBI in the setting set ESn, which corresponds to the cable bundle Pdl. First, the relays An respond to the two setting sets ES 1 and ES n, the lines mentioned are connected in their assigned output coupling groups AKG1 and AKGn, as has already been described. Corresponding to the preliminary test relays VI, V2 and V5 , lines of the groups of lines corresponding to the three mentioned preliminary test bridges are now available for switching through for selection in a group test process, provided that lines are free and accessible. If lines of the line bundle Bd 3 in the group of lines corresponding to the preliminary test bridge YB 10 a of the setting set ESn are free and accessible, the preliminary test relay V 1 responds in a circuit analogous to circuit 4 and forms a circuit via its own contact 2 v 1 5 analog holding circuit. Furthermore, a response circuit for the relay MIO of the setting set ESn, which is analogous to the circuit 6 , is formed via the contacts 1 v 1 and 6 zp 1. In addition, the test relays PI to P4 are activated via the contacts 1 v 1 and 1 zp 2 and the switching point Sh 6 and the rectifiers G 6, GII, G16, G21 , which test lines (see circuits 8 and 9). The relay An of the ESI setting set drops out when contact 3 v 1 is opened . The group of lines corresponding to the preliminary test bridge VB 10 a in the setting set ESn is thus selected by the group test process.

If, on the other hand, at least one line is free in this group of lines, but in the group of lines of the line bundle Bd 3 corresponding to the preliminary test bridge YB 2 b of the setting set ES 1 , the preliminary test relay V2 responds, forming a holding circuit for the relay An of the setting set ES 1 and releases the relay An of the setting set ES n . In the same way as described above, relay M 2 in setting set ES 1 applies, and test relays P 4, P 5 and P 6 of the same setting set are activated (contacts 1 v 2 and 7 zp 2 for relayM2; Kontaktelv2 and 2zp2, Switching point Sh5, rectifier G18, G23, G28 for the relays P 4 to P 6 [see circuits 6, 8 and 9]). This means that the group checking process is di-; of the pre-test bridge VB 2 b selected in the setting set ES 1 corresponding group of lines.

If, on the other hand, at least one line is free in this group of lines, but in the group of lines of the line bundle Bdl corresponding to the preliminary test bridge VB1 of the setting set Esn, the preliminary test relay V5 responds, forms a holding circuit for the relayAn of the setting set ESn and leaves the relayAn des Setting kit ESIL fall off. In the same way, as previously described, relay M 1 responds in setting set ES n , and test relays P 1 to P 6 are activated (contacts 1 v 5 and 10 zp 2 for relay M 1; contacts 1 v 5 and 5 zp 2, switching points Sh 1, rectifier G 1, G6, Gll, G16, G21, G26 for relays P1 to P 6 [see circuits 6, 8 and 9]).

The described selection processes under groups of lines depending on the destination Destination information ' Target point 1 target point 2 Responsive destination relay .... ZP 1 ZP2 Eligible line bundle ...................... Bdl, Bd2 Bdl, Bd3 Line bundle according to ranking in order ................ Vol. 2, Vol. 1, Vol. 3, Vol. 1 Preliminary test bridges, which groups of lines of this line bundles correspond to ........... VB 1 VB2a VB 1 FB10a VB2b YB 1 Affiliation of this preliminary test bridge Notes on setting sets .......... ES1 ES1 ESn ESn ESI ESn Testing pre-test relays .......... vi V2 v5 vi V2 175 Responding marker relays ..... mi M2 mi Mio M2 mi Effective switching point ......... Shl Sh4 Shl Sh6 Sh5 Shl Actively switched test relays (partially not shown) ........ PltoP6 PltoP3 PltoP6 PltoP4 P4toP6 PltoP6 Subsequently, with regard to the route selection in the switching network, the case is considered that between each two couplers of successive switching stages, for example between the couplers K211 and K311, furthermore the couplers K210 and K310 etc., more intermediate lines are provided than just a single one. Thus, for example, four intermediate lines can be provided between each two couplers of adjacent coupling stages in the switching network mentioned. In particular, intermediate lines in the switching network are arranged to run parallel in this way when such a switching network is already being operated in the stage of partial expansion. As a rule, this is temporarily always the case in any such switching system. So lead at a z. B. only 50% partial expansion of the entire switching network, the outputs of each of the switching groups in the first two switching stages to inputs of only half as many output switching groups as in the final expansion; there, but nevertheless all the outputs of the couplers to be the second switching stage is connected in each coupling group via intermediate lines to inputs of the coupler of the third coupling stage, must always two intermediate lines are routed in parallel in the manner described above in the intermediate line box Z 2nd

The in F i g. The grouping shown in FIG. 2 is now retained in this way even in the case of partial expansion, because it is very advantageous for the described route search and route selection. It would be conceivable, in the event of an increase in the number of information between two specific coupling groups in the Zwiinformation and depending on a target-point-dependent order of precedence in which line bundles consisting of the groups of lines mentioned are suitable for establishing a connection, are summarized below in a table that provides an overview of the should give described selection processes. interconnection field Z2 lying intermediate lines deviate from the intermediate lines only between corresponding couplers, z. B. K211 and K311 as well as K210 and K310, to provide, special additional intermediate lines between these two coupling groups in the case of partial expansion, z. B. between the couplers K211 and K310 or K210 and K311 etc. to be arranged. However, this option is expressly refrained from, as the grouping according to FIG . 2 given advantage not to be forfeited. If the principle of grouping according to FIG. 2 retained even with partial expansion, the principle of route search and route selection can be retained to the effect that when route selection, as already described, at a coupler of the fourth coupling stage, z. B. K 411, the coupler of the second and third switching stage can be clearly determined via which the connection is to be switched through. Is z. B. selected a line leading to the coupler K 310 when selecting the path on the coupler K 411, this firstly determines this coupler in the third coupling stage and in the second coupling stage depending on the coupler K 310 and the coupler K 111 to which the occupied counting pulse generator is connected, only the coupler K210 is suitable for connection, i.e. it is intended for this purpose. Only are now still in the Zwischenleitungsfeldem of several, between the same couplers, z. B. K211, K311, parallel intermediate lines to select a free one. For this purpose, the in FIG. The circuit arrangement shown in FIG. 8 , which is a corresponding extension of FIG. 3 represents.

It is assumed that, in the couplers extend KM to K110 and K211 to K210 comprehensive coupling group of each coupler of the first coupling level to each coupler of the second coupling stage two intermediate lines parallel. Further, it is assumed that each coupler of the second switching stage to each corresponding coupler (z. B. corresponding to KopplerK211 and K311 or the coupler K 210 and K 310 side) of the third switching stage extend four intermediate lines parallel. As in the case of the previously described individual arrangement (FIG. 3) of intermediate lines, each intermediate line leads from an individual output of a coupler to an individual input of a coupler. Intermediate lines running in parallel lead from different outputs of a single coupler to different inputs of a single coupler of the next switching stage.

In Fig. 8 is similar to FIG. 3 shown by each switching stage KA to KD or from each intermediate line box Z 1 to Z 3 are each a coupling point (coupling relays) and one each intermediate line or several parallel-running intermediate lines. The coupling relays in the four coupling stages KA, KB, KC and KD are based on the illustration in FIG. 3 labeled A ', B', C and D 'in a corresponding manner. Likewise, the path search nodes corresponding to the couplers of the four coupling stages are also based on the illustration in FIG . 3 with WK III ', WK211', WK311 ' and WK411'. In Fig. 8 , however, the representation is limited to the response circuits of the coupling relays and to path search circuits.

A pass through all four leading switching stages Ansprechstromkreis is fully shown, d. H. with coupling relays A, B, C and D ' with series-connected rectifiers Gl l !, Gl 2', Gl Y, Gl 4. In the illustrated response wire of the intermediate line in the intermediate line field Zl, a contact 31hl is also shown, which is described below . Below the response wire, which runs through all the coupling stages, a second response wire is shown, which in the intermediate line field ZI is assigned to a second intermediate line running parallel to the first. The two response wires therefore belong to two intermediate lines that are connected in parallel by a single coupler of the first coupling stage, e.g. B. K 111, to a single coupler of the second coupling stage, z. B. K211, run. The same applies to the four response wires of four intermediate lines, which are also connected in parallel by the coupler of the second switching stage, e.g. B. K211, to a coupler of the third switching stage, z. B. K311, run. These four Ansprechadern are connected with four contacts 31 h 3, 31h4, 31h5 and 31h6 individually, which will be described later in detail.

The response cores of the first two intermediate lines thus lead from the intermediate line field Z1 to the same couplers in the coupling stages KA and KB, specifically to two different outputs and two different inputs. Therefore, the two Ansprechadern in each of the two switching stages are each a multiple characters represented on each. The structure of these couplers and the connection of the intermediate lines to them is shown in FIG. 4 and its description very plausible.

Furthermore, in FIG . 8 shows a path search wire which leads through all coupling stages and which is assigned to the response wires of the same intermediate lines. The route search nodes WK111 ″, WK211 '*, WK311' and WK41l- 'correspond to the couplers KM, K211, K311 and K411 and have remained unchanged compared to the representation of the route search nodes in FIG . 3. In the intermediate line fields, however, the route search cores are per individual Since the intermediate lines run parallel to the same couplers, their individual route search cores also run jointly to and from the same route search nodes. Thus, in the intermediate line field Z 1 there are two route search wires between the route search nodes WK111 'and WK211' and in the intermediate line field Z 2 there are four route search wires between the route search nodes WK211 'and WK311! These two or four path search cores can be recognized by the fact that they run individually over the windings of intermediate line auxiliary relays Lh 1 and Lh 2 or Lh 3, Lh 4, Lh 5 and Lh 6 .

In FIG. 8 , as already stated, the representation is limited to response circuits of the coupling relays and to Weaesuchstromkreise. The holding circuits are not shown; they are designed in the same way as in FIG. 3 shown. From this it can be seen that each holding wire of each intermediate line is assigned an individual intermediate line relay, for example L1, L211, etc., individually. These link relays indicate the busy status of a link by their response status. Contacts 11111/1 and 21111/1 on the one hand and 11111/2 on the other hand are contacts of two in FIG . 8, not shown, individual intermediate line relay of parallel intermediate lines in the intermediate line field Z l. The same applies to contacts 11211/1 to 1 1211/4 in intermediate line field Z 2.

Each link basically corresponds to a link relay, e.g. B. Ll, and in the intermediate line field Z2 also an intermediate line auxiliary relay Lh (Fig . 3). Moreover, (g F i. 8) is also in the intermediate line fields Z1 and Z3 each intermediate pipe, an intermediate pipe for the auxiliary relay. B. Lh 1, Lh 2, assigned, provided that several intermediate lines run in parallel between the same couplers.

The path search veins of parallel intermediate lines run, as shown in FIG . 8 shows, each over the winding of the associated intermediate line auxiliary relay Lh 1 and Lh 2 or Lh 3 to Lh 6, to two contact chains of changeover contacts of the intermediate line relays and intermediate line auxiliary relays. By this contact chains a route select among paraUelaufenden between two couplers intermediate lines is performed, if there is already the Durchschalteweg in the switching network which has been determined to be used coupler by the Zentralmarkierer using relay N 1 to N 10 conducted route select regard.

If a connection is now to be carried out via the couplers KM, K211, K311 and K411 and all intermediate lines are free, the intermediate line auxiliary relays Lh 1 and Lh 3 in the following circuit are energized after a route selection by the route selection relays Nl to N10 on the route search wires of a coupler: 16. (Fig. 4) Earth, wh2, 2n1, NI (II), 4pl> 1311/1 (i.e. in Fig. 8 1311/1 ', further Fig. 8) Gl13', WK3ll ', Lh3, 11211/1, 21h6, ..., 21h3, Gl12, WK2ll', Lhl, 111114, 21h2, 21h1, GIll ', WK1ll !, ..., -.

The RelaisLhl and Lh3 respond. With their contacts 31hl and 31h3 they close the response circuits for the coupling relays A ', B', C, Y: 17. (F i g. 8) Earth, 1 ph, 3 Ih 3, B '(II), Gl 2' 3 Ih 1, A '(II), Gll', ..., -.

18. Earth, lph, 3h13, C (II), GIX, D '(II), Gl4', ... 'lph, Also when relays Lh 1 and Lh 3 responded, their changeover contacts 1 1h 1, 2 1h 1 and 1 1h 3, 2 Ih 3 actuated. These converted circuit 16 to the following circuit in which these link auxiliary relays are held: 19. (Fig. 4) Earth, wh2, 2n1, N1 (II), 4pl 1311 (i.e. , in Fig. 8 1311 / 1 ', further Fig. 8' Gl B ', WK 311', Lh 3, 1 1h 3, Gl 12 ', WK 211' Lh 1, 1 Ih 1, Gl ll ', WK 111, ..., -.. Talk now the coupling relay, they described 3 form as g already at hand F i the two-branches common retaining circuit (., see circuit 15 a and 15 b), are in the also the intermediate line relay and responsive. Accordingly, the change-over contacts 11111/1 and 21111/1 open the one hand and 11211/1 and 21211/1 on the other hand their rest sides and close their working faces. Further, also speaks the g in F i. HilfsrelaisH 3 shown in the holding power circuit by which the described manner in already the setting set and the central marker are returned to their idle state, so that the circuit 19 is also disconnected again and the relay Lhl and Bh3 fall again.

If some of the parallel intermediate lines are already occupied when the connection is switched through, the associated intermediate line relays are also energized and their contacts actuated. If, for example, the contacts 11111/1, 211111, 112111, 21211/1 are actuated, after a route selection through the relaysN1 to N10, of which z. For example, when relay N 1 has been energized and responds, the following circuit is formed: 20. ( Fig. 4) Earth, wh 2, 2 n 1, N 1 (11), 4 p 1, 1311 (i.e. in Fig. 8 1311/1 ', further Fig . 8) Gl lY, WK3ll', Lh4, 11211/2, 21211/1, 21h6, 21h5, 21h4, 21h3, Gl12, WK2ll, Lh2, 11111/2 , 21111/1, 21H2, 21H1, Gill ', WK 111'. . . (Zig), -. In this circuit, the relays Lh 2 and Lh4 respond and, in the manner already described, cause the connection to be switched through via the coupling relays and via the intermediate lines corresponding to the intermediate line auxiliary relays Lh4 mentioned in circuit 20. , Through the intermediate line auxiliary relay, eg Lhl to Bh6, is therefore the result of the path selection anzeigendeKriterium, namely the low-impedance switching through of running on certain coupler through-connect path through Kontakte2n1 to 2n10 in Figure 4, was added and the Ansprechadern of the intermediate lines by means of the respective contacts, eg 31h3 to 31h6, marked; In this case, the intermediate line relays and intermediate line auxiliary relays make a selection from, if necessary, several free intermediate lines running in parallel. This marking with the aid of intermediate line auxiliary relays is therefore generally carried out in the second intermediate line field Z2 (see FIG. 3). Is out of the mark depending on a selection among a plurality of parallel intermediate lines are required, these can be made in the intermediate conduit box by means of the already existing auxiliary intermediate line relay, eg Lh3, Lh4, Lh5, Bh6. As shown in FIG. B. ZI, required, this can be done with the help of specially provided intermediate line auxiliary relays, z. B. Lh 1, Lh 2, can be made.

It can now be assumed with certainty that the switching groups comprising the first and second switching stage KA, KB or third and fourth switching stage are always designed for the final stage of expansion of a switching system and that the stage of partial expansion of the switching system by a correspondingly smaller number of these Coupling groups is taken into account. This means that no parallel intermediate lines have to be provided within these coupling groups. Intermediate lines running in parallel are therefore generally only to be provided in the intermediate line field Z2. In this intermediate line field, however, in addition to one intermediate line relay, one intermediate line auxiliary relay is also provided for each intermediate line for marking purposes. Advantageously, these intermediate line auxiliary relays can be used not only for marking purposes but also to select routes among parallel intermediate lines.

Claims (2)

1. A circuit arrangement for telecommunication exchanges, in particular telephone exchange systems with markers and switching the switching devices, which consist of several service switching stages arranged switching switching elements, and which are set by the markers, d a d ur ch g e -kennzeichnet that the switching contact elements in some service switching stages of the switching switch means are summarized in groups that extend to the same switching switching stages and which are individually assigned setting sets that the setting sets are not combined in groups, common parts of the switching switching devices and working at the same time determine the presence of free lines and that they have a common marker among the with groups of switching elements connected to each selected line selects a group with the aid of the setting sets assigned to them, on which at least one free of the selected lines is located and both triggers the setting records assigned to all other groups and initiates a selection from among the selected lines connected to the selected group. 2. Circuit arrangement according to claim 1, characterized in that the marker marks a connection to the selected line with the aid of the setting set across all switching switching stages of the switching switching devices.