DE1078630B - Circuit arrangement for self-dialing long-distance traffic in a telephone system with several network groups, the network group centers of which can be connected in series for a connection - Google Patents

Description

GERMAN

The invention relates to a circuit arrangement for automatic dial-up telecommunications in a telephone system with several star-shaped network groups, the network group centers for one Connection in a sequence of ascending and descending order (end offices, node offices, Main offices, central offices, etc.) can be connected in series, whereby in the network group centers, in particular the node offices, main offices and central offices with central storage these assigned super-central correctors are provided.

The node offices as target offices are through a route over all network group centers In ascending and descending order prescribing target key figure reached (key figure path), but can If necessary, neighboring network group centers also directly bypassing the key figure path can be achieved through cross-connections.

The target exchange code has so far mostly been in the form of a series of impulses from the node exchange transmit forward. Do you want to increase the transmission speed of the target codes go to coded destination selection, in which the entire destination code, from several Consisting of digits, usually in the form of a multi-frequency code given simultaneously for all digits on the line is transmitted, nodal offices will exist side by side in the transitional period of some transmit the target code as a series of impulses, others in coded form. Kick it At several points in the long-distance dialing network, there are transition points from pulse dialing to code dialing and vice versa on.

The invention now aims to operate in parallel with pulse dialing with the simplest possible means and carry out code selection. In particular, in transit offices such as main offices and Central offices, only one and the same type of storage and corrector can be used.

According to the invention this is achieved in that the corrector provided with a code receiver requested by the memory occupied by a calling connection and the frequency code recorded in directional markings for the setting sets of the directional selectors as well as in a DC code to control the memory for the further intended connection establishment in the long-distance dial-up network (»Program of the connection routes«) and for entering the code in the digit memory relay provided for this purpose of the memory is implemented via output lines, while when the target code is recorded in pulse form these are stored in a DC code in memory in the same digit memory relay and via Circuit arrangement

for self-dialing long-distance traffic

in a telephone system

with several network groups,

their network group centers

for a connection one after the other

can be switched

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2 _r Wittelsbacherplatz 2

Dipl.-Ing. Heinz Mertel, Hohenschäftlarn,
has been named as the inventor

the same output lines are given as direct current code to the corrector, which they in turn in a direct current code for controlling the predetermined program of the connection paths as well as in Converts direction markings for the setting sets of the direction selector.

With reference to FIGS. 1 to 3, all that are insignificant for understanding the invention are omitted Details of an embodiment of the invention are described.

Fig. 1 shows the generally known network plan of a Landesf ernwahlnetzes with the network group centers of the individual network levels, namely node offices KA as the lowest, main offices HA as the next higher and central offices ZA as the highest network level;

2 shows connection devices in the form of a block diagram iri the node offices, main offices and central offices;

Fig. 3 shows circuit details in the memory, corrector and setting set of a main office.

As shown in FIG. 1, both a node exchange KAj for pulse dialing and a node exchange KAq for code dialing are connected to the main office HAjc.

The lines TC between main office HA _JC and central office TLAjc are operated with both pulse dialing and code dialing. In addition to the main office HÄjq, both a main office HAj, which can be reached by pulse dialing, and a main office are available to the central office

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HA _C , accessible by code selection, connected. Two node offices KA _C , both accessible by code selection, are connected to this latter main office. The node offices as the destination offices of the connections are reached using three-digit codes.

As FIG. 2 shows, a so-called counting pulse generator ZJq is permanently assigned to each incoming line, which in turn is permanently coupled to a direction selector RW. In the node office KAj - for code number selection by means of pulse series - a zoning device VZ is jointly assigned to several incoming connection paths or their counting pulse generators ZJq.

In the node office KA ₀ - set up for code target selection - is several calling connection paths with individual counting pulse generators ZJq a common zoning device VZ with a code transmitter CS, z. B. a generator for 15 frequencies assigned. A central corrector Umw is assigned to several zoners. With an (o) code, with three frequency reserve groups of five different frequencies each, a three-digit code can be transmitted simultaneously as a six-frequency mixture to the line to the higher-level main office.

In the main office HA _JC , the lines arriving from the node office each lead to a so-called connection set Ans. Several connection sets are z. B. associated with a relay coupler together memory Sp and several memories in turn jointly a centralized corrector, which contains a code receiver CE for 15 frequencies. A so-called self-locking test multiple PV with two parallel test wires is provided between the memory and the corrector, which prevents several memories from being able to occupy the corrector at the same time. Furthermore, between the memory and the corrector there is an input multiple for the code receiver, an input and output multiple for the transmission of the code in direct current code both from the memory to the corrector and vice versa from the corrector to the memory and finally an output multiple Pr for controlling the specified connection paths (program) provided in memory. Output multiples AVI or AVII also run from the corrector Umw to the setting lists ESI or ES II of the first direction selection stage IRW or the second direction selection stage HRW. The target number evaluated by the corrector is used as a direction marker number, e.g. B. in the form of a direct current code (!) Given to the setting sets.

On the basis of Fig. 3, the operation sequence is shown in brief:

If a connection set Ans is occupied, the central memory Sp in the main office is connected to the calling connection path. The broadband receiver BE of the memory checks whether there is a frequency code on the calling line. If this is the case, the memory occupies the direction selector coupled with the connection set and the associated central setting set, if this is free. The assigned setting record is reported to the memory by means of a message criterion; this has the consequence that the memory is connected to the corrector via the test multiple. Relay P responds and switches wires α and b through contacts pt, p2 from the calling line to the corrector. At the same time, contacts p3 ... pl6 of relay P connect wires I ... XXII to the memory and corrector. The code selection receiver converts the received frequencies into direct current code, so that a potential near earth, for example -5V, appears on 3 × 2 of 15 wires (3 × 5 output lines I ... XV). By activating six wires, it is achieved on the one hand that corresponding digit memory relays Zl ... Z5 or Hl ... H5 or Kl ... K5 are excited in the memory, which are locally bound. This potential also causes the transistor amplifier and decoder Vst of the corrector to be controlled accordingly and, via a corresponding routing KP of the code points, the output lines XVI to XXII to the relays Wl, W2, Nl, N 2, NZ, KWl, KW2 in the memory for the program control activated, on the other hand earth potential is applied to two of the marking wires ml ... m6 of the output multiple. The marking wires switch on the direction marker relays MI ... MVI of the setting set after excitation of a coupling relay K in the setting set controlled by the memory. In the storage room

ac are available through the locally bound digit memory relays the digits entered by the corrector for possible later transmission as series of current impulses available via the connection path.

If the memory has received the necessary information, the corrector can be released will.

If a second direction selector URW is to be set, a second query is made to the corrector after the setting record of the second direction selector has reported to the memory. In this case, a marker code (! J) for the setting set of the second direction selector is only output on wires nl ... μ6.

If the memory determines that there is no frequency mixture on the cores α and b , a request for the identification numbers is sent backwards from the memory to the occupying node exchange. The digits of the code that then come in as a series of current impulses - recorded by relay A of the memory - are converted into a code (^) in a relay chain RK and, one after the other, in the usual way in the digit memory relays Zl ... ZS, Hl ... H5 and Kl ... K5, possibly via secondary windings (not shown), stored.

After the digits have been recorded, the first direction selector and thus its setting set are assigned. After receiving the message criterion of the setting record, the memory asks the corrector again. The digits are now from the memory with the help of contacts # 1 ... £ 5, hl ... hS, kl ... kS via the same wires I to XV that were previously used to output the code digits from the corrector to the memory Given the corrector, which now evaluates it in a known manner to the effect that at the same time the information for the program control to the memory (via the wires XVI to XXII) and the (2) code via the wires ml, m6 of the output multiple to the setting of the first direction selector are given.

The arrangement can also be modified in such a way that the occupied memory immediately asks the corrector without waiting for an evaluation of an applied frequency code. If a frequency code is applied to wires α and b , this is evaluated in the code receiver of the corrector. As a result, the memory immediately receives information about the program and for the digit memory relay, whereupon the corrector is enabled. Then a free set of settings of a first direction selector IRW is occupied by the memory, which is a reporting criterion.

rium backwards to the memory, which has the consequence that the memory again occupies the corrector, which receives the digit information from the memory and, depending on this, the direction marker digits for the setting set of the first direction selector I RW . If this statement is not made, the memory sends a request character backwards to the occupying node office for transmission of the code in pulse form. Then the direction selector and its setting set are first assigned and the corrector is queried again.

Finally, the arrangement can also be made in such a way that the memory always sends the request character first for the code number backwards to the occupying node exchange. If within one If no pulse series arrive for a certain time, the setting set is switched on and then at Corrector requested.

Only the same memory is required for the entire control system, so that it can be expanded step-by-step with destination code selection is possible. The cost of wires from and to the corrector has not increased than until now. Likewise, no additions are necessary in the corrector equipped with a code dial receiver.

In the event that the digits of the code are not all transmitted in coded form at the same time should be, which with an (I) -code requires three storage groups of five frequencies each, but one after the other, which only requires a storage group of five frequencies, one is after from the memory back to the node office next to the request character for the pulse dialing another different one Transmit request character for code selection. The tone code receiver is then appropriate in this case, in order not to occupy the corrector too long, not assigned to the corrector but to the memory will.

Claims (4)

Claims ·. 1.Circuit arrangement for self-dialing long-distance traffic in a telephone system with several star-shaped network groups, the network group centers of which are connected to each other for a connection in a sequence of ascending and descending order (terminal offices, node offices, main offices, central offices) and their node offices through a path over the entire Network group center points prescribing target code number can be achieved (code number path), however, if necessary, neighboring network group center points can also be directly connected to one another by cross-connections, bypassing the code number path, in which central memory with these assigned over-central correctors are provided in the nodal offices, main offices and central offices, and in which in the target codes are transmitted differently to certain connection sections, namely by pulse trains or in coded form, preferably as a multi-frequency code, characterized in that the with ei Corrector (Umw) equipped with a code receiver (CE) is requested from the memory (Sp) occupied by a calling connection and the recorded frequency code in direction markings for the setting sets (ES) of the directional selector (I RW, II RW) and in a direct current code for control of the memory for further connection establishment in the long-distance dialing network (program) and for entering the code via output lines (I ... XV) in the memory relays provided for this purpose (Zl ..., Hl ..., Kl ...) of the memory, while When the target code is recorded in the form of a series of pulses, it is stored in the memory in the same digit memory relay in a direct current code and sent via the same output lines as a direct current code to the corrector, which in turn converts it into a direct current code to control the specified program of the connection paths and in directional markings for the setting sets the direction selector converts. 2. Circuit arrangement according to claim 1, characterized in that the first request from the occupied memory to the corrector takes place depending on a broadband receiver (BE) evaluating a multiple frequency code present on the calling line in the memory and depending on the connection of the setting set of an occupied direction selector, whereupon the memory connects the calling line to the code receiver (CE) of the corrector. 3. Circuit arrangement according to claim 1, characterized in that the first request on the part of the occupied memory to the corrector immediately and when a multi-frequency code arrives in the corrector whose evaluation in the memory the otherwise taking place transmission of a request character backwards to upstream office for the transmission of the key figures in pulse form prevented. 4. Circuit arrangement according to claim 1, characterized in that the occupied memory immediately sends a request character backwards to the upstream office and that in the case If the code number is missing in the form of a pulse after a certain time, a setting block is switched on and then the corrector is queried from the memory. 1 sheet of drawings ® 909 768/91 3.60