DE1070239B - Circuit arrangement for FernsprechneibensteUenanlagen with dialer operation and relay coupling fields for the connection establishment - Google Patents

Description

Fruefstoff Kl, 21e3

FEDERAL REPUBLIC OF GERMANY

GERMAN

kl. 21 a ³ 54/10

INTERNAT. KL. H 04IU

PATENT OFFICE

EDITORIAL 1 07O39

S60762VIIIa / 21a ³

ANME LDK DAY: NOVEMBER 28, 1958

NOTICE
THE REGISTRATION
AND ISSUE OF THE
LEGEND: DECEMBER 3, 1959

The invention relates to a circuit arrangement for telephone private branch exchanges rait dialer operation, in which the connections to be established are established via relay switching networks. To establish connections within the private branch exchange, an input coupling field is provided for connecting a calling line to the connection set. The connection set ~~ ΐ5ΐ one. Subscriber identification device assigned, which picks up the dialing current from the calling point and establishes the connection with the desired connection line by controlling the coupling relay of a connection coupler.

A special relay switching network is provided for the connection between a connection line of the private branch exchange and a connection line '15 to another exchange. For connections arriving via the connecting line, the known devices for the transmission of the connecting lines have to provide a special identification and drawing device, by means of which the relays of the switching network for the connecting line are controlled.

The aim of the invention is to simplify the switching means for identifying desired connection points at points calling via a connection line, and this is achieved by switching means of the transmitter of the connection line in the case of a connection between the connection line calling from another determination point and the desired connection line the current surges for identifying the desired connection line are transmitted to the subscriber identification devices of a connection set for connections between connection lines within the exchange and after the desired connection line has been identified, the connection set automatically transmits an incentive to the facilities of the calling connection line, which activates the coupling relay for the desired connection line in the relay switching network of the connection line depending on the connection through the subscriber identification device set of controlled coupling relays of said connection set initiates.

The switching on of the coupling relay of the connecting line is therefore carried out as a function of the by the subscriber identification device controlled coupling relays of a connection set for internal connections. Special identification devices for incoming connections via a connecting line are therefore not required. Particularly It is useful to identify the coupling relay for the required connection line in the coupling field Circuit arrangement for telephone private branch exchanges

with voter operation

and relay fields

for connection establishment

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich, Munich 2, Wittelsbacherplatz 2

Walter Strpbelt and Dipl.-Ing. Dieter Bloßfeldt,

Munich,
have been named as inventors

the connection line for systems in which the calling connection line leads to power surges Establishing the desired connection can be transmitted. The subscriber identifier of the Connection set for internal connections, which also includes the identification of a desired connection line in the case of connections via a calling connection line, initiates in an expedient manner also the identification of the coupling relay of the connection line for a requested connection line, which is switched on after the inquiry connection has been made when the transfer incentive takes effect.

Exemplary embodiments of the invention are shown in the drawings. It is a private branch exchange that is used by electricity supply companies and in which trunk lines are provided between the public switching center and private branch exchange and also long-distance lines connect larger private branch exchanges with one another. 1 shows the input coupler EK, through which calling connection lines are interconnected with the connection set VS. The connection to the is made via the connection coupler VK of the connection set VS.

\ r "- 909 687/94

selected connecting cable. The identification of the respective coupling relay Kl to K 2 of the selected connection line to be switched on is carried out by a subscriber identification device, which is shown in FIG.

3 shows the transmission of an exchange line with an exchange line coupler AK assigned to this line. If an inquiry connection is established via the line 135/136 (FIGS. 3 and 1) with an existing exchange connection, the inquired position is identified by the subscriber identification device of FIG. 2 and the coupling relay of the connection coupler VK in FIG. 1.

4 shows the transmission of an incoming line FL . Selective current surges are inductively transmitted via the connecting line FL. The coupling field FK is used to connect the line FL with the required connection line

. In turn, a query connection is established via the switchover point and the connection line of the desired subscriber, as when an exchange connection is transferred via the exchange coupler AK . connected to the calling trunk AL .

I. Establishing an outgoing exchange connection ¹ according to FIGS. 1, 2 and 3

The subscriber Tn2 wants to establish a connection to the public office. After picking up the handset, the call relay R2 speaks to its line in the loop circuit. It closes the contact Ir2. The contacts 2 r 2, 3r2, 28r2 open.

Is the connection set VS shown, which of calling. Lines is reached via the coupling relay Ke of an input coupler EK and is connected to the respectively selected line by coupling relays of a connecting coupler VK, free, so

intended. The control of the relay des_ coupling 20 speaks the coupling relay Ke 2 of the subscriber line

Tn2 on.

1. +,. . ., 4fr,. . ., 5rf, Ir2, 6t2, 7, lKe2, Ge2, 8 .,., F, 9c ..., -.

The contacts 10 ke 2, 11 £ έ? 2, 12fee2 in Fig. 1 and 13 ke 2 in Fig. 3 close. Closing the last-mentioned contact is currently of no significance.

The responding relay F in circuit 1 opens

connected to wires 18 and 19. The relay A responds in parallel to the winding I of the call relay R 2. The relay Cl is switched on.

2. +, 2Oa, 21 ir, C, -.

The contacts 22 c and 23 c close. The contacts 24 c, 25 c then open. The relay A is thus independent of contacts of the relay F on the wires 18

running holding circuit closed: 3. +, 26c,. . ., 27, UKe 2, 12fc <? 2, IIi? 2, IT2, -.

g g

Field FK is in turn dependent on the control of the subscriber marking device in FIG. 2 and the coupling relay of the connection coupler VK in FIG. 1.

Fig. 5 shows schematically a private branch exchange with direct dialing via the calling office

|| line AL to the required connection line, at

«J to which an inquiry switchover point rü is assigned to the exchange transfer AUe. With an extension

I; connection is that. Contact dw closed, and there 30 the contacts 14 /, 15 / and closes the contacts 16 /.

I is via a free input coupler, e.g. EKl, the windings I and II of the relay A are thereby

I the connection set VSl with the subscriber identification

|: Drawing facility ZIE occupied. The subscriber identification device ZIE controls that in question
incoming coupling relays of the line coupler LK 1. 35
After this marking is then accordingly
the technology in Fig. 1, 2 and 4 automatically an incentive
transferred to the office transfer AUe , by the
that assigned to the desired connection point
Coupling relay of the exchange coupler AK is switched on. 40 and 19 turned on. The connection path via the input coupler EKl, via the winding II of the coupling relay Ke 2 ver connection set VSl and line coupler LKl is through contact 26c
Approved. Is there an exchange connection via the
Line AL, the individual subscriber of the
Exchange connection path to switch to reverse 45
prompt a question. The switch is turned back into the working position. The production of the
Inquiry path via the input coupler EK1,
Connection set VSL and line coupler LKl. the
Control of the latter is again from the participant - 5 ° windings in the supply circuit. Depending on the contact marking device ZIE. Circuit 1 is interrupted for 9c and 6i2. Relay F taking over an exchange connection, a transfer is dropped and sets its changeover contacts 14 // 16 / and an incentive to the exchange transmission AUe. In 15 // 17 / back to the rest position. By contact 34c depending on the subscriber identification by the negative potential is applied to the next connection set device ZIE in connection with the line 55.

coupler LKl is then the control of the coupling The connection set is a relay group (Fig. 2)

Relay of the exchange coupler AK causes the now assigned, which by number current surges in the queried connection line is transferred to the exchange and connects through control of a contact pyramid transmission AUe. The inquiry and transfer (Fig. 1) the excitation circuit for the selected technology corresponds to the version in Fig. 1, 2 and 3. 60 telephone number corresponding coupling relay prepared. For the private branch exchanges with direct dialing before the establishment of an outgoing exchange

Subscriber to the desired extension
According to Fig. 5, the officer must also make an office call
accept, if the subscriber does not have the connection number of the desired extension 65 Zr 4. With the help of these numeric relays, the white. If this call shown the extension officer embodiment shown five Teilnehmerleituna "the operation telephone is gen Bed / Fe and the digit to be selected. Turned to trunk In anüber contact as to the transmitter AUe the anrufen- those training and connection of the relay group. For forwarding a larger number of lines can also be selected. The incoming office call by the officer will be 7 °.

The relay T2 responds. Open contacts 29 12, 30i2 and 31 ί 2. Contacts 32 12, 33 ί 2 close. The call bridge is switched off. In addition, the subscriber line Tn 2 is blocked at the connection coupler VK. The relay A is now with its two

binding is explained, the control of the relay group (Fig. 2) is described.

The relay group includes the digit relays ZrI bis

Relay A drops out whenever the line loop of the calling subscriber is interrupted by the impulse transmitter. At the first drop, the control relay V (Fig. 1) responds:; - ■

4. +, 35 ^ 36 ^, 370, V ₁ -.

Relay V remains activated as a result of a delayed dropout while a series of current impulses is being picked up. It opens contact 38 ν and thus prevents a test during the current surge absorption.

The relay A transmits the current surges to a relay group in Fig. 2, which is provided to identify the desired connection line.

The digit relays Zr 1 to Zr 4 of the relay group in FIG. 2 are made to respond by the discharge current of a capacitor Ko. The capacitor is charged in the rest position of the connection set:

5. -, Ko, 39a, AOv, +.

After the relay A responds and the contact 39 α opens, the positive potential remains connected to the capacitor Ko via the contact 41 α . If, as a result of the first drop in relay A, contact 41 α opens, contact 39 α and then contact 42? 7 close, relay Zr 4 responds:

6. -, Ko, 39a, 42 v, 43 zr 3, 44 sr I, 45 zr 2, 46sr3, IZr4, -.

By closing contact 47 sr4, the low resistance 48 is placed parallel to winding I Zr 4, so that this relay receives some drop-out delay and the capacitor Ko is fully discharged. A holding circuit is closed by contact 49 zr 4:

54 sr 2, the holding circuit is opened via winding II of the relay Zrl. A holding circuit is established via the winding IIZr 2 through contact 68sr2.

60zr1

10. +, 50c, ---, 68 zr2, WZrI, -.
53zr3

The contacts 69 sr 2, 70sr2 are still closed and in the contact pyramid (Fig. 1) the contacts 71 sr 2, 72 sr 2. The contacts 45 sr 2 (Fig. 2) and in the contact pyramid 73 zr 2 are opened, 74sr2 (Fig. 1). Relay Zrl drops out. The relays Zr 4 and Zr 2 are addressed. The excitation circuit for the coupling relay if 2 is prepared.

The relay Zr 3 responds to the third current impulse:

11. -, Ko, 39a, 42v,

69zr2

, \ _Z r3, -.

By opening contact 52 sr 3 and closing contact 75 zr 3, the holding circuit for relay Zr3. manufactured: .

12. +, 50c, 51 sr 1.75 sr3, HZr3, -.

Relay Zr4 continues to be held parallel to winding II zr 3. The contacts 76 zr 3.78 sr 3, 79 zr 3 and in the contact pyramid (Fig. 1) the contact 80 sr 3 are still closed. The contacts 43sr3, 46sr3, 81sr3 and 53sr3 are opened. Relay Zr2 drops out after contact 53 sr3 is opened. The relays Zr4 and Zr 3 are addressed. The excitation circuit for the coupling relay K 3 is prepared. When relay A drops for the fourth time, relay Zrl responds:

A9zrA,

7. -h 50c,

52zr3

The relay ZrI is switched on:

8. +, 50c, 53sr3, 54sr2, 55sr4, IIZrI, -.

Contact 56 zrl bridges contact 55 zr 4. By opening contact 57 zr 1, the parallel connection of resistor 48 to winding I Zr 4 is canceled. The resistor 48 is placed parallel to the winding I Zr 1 through contact 58 sr I. The contacts 44.gr 1, 51 sr I continue to open. The contacts 59 zrl, 60zrl close. Since the capacitor Ko is practically discharged by the discharge through the winding I Zr 4 and the resistor 48, the relay Zr 2 cannot respond after the contact 59.SrI is closed while the contact 39 α is still closed .

In the contact pyramid (Fig. 1) the relays Zr4 and Zrl have opened the contacts 61 sr4, 62sr4 and the contacts 63 zr 4, 64sr4, 65zrl, 66srI closed. The response of the relay Kl is thus prepared and would take place after the relay V dropped out if no further current surge were received.

After the end of the first current impulse, relay A responds again; the capacitor is charged. When relay A drops for the second time, relay Zr 2 responds to the capacitor discharge current:

9. -, Ko, 39a, 42w, 43sr3, 59srl, IZr2, -.

Resistor 48 is placed parallel to winding IZr2 through contact 67sr2. The capacitor Ko is fully discharged. By opening the contact

13. -, Ko, 39a,
IZrI, -.

, 79sr3, 45sr2, 76sr3, 82sr4,

Its winding II is connected to a holding circuit via its contacts 60sr 1 and 56srl. By opening the contact 51 zr 1, the holding circuit 12 is interrupted. The relays Zr3 and Zr4 drop out. Only the relay Zrl is addressed. The response circuit for the coupling relay K 4 running over the contacts 66 zr 1, 74 zr 2 and 62sr4 of the contact pyramid (FIG. 1) is prepared.

The relay Zr 2 responds to the fifth current impulse via circuit 9 and closes its holding circuit 10. The excitation circuit for the coupling relay K5 is prepared via the contacts 72 zr2 and 62sr4. The holding circuit via the winding II of the relay Zrl is opened by contact 54 zr 2. Relay Zrl drops out.

The next time relay A drops out, relay Zr 3 responds via circuit 11 and closes its holding circuit 12. Contact 80 zr 3 prepares the excitation circuit for coupling relay K 6 via contact 61 zr 4.

To establish an outgoing exchange connection, the calling subscriber subscriber 2 has to dial the number »!«. After receiving the one current surge in the relay group, the relays Zr 4 and Zrl are addressed as described. Since a "second current surge no longer occurs, the control relay V drops out and prepares the test circuit through contact 38 z /. If the switching arm 85 of a test distributor PV comes to contact 86, then speak if a free exchange line is available Relay P and Kl on.

For simplicity, only one trunk is in

3 shown. If there is more than one trunk provided in a known manner the free in each case.

14. - (Fig. 1), 85, 86, 38 v, IP, 64 sr 4, 73 zr 2, 65zrl, GvI, IKl, 87, 88 an (Fig. 3), +.

The following holding circuit is established:

15. + (Fig. 1), 89c, 90 tr, 91p, IIP, IIKl, 92fei,

93, An (Fig. 3), -.

Relay An initiates the coupling of the trunk line AL with the subscriber line Tn 2.

The relay Ba is addressed in the exchange line AL (Fig. 3). The relay Ba, which is switched off when the trunk line is busy, is switched on after it has been activated by a thermal relay (not shown) through contact 94 th. Since contact 95 where 1 is closed, relay Ba responds:

16. +, 95val, 94: th, Ba, -.

It lies in a holding circuit:

97s

98ba, Ba, -.

Contact 99 ba is closed. After dialing the exchange code, the relays Ke 2 (Fig. 1) in the input coupler EK, K1 in the output coupler VK and on the exchange line the relays An and Ba are addressed when the exchange line is free. As a result, an excitation circuit is established for the coupling relay Kai of the exchange coupler AK which interconnects the subscriber line Tn2 with the exchange line.

18. + (Fig. 3), 100a &, 101 an, ITr, 102 fei ,. 13 fee 2 /

IKa2, Ga2, 99ba, ..., -.

By closing the contacts 103ßa2 and 104ka2

Relays X and VS ^{1 are placed} parallel to relay A (Fig. 1). Tr relay opens the circuit 2 for relay C, which are separated 26 c positive potential of the wire 27 at its waste by opening of contact in the connection set VS. The following holding circuit is now effective:

19. + (Fig. 3),. '. . , 107 ba, 168ua, 108vo2, Ca, UKaI ₁ 110fea2, 111, II # 2 (Fig. 1), IT2, -. When the contact 26 c in the connection set VS (Fig. 1) is opened, relay Ke 2 drops out. The relay Tr has interrupted the circuit 15 via the windings II P and II Kl when responding to contact 90 tr. These relays also drop out. The relay C has also interrupted the holding circuits of energized numeric relays of the relay group (Fig. 2) by opening the contact 50 c. All energized relays drop out. The connection set VS and the to this

ίο belonging couplers EK and VK are activated. In the usual way, the subscriber Tn2 can set voters in the office reached via the exchange line AL by giving a current impulse. When the bridge ^{relay 5 drops, 1} speaks as a result of the first current surge

relay Va2 to:

20. +, 97j, ΙΙΊ, ναΙ, IVa2, IIVa2, -.

Relay Va2 receives a va 2 drop-out delay due to a short circuit in winding II via contact 114. The choke DrI is short-circuited by contact 115z / o2 while the current is being passed on.

II. Establishing a consultation call

Any participant, for example participant (TnS), is connected to the exchange line AL from the exchange coupler AK via contacts (not shown) of its coupling relay KaZ. If this subscriber wants to establish a consultation call with subscriber Tn 2 , then

he presses the earth button at his station. In the exchange line, the differential relay X responds and switches on the relay Z:

21. +, '120co, 121jtr, IZ, 122 y, 123, -.

Relay Z closes contact 126.3. As long as contact 121 χ is closed, no further switching process is initiated. Via contact 124 ζ the resistor 125 is placed as a holding bridge between the wires of the exchange line. If the subscriber releases the earth button and relay X drops out, relay F responds after contact 121 χ has opened:

22. +, 120 ca, IY, 126z, HZ, IZ, 122 y, 123, -.

Relay Ca bridges contact 107 ba with contact 115 ca. Relay 6 "responds in the supply circuit of subscriber Tn 2. When contact 97.? Opens, since contact 96 ca is also open, relay Ba drops out and thus marks the trunk line as occupied. Relay X is a differential relay. Contact 105 s is turned on, the relay VaI, inter alia, with contact 109 contact 108 where the ν al bridged .2. It further includes the contact 106 val, thereby enabling the calling via the trunk line aL. by closing of the contact s is an 11.2 DC bridge established between the wires of the exchange line and a call forwarded to the exchange. Relay Y opens contact 122 y and closes contact I273;, creating a new circuit for the two relays Y and Z:

■ 23. +, 120ca, IY, 126z, UZ, 127 'y, HY, 123, -.

Contact 128 y bridged 'contact 124g. By opening contacts 129 y, 13Oy and closing contacts 131 y, 1323 ;, 1333>, the inquiry switchover is carried out. The inquiry line RL is connected to the line to the inquiring participant. In the subscriber circuit TS , the call relay RR addresses the consultation line:

24. +,

(Fig. 1) 146, mtrt, 135

(Fig. 3) 149ab, IIDrI, HUa, 141va2

(Fig. 3), DrI, 112s, 131 y, (Fig. 1) 136, XXIrt, IRR

(Fig. 3) T38va2, IUa, 139m «, IDr2, rectifier, 140αδ

In this circuit only the relay RR speaks. Let us assume that the illustrated connection set VS responds, but not the differential relay UA. Contact 4 rr is free. The coupling relay KrI speaks in one that opens, contact 141 rr closes. The corresponding coupler of a free connection set in the input circuit 1 for the coupling relay Ke 2 is connected to the circuit. The contacts 142 krI ₁ 143krl, pel relay of the feedback line RL responds. Closed 70 144 kr 1 . In the connection sentence, speak how

9 10

described earlier, the '.- relays Ä and C contact 121 x one after the other, so relay Y also drops out and switches

at. The holding circuit for the coupling relay Kr 1, in the inquiring participant back to the official

to which the relay RT responds and the call line returns,

relay RR is held in the following way:. 'γγγ U 1- σ. '

25. + (Fig. 1), 26c, ..., 27, IIKrI, 144 kr 1, 150, ⁵ '. the exchange connection to subscriber Tn2

, 133y (Fig. 3), 151, HRR (Fig. I), IRT, -... 'ν V

If the gluer 1 n2 wants the exchange connection

By opening the contacts 137 rt and 134 rt will take over, so he presses the earth button on his

the call bridge (I RR, 146 [Fig. I]) is shut down. Station. The difference lying on the inquiry line ^

Contact 152 red opens, contact 153 red closes. Plus- io renzrelais UA (Fig. 3) speaks due to the short-

potential is now applied via the contacts 141 rr and the end of its winding II. That the reassignment

153ri on the relay initiating the changeover contact of the call relay Um responds to:

the next connecting lead leading wire. _on , _Λ ~ _η \, _{C / 1 rr} ,

T ^ - T ^ j. ι u ■ j, - ^ - j. λ j. λ ■ r ο λ ο 29. +, 120ca, 164 ua, I Um, -.

The chain connection of contacts 4rr ... 5r3, Ir2 ....

prevents that when two calls are made at the same time, the common AB blocking relay is activated.

or more lines switched to the same one at the same time:

Connection set can be switched through. In the ge in 4- ικ «'κκ, ™ t ^ r tt ^ ib"

_T,, . . , -rr ν λ ιλλλ ^ 0. τ, loo y, 166 et al., YAB, HAB, -.
called contact chain is the contact 4 rr 1 141 rr from

Call relay of the inquiry line RL arranged by short-circuiting the winding I via contact

that a call to the Inquiry Access \ ^r or a ao 107 receives from AB relay drop-out delay. Contact

at the same time on a subscriber line incoming 100 from is opened. This prevents

Call is being handled. at the same time as the transfer of an exchange connection

The loop for relay ^ (Fig. 1) from the connection to the connection of a free exchange line to the approach and UA (Fig. 3) to the inquiry switchover end line of an exchange line producing an exchange line is formed via the throttle DrI. 25 is initiated by the participant. Through contact Only relay A is addressed, but not 168 and others the relay Ca and the non-differential relay Ua. . provided coupling relays of the. so far with the exchange line

Since a query connection to the subscriber Tn2 connected subscriber (Tn 3) is interrupted. the

is to be established, the two of the return relays Ca, Ka3 and then S drop off. For the

The 30 relays Um and Y , a holding circuit is closed:

In the manner described corresponds relay group (Fig. 2) 96ca HTo

Speaking circuit 5 to 10 controlled. That at the 31st +, --—, 169ba, VJOwm,, -.

first drop of the bridge relay 5 "responsive control 97s III Y

relay Va 2 (circuit 20) switches the relay Ua through contact 171, among other things, is the short-circuit winding

by opening the contacts 138wa2 and 147 va2 wah- 35 III Ua switched on. The relay Ua receives waste

rend of current impulse transmission, which is achieved by means of the delay. Is, inter alia, by opening the contact 172, a

bar 112.? takes place, from. Assignment in the time in which the subscriber Tn2 the

After the end of the impulse, holding down the earth button prevents it from falling. The activation

^ Control relays Va2 (Fig. 3) and F. (Fig. 1). The holding winding III Y prevents activation

Relay Vl in Fig. 1, the relay Z is switched on. 40 of the trunk line AL, because the contact 128 y remains

26 + (Fig ί) 180, sr2 181 w 182 * Z - closed. The relay Um has by closing the

'' ¥ >> · .- Contacts 173 around and 174 around the transfer of the official

If the subscriber line Tn2 is free, the connection speaks prepared. The contact 166ua will

Test relay P in series with the coupling relay K 2 of the bridged by contact 175,: ''; _ '. . "

Connection coupler VK on: 45 If the subscriber Tn 2 releases the earth button, it drops

27. - (Fig. 1), 85, 86, 38z ;, IP, 64 «-4, 71 zr2, Gv2, relay [/ α delayed <sL · It is then the circuit IK2 3r2 31 i2 + coupling relay λο2 of the Exchange connection

accepting participant Tn2 closed. This

Via the contacts 160 k 2, 161 k 2, 162 £ .2 the circuit takes place in contrast to the circuit

the connection to the subscriber line Tn2. It is 50 18 for an outgoing trunk connection

the following holding circuit established: via a contact 176 £ 2 (Fig. 3) of the coupling relay

28 +, 89c, 90 tr, 91p, IIP, IIK2, 162 k2, 163, * £ combining couplers in the UK and a contact IIi 2 IT2 - '' ■ '■' ■ ^{In the} circuit 25 excited coupling relays

KrI the calling Rückfragelei tung ^RL:

The relays 2 and T2 respond. The relay P 55 n ₀ , _ _Λ * ο _Λ , _Λ ηΛ _Λι . ₁₇ λ, _{λ 177} >. _πτ,. ,, -.,

i u- 1 ^ 1 -, ν j. ii <ooi .--- j cj. 1 ■ nc λ ^ - +, 178 ν, 174 MW, niua, 177 krl, LLIr, YiOkI,

interrupts the circuit 26 of the -χ ν η r ^ ■ ληί with contact 182 *

τ-> ι ·>? τ j.,! ". .. / T ₁ ι · τ a -ι ^ --U- LKaI, Ga2,. . ., nium, -.

Relay Z. During the release time of relay Z,.

contacts 183p and 1842 the first call. The partial Contacts 103 ka 2, 104 £ a2 include 110fea2, participants Tw2 after its register with the via relay S speaks parallel to the relay A in Verbindie Inquiry Access calling party together 6o Ground Kit VS via the subscriber loop of the subset of switches, transferee Tn2 and puts his contacts into which the inquiring participant will transfer the inquiry work situation. Relay Tr causes the activation to cancel the connection and to switch back to the office of the connection set in the line under Section I, so he presses in the known manner. After the fall of the coupling way again his earth key. Relay X responds and 65 relay K2 of subscriber Tn2 , the holding current closes the windings I Y, HZ circuit for the Koppelfeiais Kai via contact 121a-:. ■ and IZ for short. Relay Z drops out and opens contact ... · '...'. ■ _1f . _Q. ■ - .; _: ■, 126 z. Relay Y is held via its winding II as well as the 33rd _) _ (Fig. 3), 179Wm, 168 ««, .———, Ca, HKß2, contacts 1273) and 121 λγ. Falls on lot 108ϋα2
let the earth button off the relay Z and opens the 70 110ka2, 111, IIi? 2 (Fig. 1), IT2, -. :.

Relay Ca responds. By opening the contact 96 ca, since the contact 97s is already open, the holding circuit 31 is interrupted. The relays Um and Y drop out, then also the relay AB, relay Y lifts when the changeover contacts 1293 '/ 13l3 are removed; and 130 y 1 132 y in the position shown, the inquiry switchover on the exchange line and interrupted by opening the contact 128 3 / the auxiliary bridge via the resistor 125.

Should a further inquiry be necessary, this can be initiated by subscriber Tn 2 in the manner described under Section II.

IV. Incoming connections
via the line FL in FIG. 4

T ~ ^ ~ - The pipeline FL done an inductive \ impulse response. When the line FL is seized at the outgoing end of this line, a temporary seizure pulse is transmitted, which acts on the receiving relay / the transmission in FIG. The relay Rf is switched on by the relay /. It is assumed that the subscriber calling the subscriber via the line FL, the connection line of the subscriber Tn 2 is selected. In this case, the subscriber identifier in FIG. 2 receives two power surges. After these two current surges have expired, the relays Zi? 4 and Zi? 2 switched on. The excitation circuit 17 for the relays P and K2 and the holding circuit 28 for the two relays P and K2 are established. In the latter, the subscriber relays i? 2 and T 2 are switched on. If the relay V of FIG. 1, which is switched on in circuit 4, drops out after the end of the series of current impulses, then relay Z in circuit 26 is switched on temporarily. The temporary activation of the relay Z in turn causes the first call via the contacts 184 £ and 183 p. Furthermore, due to the temporary switching on of the relay Z, negative potential is applied to the line 196 in FIGS. 1 and 4 via the contact 185 ζ and the low-resistance resistor 186. As a result, the reverse winding III of the relay Rf in FIG. 4 is switched on.

41. +, III Rf, 215 rf, line 196 in Figs. 4 and 1, 22 ke 3, 1852, resistor 186, -.

34. +, ..., Ii? /, 203 6 /, 204 ί ", ..., .-.

The relay Rf switches the coupling relay Ke 3 in
Fig. 1 of the input coupler EK . 25 When relay Rf drops out , relay F

35. +, 205 tf (Fig. 4), 206r /, line 195 in Fig. 4 ^{in Fi} S- ⁴ switched on.

and 1, IKeZ, GrZ, line8, F, 9c, ..., -. 42. +, 216fa, F, 217 tf, 218fe, 219s, 22Of /, -.

In the transmission of the line FL in Fig. 4, the relay ^ is switched on by the occupancy pulse and when the relay Rf is energized.

36. +, 207?:, 208 d, 209 \ rf, S, -.

A holding circuit is established for relay 5 ".

37. +, 210 s, 208 d, 209 rf, S, ~.

After the occupancy pulse has ended, there is the following loop circuit for relay A in Fig.l. \. "'..' ■ '

38. +, HA, 25c, .17 /, ... ., Line 19, 188fee3, line 193 in Fig. 1 and 4, 214 c /, 213 s, Df, 212 i, 211 fp, line 192 in Fig. 4 and 1.187fe _e 3, line 18, ... , 16 /, 24c, IA, -.

Relay A switches on relay C in circuit 2. The following holding circuit is established for the coupling relay Ke 3 in FIG. 1 and the relays Tf and Rf in FIG.

39. +, 26 c (Fig. 1) ,. Line 27, II if £ 3, 189 ke 3,

Line .194 in Figures 1 and 4, Tf, HRf, -. .

The following loop flow circuit exists for the bridge relay Ä in FIG. 1:

40. +, II A, 23c, line 19, 188 ke 3, line 193 in FIGS. 1 and 4, 214 c /, 213.?, Df, 212 i, 211 fp, line 192 in FIGS. 4 and 1 , 187 ke 3, line 18, 22c, IA, -. ..

The incoming over the long-distance line FL in Fig. 4 current impulses to identify the desired connection line are picked up by relay 7 and transmitted through contact 212 ί in the circuit 40 to the bridge relay A in FIG. During the series of current impulses, the relay V in the circuit 4 is switched on in FIG. The current surges picked up by the relay A are transmitted to the subscriber identification device of FIG. The relays ZrI to Zr 4 are controlled in accordance with the circuits 5 to 10. The circuit 37 of the relay 5 hr Fig. 4 is interrupted by contact 209 rf . The relay AB (FIG. 4), which is common to all connecting lines, is switched on by the relay F. / »

43.. +, 221 /, AB, -.

The coupling relay FK 2 of the desired connection point Tn2 in the relay coupling network FK of the connecting line FL is now switched on.

44. + FQ, 222ab, 223 /, IFP, IFK2, line 199 in Figs. 4 and 1, 201 fe2, 202.2, 200fei> 3, line 196 in Figs. 1 and 4, 224fe, 225 /, -FQ.

The aforementioned circuit is controlled via a power source FQ that is dependent on the operating voltage of the system. The relay FP in the identification circuit is also switched on and the following blocking circuit is established for the connection line of the subscriber Tn2:

45 + (Fig. 4), 226 // », UFP, IIFK2, 227 / fe2, line 111 in. 4 and 1, Hi? 2, IT2, -.

Relays FP, FK2, R2 and T-2 are kept energized. After the control of the circuits 43, 44 and 45, the delayed relay 5 ″ in FIG. 4 returns the contacts to the rest position. The circuit 42 of the relay F is opened by contact 216 fp . The circuit 43 of the relay AB opened. the excitation circuit 44 of the coupling relays FK 2 and the test relay FP is interrupted by contact 223 /. the relay FP opens with contact 211 fp the loop circuit 40. It turns the relay A of Fig. 1 in. It is the connection set with the input coupler EK and the connection coupler VK . Relay Cf is switched on by relay FP of FIG.

46. +, 22 »fp, 229 d, CF, - '.

By opening contacts 230 c // 214 cf , lines 192/193 are disconnected from line FL. The speech path is switched through via contacts 231 c // 232 cf. For the connection line

of subscriber Tn 2 consists of the following ■ onward call circuit:

47. + (Fig. 4), 233 c /, IAF, 234 / £ 2, line 197 in Fig. 4 and 1, alarm clock of the connection line, line 198 in Fig. I and 4, 235 fk 2, 234 a /, 235 fp, ringing current source RQ.

If the subscriber of the connecting line Tn 2 reports , the relay Af of the ringing circuit is switched on. The following supply circuit is established via the relay Af :

48. +, 233c /, IAf, 234 fk2, line 197 in FIGS. 4 and 1, loop of the connection point, line 198 in FIGS . 1 and 4, 235 fk 2, UAF, 236 af, -.

If the connection via the line FL is terminated, the devices in use can be triggered by hanging up the receiver on the called connection line Tn 2 and thus interrupting the feed circuit 48. The triggering processes known per se are not shown or described in more detail.

Claims (8)

Patent claims: 1. Circuit arrangement for telephone extension systems with dialer operation, in which the connection of a calling extension with a connection line to another exchange and the connection "of the connection line calling from another exchange with the desired connection line is made via a relay switching network, characterized in that a connection between the connecting line (FL) calling from another exchange and the desired connection line (TnZ) the switching means (relays /) of the transmitter of the connection line (FL) the current impulses to identify the desired connection line on the subscriber identification devices (relay group in Fig. 2) of a connection set for connections between connection lines are transmitted within the exchange and after the desired connection line has been identified, the connection set automatically provides an incentive to the facilities (Relay Rf in Fig. 4) of the calling connection line (FL) is transmitted, which activates the coupling relay (FKZ) for the desired connection line (TnZ) , initiates in the relay coupling field of the connection line depending on the coupling relay (KZ) of said connection set controlled by the subscriber identification device of the connection set. 2. Circuit arrangement according to claim 1, characterized in that the call relay (Rf) assigned to this line is switched off by the automatic stimulus from the connection set (VS) for connections between connection lines within the exchange on the facilities of the calling connection line (FL in Fig. 4) and thereby the circuit of the coupling relay (FKZ) of the desired line (TnZ) in the relay coupling field (FK) of the connecting line (FL) is switched on. 3. Circuit arrangement according to claim 1, characterized in that the circuit of the coupling relay (FKZ) for the desired connection line (TnZ) in the relay coupling field (FK) of the connection line (FL) via a contact of the coupling relay controlled by the subscriber identification device (Fig. 2) ( KZ) of the connection set and via a contact (200 ke) of the input coupler (KEZ) which connects the calling connection line (FL) with the connection set (VS in Fig. 1). 4. Circuit arrangement according to claim 1, characterized in that the circuit of the coupling relay (FKZ) for the desired connection line (TnZ) in the relay coupling field (FK) of the connection line (FL) is controlled by a power source (FQ) independent of the operating current of the system. 5. Circuit arrangement nach'Anspruch 1, characterized in that the test circuit for the coupling relay (FKZ) of the desired connection line (Tn Z) in the relay coupling field (FK) of the connection line (FL) is temporarily established via the identification path and the holding winding of the coupling relay (FKZ ) is switched on in the blocking circuit via the subscriber circuit of the desired connection line (TnZ) . 6. Circuit arrangement according to claim 1, characterized in that the subscriber identification device (Fig. 2) and the coupling relays in the relay coupling network (VK) for connections within the switching center, the coupling relays (FKZ) in the relay coupling network (FK) of the connecting line (FL) when via the connecting line (FL) incoming connections and, in the case of inquiry connections, a connection point connected to a connecting line (AL). 7. Circuit arrangement according to claim 1, characterized in that the subscriber identification device (Fig. 2) and the coupling relays in the relay switching network (VK) for connections: within the switching center when dialing a connection point calling via a connection line (FL) to the desired connection line (TnZ ) and mark this connection point in the relay coupling field (FK) of the connection line (FL). 8. A circuit arrangement according to claim 1, characterized in that the subscriber identification device (ZIE in Fig. 5) and the coupling relays in the relay switching network (LK) for connections within the exchange after receiving an office call by the extension officer by rushing the extension officer via the inquiry path of a connection line (AL) are controlled and the desired connection line (TnZ) in the relay coupling eld (AK) of the connecting line (AL) identify. Documents considered: German Patent No. 965 415. In addition 3 sheets of drawings © 909 687/94 11.59