DE861266C - Circuit arrangement for telephone systems with relay selectors - Google Patents

Description

Circuit arrangement for telephone systems with relay selectors The invention refers to telephone systems with relay dialers. In this regard are already two types of systems. become known. With one kind, those of one serve Reaching the calling subscriber via a free connection path, as a relay dialer trained, connecting devices. only for the inclusion of the desired participants characteristic current surges, to by correspondingly influencing clutch relays of the desired subscriber, bypassing the relay selector, to a special one To switch on the speech path on which the calling subscriber is already located. As a result of this Connection of the desired participant to a speech channel with which the calling subscriber is connected, special precautions must be taken to a ringing current transmission that cannot be switched off by the calling subscriber to the desired participants to enable. In the case of normal ringing current transmission would namely the ringing current can be switched off already through the loop of the calling subscriber. This special ringing current transmission then requires specially trained subscriber stations and also a larger relay effort.

In the case of the second type of systems, adjustment and speech paths are not available separated from each other, rather the connecting devices remain in the Speech channel lie, so that the connection path between the calling and desired subscriber via the contacts of these connecting devices designed as relay selectors runs. In some systems of this type z. B. -that by dialing the number influenced digit relays in the connecting device - as coupling relays used, so that so many pairs of speech wires go off the connection device, can be selected as participants, while in other systems, in which the number bursts of. the connection device via special wires to the individual digit relays located at the subscriber interfaces that simultaneously serve as coupling relays, are transmitted, for everyone, participants and for everyone Connection path two such digit relays are provided. Also go for that Even and just numbered participants still had separate pairs of speech wires from the Connection device in order to have a temporary coupling while dialing the number two digit-mea3i-g to one @ to @ of the following participants. The interconnection both speech wire pairs is only brought about after the number has been dialed.

The object of the present invention is now to provide a comparison with these To create arrangements simple Re- @ aiswählersystem with less relay effort. This is achieved in that each participant except one for call generation device serving only one connection device (outgoing or incoming) characteristic relay and for connecting a free connection device Establishment of outgoing connections for each connection device a coupling relay is assigned, which also when establishing incoming connections to this Participant takes effect and informs him of his contacts and. Contacts of the marking the connection direction assigned relay with, one. from a connector coming, for; connects all participants with a common pair of speech wires. Through the Provides identification of the desired subscriber within the connection device the arrangement according to the invention the possibility in a simple manner from the Relay dialer system outgoing connections by setting the connection devices accordingly to manufacture.

By avoiding separate adjustment and speech paths according to the invention is achieved the advantage that normal subscriber stations can be used, the call can be sent in the usual way, and an independent feed of the calling and desired subscriber is possible.

In Fig. I, a relay selector system according to the present invention is shown. Two subscribers Troc 3 and Tn 9 are shown, which can reach a free of three connection devices by means of a relay arrangement: Of these three connection devices, only one connection device VE 2 is shown in FIG for all subscribers of the relay dialer system, while the identification of the desired subscriber is carried out by a relay group that records the number bursts of a calling subscriber via a contact pyramid. From. the connection device VE z also go from two connection paths a i'-b i'-ci 'and a 2'-b 2 -'- c 2' to a higher-level office in order to make subscribers connected to this attainable. To establish connections that arrive from the higher-level office, the same connection devices of the relay selector system via connecting lines (e.g. a 2 "-b 2" -c 2 ") are accessible from this higher-order office via relay selector, not shown here made.

In Fig. 2 a section from a subscriber circuit is shown, which enables further relay savings.

First of all, Fig. I will be explained: lifts z. If, for example, the subscriber Tn3 picks up his receiver, the relay R 3 is excited in the usual manner, which can be readily seen from FIG. 1, via the subscriber loop. By closing the contact 37r3, the calling subscriber is blocked because this contact applies a + potential via the windings III of the relays T 13, T 23 and T 33 to the identification wires of this subscriber arriving from the individual connecting devices. By closing the contacts 47r3, 50r3 and 55r3, the windings I and II of the relays T 13, T23 and T 33 are connected to the a-wires leading to the individual connecting devices. Is z. If, for example, the connection device VE 2 shown is free, the relay T23 is excited via the wire c2 in the following circuit: -, Wi9, 48t, 3, 50r3. T231 and II, 53c3, c2, ioia2, io7h32, io8U2, iogo2, A2III, -f-. In this circuit the relays speak T: 23; and A2. By opening the contacts q. t 23 and 1 3 t 23, the call circuit for "the relay R3 is de-energized after the relay T23 via the contact 52t23 independent of the contact 50r3 with its winding II in a holding circuit via the wire c: 2. By closing the , Contact 62t23 a circuit is prepared for influencing the counter Z 3. After closing the contacts 41t2-3 and 44t2,3, the relay A: 2 - with its windings I and II is kept excited via the subscriber loop; while meanwhile As a result of the excitation of relay A2, relay C: 2 after opening of contact ioi a2 in the excitation circuit of winding III, relay A2 is excited. After contact io6c2 has been closed, the holding circuit for relays T23 and C2 runs via this contact.- After closing of the contact 1 50 c 2, the relay H 32 is excited.

If the calling subscriber Tza3 wishes to establish a connection with the subscriber Tng, he sends out nine power pulses by actuating his dial. During this series of current impulses, the relay T12 is excited as a result of the cancellation of the short circuit of its winding III at the contact io2, a2; In addition, the relay U2 is excited via its winding II after closing -the contact 98v2. When relay A2 is de-energized for the first time during the impulse transmission, a circuit for relay H 12 is established via -, H 12, 152h 2,2, 1i5 (5 a 2r, 156v 2, 15702, 150C2, -I-. The relay Hie responds in this circuit and, by closing contact 148 h 12, prepares a holding circuit for itself and an excitation circuit for winding I of relay H2-2. After contact 145 h 12 has opened , this speaks via contact 14'3 h 32 ' Relay H42 switched on; it is held by its windings I and II. Since relay: A2 responds again when the first current impulse ends, i.e. contact 1154a 2 is closed again, relay H 12 is held and relay H22 excited via its winding I. This circuit runs over-, H112, 1-54a2, H221, 148h12, 1 56 VZ, 157o 2, i 5o c 2, -I-. After the contact i 5 i lt 22 is closed, a branch circuit runs via winding II of relay H 22-. Relays H 32 and H4-- remain energized. If relay A 2 b e de-energized again in the second current surge, the relay H 12 is de-energized by opening the contact 154a2. Relay H22, on the other hand, remains in the following circuit: -, H2211, I5Ih22, I55 a2, 156v2, I57o2, I5oC2, +. An Aberregun.g of the relay H 32 occurs by opening the contact 144 h I2 . At the end of the second current impulse, i.e. when relay A2 is re-energized, the holding circuit of relay H22 is disconnected by opening contact i 55a 2, so that this relay is deenergized. If the relay A2 is de-energized with the third current surge, the relay Hi2 is again excited via the contact I52 h 22 by closing the contact i55 a2. By closing contact 148h12, it prepares a holding circuit for itself and an excitation circuit for relay H22. After contact 145 h 12 is opened, relay H42 is de-excited. If the relay A2 responds again after the end of the third current impulse, then after the contact I54 a 2 has closed, the relay H12 is held via this contact, with the relay H22 being energized via the winding I. The relay H22 also switches on its winding II via contact 151 h22. If the relay A2 is de-energized again in the fourth current impulse, the relay H i: 2 is deenergized by opening the contact 154a2. By closing the contact 147h I2 , the relay H 52 responds via its winding I; it holds itself with its winding II via the contact i4oh52. Relay H 32 is energized by closing contact 1451z I2. Now only the relays H 22, H 32 and: 11 52 are energized. Relay A2 repeats. When the fourth current surge is terminated again, the relay H 22 is de-energized again by opening the contact 155 a2. If the relay A 2 is de-energized with the fifth current impulse, the relay H i2 responds again after the contact 1 55 a2- is closed. By closing the contact 148h 12, it prepares a hold circuit for itself and an excitation circuit for the relay H 22. By closing this contact 144h 12, the winding I of the relay H 42 is switched on, so that this relay responds. By closing the contact 141 h42 , it also switches on its winding II. If the relay A2 responds again after the end of the fifth current impulse, then after the contact 154a2 is closed, the relay Hie is activated via this. Contact with excitation of relay H: 22- held via winding I. The relay H 22 also switches on its winding II via the contact i5ih22. If the relay A2 is de-energized with the sixth current surge, then by opening the contact 154a2 of the relay H 12 de-excitation occurs. After opening the contact 144h 12, the relay H32 is de-energized. The relay H42 'holds itself through its windings I and II. If the relay A: 2 responds again after the sixth current impulse has ended, the relay H22 is de-energized by opening the contact 155a2. This does not affect the excitation of relays H42 and H52. If the relay A2 is de-energized with the seventh current surge, the contact closes. 155a2 the relay H i: 2 again for excitation. By closing contact 148h I2, it prepares a hold circuit for itself and an excitation circuit for relay 1-12--. After opening this contact 145 h i2, the relay H42 is de-energized. The relay H 62 is energized via -, H.62, 138h 32, v3-9, h 13, 14oh 52, 15o c 2, -h. If the relay A 2 responds again after the seventh current impulse has ended, the relay H12 is held via this contact with the relay H22 being energized via the winding I after the contact 154a2 has closed. The relay H22 also switches on its winding II via contact 151 h22. If the relay A2 is deenergized at the eighth current impulse, the relay H12 is deenergized by opening the contact 154a2. The relay H22 holds itself with its winding II via the contact 155a2. When contact 145 h I2 is closed, relay H32 is excited. The excitation of relays H5-- and H62 is maintained. If the relay A 2 responds again at the end of the eighth current impulse, the relay H 22 is de-energized by opening the contact 1 5 5 a 2. With the ninth, current surge, the relay H 12 is excited by closing the contact 155a 2. By closing contact 148h12, it prepares a hold circuit for itself and an excitation circuit for relay H 22. When contact 145 h I2 is opened, relay H42 is switched on. Its windings I and 1I are placed in a holding circuit via contacts 14i h42 and 143h32. If relay A2 responds again at the end of the last current impulse, relay H: 2,2- is excited. The relay H 12 continues as well as the relays H52 and H62. Relay H42 also remains energized. According to this, the relays H i: 2, H22, H32, Hq.2, H52 and H62 are energized after nine current surges have been transmitted. Since the relay h2 excited during the current impulse, which also caused the relay U2 to excite, is de-energized at the end of the series of impulses, as long as the relay U2 damped by the capacitor K is still excited, the following circuit is established: -, Wi 1 0, 75 t i, 9, 79 t: 29, 83 t 39, C 9 I and II, T 29 11I, c 29, 174 lt 62, 1701'5: 2, 168, h4: 2, 172h22, P 2 I, 1I, I62 , lt 2, 161v2, 17 (C2, +. In this circuit the relays Cg, T 29 and P2 are energized. Since now the contacts 24 c 9 and 33 cg or 23 t 29 and 32t29 . are closed, the subscriber Tzt g is connected to the pair of speech wires a2-b2, which is common for all subscribers and goes out from the occupied prevention device VE 2. When the contact 177P2 closes , the relay P: 2 with its winding I is connected independently of the contact 162 at 2 in a hold circuit. The relay U2 is de-energized in the meantime. Its winding I is now temporarily over the sub breaker Un excited and causes the ringing current to be sent to the desired subscriber T day via contact 113u: 2. This circuit goes through -, 113 u 2, B2I, a2, 24c9, 23t29, 19t19, Tn9, 28t19, 32t29, 33 c 9, b 2, B 2 1I, +. If the desired subscriber answers, relay B2 in this circuit is excited and, by closing contact 135 b2, excites relay Z2, which is placed in a hold circuit via contact 136z2. Opening contact 133z 2 prevents further excitation of relay U: 2 and thus further ringing. After the contacts iiob 2 and 114b2 have been closed, the calling subscriber Tn 3 is connected to the desired subscriber Tng. The subscriber Tn3 is fed via the relay A2 and the subscriber Tit 9 via the relay B 2.

When both participants hang up after the end of the call, relays A 2 and B 2 are de-energized. The relay C2 is brought to aberration by a short circuit via the contact ioi a2 and caused by closing the contact io5c2. influencing the counter Z3 of the an-. calling party via -, W i g, 57c3, Z3, 62t23, 104z2, io5c2, +. During the counting, the connection establishment (T2-3) is held for some time via contacts 98v2 and 96o: 2. The de-energization of the remaining relays is brought about by the de-energized relay C2.

If the calling subscriber Tn 3 wishes to establish an outgoing connection to the higher-level office, he must bring ten power pulses to the outside. Nach13zendigung.die ser current impulse series is de-energized relay H22, while relays Hq.2 and H62 are energized, so that if the outgoing connection line that can be occupied via wire ci 'is free, relays P 2 in a circuit running over this wire and D 2 come to excitement, so the pair of speech wires is switched through to the speech wires ai 'and bi' after the contacts 123d2 and 129d2 have been closed. If, on the other hand, this connection line is occupied, a circuit is established for relay R2 which, by closing contact 188r2, switches the test circuit to wire c2 ', so that when this connection line is free, relays P: 2 via this circuit and D 2 come to succession. As a result of the closing of contacts 125r2 and 131r2, the pair of speech wires is switched through to wires a2 'and b2'. The desired connection can be established in the usual manner via this connecting line by the current surge transmission that now follows (intermittent closing of the contact 126a2).

If the connection device VE2 is occupied by a higher-order office, then after setting one not shown here takes place. Relay selector this assignment via wire c: 2, ", so that in this circuit, apart from relay A2, relay F2 responds. When contacts 94f 2 and 'ioo f 2 are closed, the incoming speech wires a: 2"' and b2 The windings I and II of the: Relay A2 are kept energized via the bridge consisting of the contacts gi'e2 and 92 f 2 and: the resistor Wi i If the winding II of the relay E2 is influenced accordingly via the speech wire u, 2 ", the relay A 2 is actuated in a corresponding manner as a result of the intermittent opening of the contact 91 e2. The connection device is set in a manner corresponding to that described when the subscriber Tn3 is called, in order to identify the desired subscriber via the contact pyramid. The further connection setup is readily apparent from FIG.

Should a participant call, e.g. B. Tn3, if there is no free connection device, the relay C 3 is excited via -, YIJi 9, 48t 13, 51 t 23, 58t 33, 5-Ir 3, C 3 11, 37Y3 +. The calling subscriber is switched off by opening the corresponding contacts of relay C 3.

2 shows a section of a subscriber circuit which differs from the subscriber circuit of FIG. are reduced in number in that they are arranged in front of the t-contacts used for connection to the pairs of speech wires of the individual connection devices. The call circuit also branches off behind the c-contacts, whereby the t-contacts of its chain also serve to connect a free connection device. Such a selection is made in the manner shown in FIG. The relevant circuits are therefore not reproduced here. The circuits for identifying a desired participant are not repeated either, since they correspond to FIG. When an outgoing connection is established, the relay Rn is excited in the usual way when the subscriber calls; in the manner shown in FIG. i, by energizing the corresponding relay T in or T 2 n or T 3 n, the calling subscriber is switched through via contacts i4. t i n-20 t i n or z6t2ia-22t2n or i8t3n-2q.t3n onto the corresponding pair of speech wires.

To establish an incoming connection to the subscriber Tn, one of the relays T in or T 2 n or T 3 ′ i corresponding to the connection device used is switched via one of the identification wires c i n or c2 n or c 3, n. actuated, whereby the relay Cn assigned to the subscriber Tn is simultaneously excited and the subscriber switches to the incoming speech wire pair via the contacts 2cia and iacn, with which the calling subscriber is connected.

A calling subscriber can be switched off when the line is busy Carry out all connection devices as well

Claims (3)

PATEN TANSPRLCIIZ: i. Circuit arrangement for telephone systems with relay dialers, characterized in that each subscriber, in addition to a device used to generate a call, has only one relay indicating the connection direction (outgoing or incoming) and a coupling relay is assigned to each connection device for switching a free connection device when making outgoing connections, which is also assigned when making incoming connections to this subscriber takes effect and connects him via his contacts and contacts of the relay assigned to identify the connection direction with a pair of speaking cores coming from a connection device and common to all subscribers. 2. Circuit arrangement according to claim i, characterized in that the clutch relay during manufacture outgoing connections depending on the availability of a connection device and when establishing an incoming connection depending on one in the Connection device for the selection of the desired participant made identification being affected. 3. Circuit arrangement according to claim 2, characterized by that for the production of outgoing connections call devices windings of the dem Subscriber to the coupling relay assigned to each connection device, to the. Connecting devices Switch on leading test leads while establishing incoming connections others wired to the relay assigned to identify the connection direction Windings of these coupling relays on from the existing connection devices coming, the participant corresponding identification wires lie. q .. circuit arrangement according to: claim 3, characterized in that the call devices for establishing outgoing connections are in a call circuit, which is in series Normally closed contacts. Of the individual clutch relays of the relevant participant runs, their corresponding working contacts via working contacts of the .the connection direction identifying relay to the subscriber for the establishment of incoming connections switch on the common pair of speech wires. 5. Circuit arrangement according to claim 3, characterized in that when making outgoing connections the connection a free connection device via in a branch to the call circuit in parallel lying working contacts of the clutch relay takes place. 6. Circuit arrangement according to Claim 3, characterized in that the call facilities for making outgoing Connections are in a call circuit, which has in series rest contacts of the individual clutch relays of the relevant participant runs, their corresponding Make contacts for connecting a free connection device. 7th Circuit arrangement according to Claim 6, characterized in that the for switching of the subscriber to the common pair of speech wires coming from a connection device serving, parallel working contacts when establishing incoming connections via working contacts of the relay indicating the connection direction with the Subscriber with separation of the call circuit by appropriate break contacts connected to this relay. B. Circuit arrangement according to claim 3, characterized characterized that when it is busy all connection devices through the call status of a subscriber via working contacts. of the call facilities and normally closed contacts in series of the clutch relay of this participant an excitation circuit for a relay to switch off the calling subscriber is closed. G. Circuit arrangement according to claim 8, characterized in that the relay is used to identify the Connection direction .Serving relay corresponds. ok Circuit arrangement according to claim 3, characterized in that the connection of a participant during manufacture Incoming connections serving the identification wire is determined by a contact pyramid whose contacts through. one assigned to the connection device used, according to the . Relalsgruppe influenced by number dialing can be controlled. i i. Circuit arrangement according to Claim 10, characterized in that the relay group in addition to auxiliary relays, includes two clock relay groups each with two relays, each of which a relay has contacts, which together with the contacts of the auxiliary relays the Form a contact pyramid. 12. Circuit arrangement according to claim. io, characterized .that apart from the identification cores serving for the subscriber connection also for the Establishment of connections to other telephone systems serving wires available are via which, depending on a test that takes place, the connection one free of several connecting lines to this telephone system will. 13. Circuit arrangement according to claim 1o, characterized in that the Relay group also when making incoming calls from another telephone system Connect the contact pyramid to determine the identification wire of the desired Participant controls.