DE680820C - Circuit arrangement for telephone systems with relay selectors - Google Patents

Description

Circuit arrangement for telephone systems with relay selectors The invention relates to a circuit arrangement for telephone systems with relay selectors, in which the subscriber lines by coupling relays with connecting lines different traffic directions are connected and in which the excitation of the clutch relay when connecting the subscriber line to a connection line of a specific Traffic direction. by closing the loop via the subscriber station.

The purpose is to cleanly block the connecting lines of a Traffic direction for all connecting lines crossing these connecting lines carry out so that with further calls in this traffic direction as a result of the Switching off the call potential for all subscribers whose clutch relays do not can address more, but without depriving the connecting cables of the opportunity Connections to the connecting lines of others crossing the connecting lines Get directions of traffic. This is achieved by being busy all connection lines of the particular traffic direction switching means effective which is the call potential for this traffic direction, which is connected to one wire each of the subscriber lines lies, switch off and thus a response to further Coupling relays occupying the connecting lines of the specific traffic direction prevent, however, the connection of connection lines of other traffic directions, which in a known manner by grounding a. Core of the subscriber connection lines is effected in the subscriber station is prevented.

This arrangement also makes it possible that via a connection line, which is connected to a connection line of the blocked direction or which itself caused the blocking with her call, an immediate connection a connection line of the other traffic direction can be carried out.

In arrangements with only one adjustment path, it is easily possible to do so to block consultation connections for other calls while it is being set up. A Another feature of the invention is that when all connecting lines are busy a traffic direction the call circuit of a connection line for a connection in this traffic direction via a self-breaker contact of a blocking relay runs. This arrangement makes it possible to identify the busy status in the simplest possible way of the connecting lines in a certain direction. It goes without saying: that this busy identification can also be used in such systems in where there is only one direction of traffic.

An exemplary embodiment of the invention is shown in the figures, to which, however, it is not restricted. A small relay center is shown in which internal connections are established via the house line HL and external connections via the exchange line AL . Only two subscriber stations are shown, which have the designations Tnl and Tn2. A desired subscriber is stimulated with the help of the relay selector RW, to which 'the selection relays 1, 2, 3, q. etc. are assigned: FIG. 2 shows a special circuit of a line relay of a subscriber, for example subscriber Tni of FIG. While when the connection lines were blocked when the house connection line HL, earth at the line relays R1 and R2 was switched off by opening contacts 24g and: 25g, a buzzer Su is sent to the relay via an interrupter contact su when contact 249 is opened, as shown in Fig. 2 R1 applied, the resistance of the buzzer Su being such that the relay R1 does not respond when the loop is established. The caller then receives the busy signal via the buzzer itself. It goes without saying that the buzzer Sit can be used in a multiple circuit for several or all of the R relays.

The following is a description of the individual switching processes. when establishing a house connection; an exchange connection or an inquiry connection; be made.

House Traffic Accepted; the subscriber at the subscriber station Tni wishes to establish a connection with the subscriber at the subscriber station Tn2. When the receiver is lifted at the subscriber station Tni, the following circuit is established: earth, contact 24g, relay R1, contacts 72 x1, $ o ui ', winding II of the differential relay X1, loop at the subscriber station, winding I of the differential relay X1, contacts 79 u1 ', 16 t1, relay AnPw, battery, earth. In this circuit, the relays R, and AnFw are energized. The relay AhtPw activates its contact and causes the signal machine SIV to be started, in which the signals required to operate the system are generated. The relay .T is excited via its winding II with the relay type together in the following circuit: earth, winding II of relay T, contacts i r1, 49 zti, winding I of relay old, battery, earth. The relays I and An operate their contacts. The official sign AZ is applied to the wire HLca via the capacitor Ko i via the contacts io an and 45 n. Via contact ii an earth is applied to contact i 12 d to the starting line Anl of the relay selector RW. The contact 9 on is transferred. The relay J has closed the contact 5 i, whereby earth is applied via contacts 57p and 2 r1 to the winding I of the relay T1, whereupon this via contacts 14 t1, 67 t2; 46 111, battery,. Appeals to earth. By closing contact 13 t1, relay Ti produces a holding circuit for its winding II, which runs to earth at contact 5 i. The contacts i5 t1 and 16t1 have been moved, whereby the calling subscriber is connected to the house line HL . The relay I is now kept energized via the subscriber loop. The calling subscriber now receives «the trunk signal switched on via v Kontakt io to . Relay V3 was energized by relocating contact 7 i. The relay Vs has activated its contacts. The relay G was switched on by contact 2o v3, which opens the contacts 25g and 24g. As a result, the relays R1 and R2 were switched off from earth, so that another calling subscriber can no longer energize his line relay R. The relay R1 of the calling subscriber was de-energized when contact 249 was opened. The relay on stops on contact 9 and earth on contact 5 i is energized. The relay AnPw has dropped out when the contact 16t1 is changed over, but the signaling device SM is kept in operation by the earth connected to the line Anl via contact ii.

If the subscriber at the subscriber station Tu operates his dial to call the subscriber Tn-2, the relay T is brought to fall when the loop is opened for the first time. As a result, when the contact 7i is flipped over, the relay h4 is excited via earth, contact 2i vs, relay T14, contact 7i , battery, earth. The relay V4 remains activated during the current impulse. The winding II of relay B is switched on by contact 27v4; which appeals. The contact 59 b is switched over, but this has no effect on the line CL, since the contact 26v4 has been opened. Furthermore, the contacts 29 v4 and 28 v4 were opened, but this means that switching operations are not carried out. If the contact 6i returns to its rest position, the following circuit is established for the relay K of the relay selector RW: earth, contacts 112d, ii an, 61, 118 f, 56p, 38w, relay K, battery, earth. The relay K is energized and operates its contacts. If the relay J picks up again after the first current surge, the relay W is excited via its winding II, namely via earth on the line Anl, contact 32k, winding II of the relay W, contacts 56 p, 118 f, 6 i, Relay K, battery, earth. The contact 38w is turned over and the winding of the relay W is switched on. When the contact 31 k is moved, the selection relay i has been energized via earth on the line Anl, contacts 31 k, 43n, selection relay i, battery, earth. The relay i has closed the contacts 34.1 and 35.1. The relay N is excited via its winding I, namely via earth on the line Anl, contacts 31 k, 43 n, 41 w, winding I of the relay N, battery, earth. The selection relay i is kept energized via contacts 4o w and 34.1. The relay N actuates its contacts and energizes the relay Ni via its winding II via contact 44 n. The contact 45n is switched over and switches off the official signal. Contact 46n1 prepares a circuit for winding I of relay N1. Contact 43 n opens the excitation circuit of winding I of relay N. Contact 47n1 is opened. The contact 48n1 is closed and thus prepares a circuit for the relay P.

If the impulse relay J is de-energized with the second impulse, the contact 6 i returns to its rest position. This de-energizes the relay K. The selector relay 2 is switched on by contact 31 k via contact 35.1. The selector relay: 2 responds and operates its contacts. If the relay J responds again after the second current surge, the relay W, which was held via its winding I, is also de-excited. The relay W changes its contacts and interrupts the holding circuit for the selector relay i at contact 40w. The selection relay i drops out. At contact 39w, relay W closes a holding circuit for selector relay 2 via contact 51.2. If there are no further loop interruptions, relay J remains energized for a longer period of time. This short-circuits the relay V4 via contact 7i and causes it to drop out. The x contact 27v4 is opened and the relay B, which was excited via winding II, begins to drop out. The relay P is energized via contact 29 v4, as a result of which a short circuit in the winding II of the relay An is canceled by contact 57p.

If the desired participant is free, the relay B, which was connected with its winding I to the wire CL , drops out, since a holding circuit has not been established via the winding I. Ringing current is transmitted by ringing current device T14 '. This ringing current runs from earth via the secondary winding of the transformer in the ringing current device T14 ', contacts 59 b, 26v4, 53.2-, 69 t2, 141 u2, relay R2, contacts 142x2, 125u2, winding II of relay X2, ringing device in the Subscriber station Tn., Winding I of relay X2, contacts 126u2 ', 68 t2, relay AnPn, battery, earth.

If the subscriber Tn2 lifts his receiver, the relay R2 responds in the following circuits: earth, battery, relay AnPw, contacts 68 t2, 12611, ', winding I of relay X2, subscriber loop, winding II of relay X2, contacts 125 and the like , ', 142 x2, relay R2, contacts 141 u2, 69 t2, 53,2, 26v4, 59b, earth in the ringing current transmission device T14'. The relay R2 actuates its contacts and energizes the relay T2 and the counter winding II of the relay An via contact 64r2. This circuit runs from earth via contact 5 i, winding II of relay An, contact 64 r2, winding I of relay T2, contact 46n1, winding I of relay Ni, battery, earth. The relay T2 responds and switches itself into a holding circuit via contact 66t2. The relay An is de-energized by energizing the counter-winding II and activates its contacts. By opening the contact ii via earth is switched off by .der Anl Anl of the relay selector RW, whereupon all relays of the relay selector up to. on relay N, are triggered. When the contacts 704 and 68t2 are switched through, the desired subscriber is connected to the house line HL . Relay R2 drops out, which also opens the current circuit via winding II of relay An and windings I of relays T82 and Ni.

Relays T1, T2, J, Tos and G are energized during the call.

If the connection is to be released, both participants must have their own Hang up the receiver so that relay J goes to waste. If this is the case, so relay V3 is short-circuited via contact 7i. The relay Tos drops out and causes relay G to drop out by switching contact 2o v3. The relays T1 and T2 are de-excited when contacts 5i and 22 v3 open.

If the desired subscriber is busy when establishing a house connection, relay B is kept energized via its winding I via wire CL, namely in the following circuits: earth, winding I of relay B, contacts 59 b, 26v4, 53.2 , 69 t2, relay AnPw, battery, earth. The relay B then puts its contacts over and switches the busy signal bes raised over contacts; 45n, io on, capacitor Kol on line HLa on, so that the calling subscriber is informed that the desired line is busy. If the subscriber then hangs up his receiver, relay J is de-energized and the triggering processes are carried out in the manner already described. Outgoing exchange service Assuming that the subscriber of the subscriber station Tn wishes to establish an exchange connection, if the house unit is free, the same circuits are set up as when a house connection is established. Relay R first responds again, then relays An and J respond, and then relay T1 of the calling subscriber. Furthermore, the relay V3 and the relay G are energized. If the subscriber now presses the Tal button on his microphone unit, relay X1 picks up via the following circuit: earth, battery, winding L of relay J, contacts 16 t1, 79 ui, winding I of relay X1, button Tal, earth. The relay X1 operates its contacts and causes. the relay. Ui via earth, contacts 86g1, 73 x1, winding I of the relay Ui, battery, earth responds. The relay Ui causes the relay U, 'to be energized by closing the contact 76u1. The relays C and G1 also respond. The relay G1 turns over the contacts 86 g1 and 87 g1 and thereby has the effect that the Amtsverbindunzsleitüng is blocked, since other relays U can no longer respond. The relay Ui is held via contacts 75 ui when the contact: 86gi has been opened. If the contacts 79u1 and 8o u, 'have been switched over; the subscriber is connected to the exchange line. The relay S is activated via the subscriber loop. Contact 89s closes and creates a circuit for calling the office. The contact go s prepares a response circuit for the relay V1. If the subscriber at the subscriber station now releases the Tal key, relay X1 drops out, whereupon relay C also drops out. Contact 84c is closed and energizes relay Tal. The relays Ui and Ui are kept energized via their windings II via contacts 78 ui , 82 cl, 99 v1, earth. The relay V2 is short-circuited via the contacts ioovi and iö i v1: The contacts 15o v1 and 15 r v1 switch on the outgoing wires of the exchange line. When relay Ui 'responds, relay J, which was addressed when a call was initiated, is de-energized, and this causes all relays that are energized to drop out as a function of this energized relay: If the subscriber starts dialing numbers, relay S is pulsed actuated, the relay h2 being energized at the first drop of the relay S by opening the normally open contact and closing the normally closed contact of the contact go s. The relay Y2 opens the contacts 105V2 and ro6v2, whereby the outgoing line leading to the exchange is disconnected from the capacitors of the speech lines. The contact 107v2 short-circuits the choke Dr, so that a perfect current impulse to the office is possible via the contact 89s. The call bridge, in which the relay: A is located, is separated by contact 104V2. If the current impulse has ended on the part of the subscriber, the contact go s is again continuously switched over, so that the relay V2 is short-circuited and drops out. The connection with the office is established. If the subscriber Tni initiates an outside call while a house call is in progress, i.e. when the house connection line HL is busy, no relays can respond when the receiver is picked up, since the relay G is energized and the connection lines are blocked by opening contacts 24g and 25g has made. If the participant then presses his key Tal, the relay X1 is excited via earth, key Tal, winding I of relay X1, contacts 79 ui, 16 t1, winding of the relay: AnPw, battery, earth. Contact 73 x1 is closed and relays U, and C are energized. The contact 76u1 causes the excitation of the relay Ui, whereupon the contacts 79 u1 'and 8o u1 are switched so that the calling party is connected to the trunk line AL . The other switching operations that are required when establishing the exchange connection are the same as previously described.

If the external line is busy when the Tal key is pressed, the calling subscriber receives the busy signal via contact 72 2L1.

In Fig. 2 an arrangement is now shown in which the connection lines when the house lines HL is busy not by switching off the ground potential at the contacts 2q.9 and 25g, as shown in Fig. I, but in the case of Opening the contact 249 a buzzer Su is switched in series with the relay R .. This buzzer is switched on via its own contact su, so that when the receiver is picked up at the subscriber station, the relay R1 does not respond, but the buzzer is activated . If the subscriber hears the character generated by this summmer, he knows that the house connection line is busy. He can initiate an exchange connection despite the fact that the house connection is busy, because when his key Tal is pressed, the differential relay X1 is operated in series with the relay AnPw, in the way that has already been described above. Inquiry connections If the subscriber at the subscriber station Tnl wishes to establish an inquiry connection while an external call is in progress, he presses his Tal key. This energizes relay X1 via earth on key Tal, winding I of relay X1, contact 79 ui, winding II of relay S, battery, earth. Relay X1 responds and causes relay C to be excited via earth via contact 73 x1, - contacts 75u1, 73 x1, relay C, battery, earth. In the case of an exchange connection, the relays U1 and Ui are energized, as already described, in the following circuit: earth, battery, windings of the relay Ui and U1, contacts 78 ui , 82c, possibly. Since the relay hl is also energized during an external call via contact 9o s, when relay C responds, relay Y is activated via contact 83c in the following circuit: Earth, Kontakteggvl, 83c, 119z, relay Y, battery , Earth. A loop is established via contact iiiy, which maintains the current connection to the office. The winding II of the relay D is switched on via the contact iogy, namely via earth, battery, winding II of the relay D, contacts iog y, 82c, 99 v1, earth. Contact 113 d operates relay E via earth, contacts 47 ni, i 13 d, relay E, battery, earth. The relay E operates its contacts and caused by closure of the contact 116 e energization of the relay G and F. The relay F to close the contact 117f is applied thereby to the earth for the purpose of connection of the selector LeitungAnl RW. The relay G has been energized and blocks the control center against house occupancy. The signal machine SM is also started by applying the earth to the contact 117f on the line Aal. If the subscriber Tnl releases his key Tal , the relay X1 drops out. This also causes the relay C to drop out, since the contact 73 xi is opened. The relay D is kept energized via the contacts iogy and ii2d regardless of the closure of the contact 82c. The relay Z responds via its winding I, namely via earth, battery, relay Y, contact 83 c, winding I of relay Z, contacts iioy, ggvi, earth. The relays Y and Z are held via the winding I of the relay Z, via contacts i ioy, 99v1, earth. The relay Z prepares the connection of the wire L fb by moving the contact 12o z , the purpose of which will be explained later. When relay E responded, contact 140 e was also switched over so that the subscriber making the request receives the official signal. The participant is now able to vote.

During the selection, the relay S is actuated in bursts. When relay S drops for the first time, relay S is also de-excited by opening contact 88s. Relay S1 changes its contacts and, through contact i22 s1, excites relay K of the relay selector via the following circuit: earth, contacts 117f, 122s1, ii 8 f, 56p, 38 w, relay X, battery, earth. The relay K is energized. If the relay S is energized again after the first current surge, the relay S1 also responds again, whereupon the relay W of the relay selector RW is energized via the winding II. The relay selector RW is now set in the same way as described for a house connection, but not through the impulse contact 6 i, but through the contact 122s1. When a current surge is emitted, the relays K, N, NI, W and the selector relay i respond. With the second current impulse, the selection relay 2 is switched on with de-excitation of the relays K and W. Assuming that the participant has sent two current impulses, the participant Tn is stimulated. The relay V2 is excited during the current impulse and, since the relay Z has responded, so is the relay V4, since it was switched on via its winding II.

If the current impulse is terminated, the relays h2 and V4 drop out, since the normally open contact of the changeover contact go s remains closed for a longer period of time. When relay V4 responds, relay B has been energized via contact 27v4, so that winding I is connected to line CL via contact 59b when relay V4 drops out. If the called subscriber is free, ringing current is transmitted after relay B has dropped to ground, ringing current device Tr4 ', contacts 59 b, 26v4 53,2, 69t2, 141u2, relay R2, contacts 142 x2, 125 U.', winding II the relay X2, call device of the subscriber station T%, winding I of the relay X2, contacts i 26, u2; 68t2, relay AnPw, battery, earth. If the desired subscriber answers, relay R2 responds. The relay R = activates its contacts and energizes the relay U2 of the desired participant in the following circuit: earth, contact 116e, winding 1 of relay D, contact 72 r2, winding II of relay U2; Battery, earth. The relay U2 activates its contacts and switches on the desired subscriber through the contacts r25u2 'and 126u2. the trunk line AL.

In the same circuit in which relay U2 was energized, there will also be the winding I of the relay D is energized. The winding I is opposite to the winding II wound so that the relay D is thrown off. The relay F_ is brought to drop and also the relay F. The relays U2 and U2, however, hold each other via contacts 124u2, 82c, 99v "earth energized. The relay G also drops out. By dropping the Relay F is disconnected from line Anl when contact 117f earth opens; so that all relays energized in the voter are de-energized. The subscriber's relay R2 Tn, drops when contact 141ü2 is transferred. The participants are now in parallel connected to the trunk, and in completely equal and equal rights Way.

The one of the two subscribers who now presses his earthing button disconnects the other subscriber from the outside line and can continue the outside call alone. Assuming that the subscriber Tnl wants to continue the external call after the consultation call, he presses the Tal button. This applies earth to winding I of relay X1 so that it responds in the following circuit: earth, button Tai, winding I of relay X1, contact 79 ui ', winding II of relay S, battery, earth. The relay Ui of the subscriber who wants to take over the call is kept energized by contact 73 x1 in the following circuit: earth, battery, winding I of relay U1, contacts 73 x1, 75 ui, earth. Relay C responds in parallel to relay U1. The relay C now opens the holding circuit for the relays U2 and U2 of the subscriber Tn through contact 82c. The relays U2 and U2 drop, whereby the subscriber reached in the inquiry is disconnected from the exchange line. By responding to contact 83 c, the hold circuit or relay Y is interrupted. The relay Y drops out and by opening the contact i io y brings the relay Z to drop out. This reconnects the exchange line via contacts 1 i 1 y and 12o z, so that the subscriber Tnl can continue the exchange call. If a subscriber to be called in inquiry is busy, relay B is kept energized via winding I after setting the relay selector RW, namely in the following circuit: Earth; Winding I of the relay B, contacts 59b, 26v4, 53,2, 69 4, relay AnPw, battery, earth. The relay B now causes the relay open , which is designed as a delayed responding relay, to respond, via earth, contacts i 15 e, 113 d, 28 v4, 61 b, relay open , battery, earth. This actuates the contacts i28auf, i2gauf and 13oauf, so that the exchange line AL 'is connected to the house line HL via the contacts i28aüf and 12gaUf. The busy signal switched on via contacts 6o b, 4514 140e is attenuated by opening the i3oatuf contact. If they then hang up their receiver, after the relay I has dropped out, which in turn causes the relay T2 of the desired subscriber to drop; whose relay R2 is energized, whereupon the desired subscriber is coupled to the exchange line by addressing the relays U2 and U2.

Should the relay selector RW be in use at a point in time at which another subscriber would like to initiate an inquiry connection, then switching means are influenced which make the relay selector RW immediately available to the inquiring user. If the relay C is energized when the inquiry is initiated, then, as already described; the relay Y is energized via the contacts gg v1, 83c and i ig z. Furthermore, the winding II of the relay D is pulled through contacts y, 82 c, 99 v1 excited. The relay D now switches off at contact iia d earth from contact ii, so that all relays energized in the relay selector are de-energized. Relay N, is also located among these. If the relay Ni drops out, it is above earth; Contacts 47 n1, 11,3d energize relay E. The relay E switches the contact i 16 e and causes the excitation of the relay F. The relay F applies earth to the line Ail at contact 117 f , so that the relay selector RW is available for the subscriber making an inquiry. If the relay C is de-energized after releasing the key Tal, the relay Z also responds, namely via earth, battery, relay Y, contact 83 e, winding I of relay Z, Kontal <.te i io y ,. g9 v1, earth. The relay Z switches the contact i ig z and switches the winding II of the relay Z on. The subscriber who is switched off by the voter in the house call receives the official signal, which is transmitted to the subscriber when relay N drops via contacts 45n, 1 o to capacitor Kol, so that he learns of the switch-off. The subscriber dropped by the voter can now hang up his receiver and try again to initiate a call at a later time. However, if he does not hang up his receiver, this does not affect the consultation call, since the contact 6 i, via which the subscriber could influence the relay selector, is rendered ineffective for the relay selector by moving the contact 118 f.

Incoming exchange traffic Relay A is switched on and actuated by the incoming ringing current. Contact 130a energizes relay H. A holding circuit for relay H is established through contact 132, h. The contact 135h starts the signal machine SM. The contact 133h applies ringing current to the line ALa, the contact 134h short-circuits the winding I of the relay S so that it is not influenced by the ringing current. Contact 13.ih applies earth via transformer Tr via contact 17 t1 to winding I of relay U1. The relay U1 is energized and causes the relay U1 'to be energized via the contact 76 u1. The relay G1 is energized and blocks the trunk line against outgoing traffic. The subscriber Tnl, who is switched as the main unit, is connected to the exchange line via the contacts 8o ui and 79 ui and called via ringing current source 2 ". If the subscriber picks up his receiver, the relay S responds. The relay S causes the excitation of the relay V1 by moving the contact 9o s. The relay hl opens the contact i o2 vl, whereby the relay H goes to waste. The contacts 1 50 v1 and 151 v1 switch the exchange line through.

The transfer of incoming trunk calls to another subscriber takes place, as described above, via inquiry.

Should the subscriber Tnl be busy when an external call arrives he receives a sign via the transformer Tr and the capacitor Kos, which informs him of the incoming call.

Claims (7)

PATENT CLAIMS: 1. Circuit arrangement for telephone systems with relay selectors, in which the subscriber connection lines are connected by coupling relays to connecting lines of different traffic directions and in which the excitation of the coupling relays when the subscriber line is connected to a connection line of a certain traffic direction; that when busy, all connecting lines over a certain traffic direction (HL) switch means (G) are effective, which switch off the call potential for this traffic direction, which is on each wire of the subscriber lines (2q.9, 259) and thus addressing others prevent the connection lines of the specific traffic direction (HL) occupying coupling relays (R, T), without, however, the connection of connection lines of other traffic directions (AL), which in a known manner by grounding a wire the subscriber lines in the subscriber station is prevented. 2. Circuit arrangement according to Claim 1, characterized in that when all connecting lines are blocked one traffic direction, the earth potential is switched off from all connecting lines will. 3. Circuit arrangement according to claim 1, characterized in that when it is busy of all connection lines of a traffic direction the call circuit of a connection line for a connection in this traffic direction via a self-breaking contact a blocking relay (Su) runs. 4. Circuit arrangement according to claim 3, characterized marked that this self-interruption of the call flow as a busy signal to serve. 5. Circuit arrangement according to claim 1, characterized in that the Battery voltage required to operate the differential relay of a connection line if a connection line is not switched on via all subscriber lines Crossing auxiliary cores, if a connection line is switched on for each traffic direction however, this is switched on via a wire. 6. Circuit arrangement according to claim 1, characterized in that the line relay of a called connecting line when making the loop at the desired connection point via an over the Incentive path lying ground potential is made to respond via the loop. 7. Circuit arrangement according to claim 1, characterized in that the' Difference relay when busy - one traffic direction when initiating a call to the other direction of traffic even if all connecting lines are busy is brought into effect and the busy signal is transmitted to the calling station. B. Circuit arrangement according to claim z for systems with house and office connection lines; in which consultation connections are established via the trunk lines: thereby marked; that during the production of an inquiry the blocking of all connection lines for house traffic.