DE891701C - Circuit arrangement for telephone systems with dialer operation - Google Patents

Description

Circuit arrangement for telephone systems with additional dialer operation on patent 857 075 Patent 857 o75 relates to telephone systems with dialer operation, in which there are several via dialer of a connection path in an exchange different line groups of the same traffic direction can be reached. the Leadership groups can do this according to any point of view that is not of interest here be educated. So z. B. the one line group from only for local connections suitable (low-order) lines and the other group also for further connections suitable (high-quality) cables exist. In order to always to provide the appropriate management group for this structure are available for selection switching devices serving among these groups of conductors by the various Allocation of the voter-dependent switching means and under the influence of the traffic direction marking standing switching means each in one of the line groups to be provided corresponding Way influenced.

The object of the present invention is an expedient design this arrangement to the selection of the line group with as little as possible Make effort on switching devices.

This is achieved in that to determine which one is to be used Line group serving the same direction of traffic to different identification cores Contact arms accessible E of according to the traffic direction marking adjustable selection devices are connected and the switching devices according to their influence by switching means dependent on the various occupancy of the voters and by switching means under the influence of the traffic direction marking provide one of these switching arms for the determination of the corresponding line group.

To explain the invention, an excerpt from an exchange labeled B from a number of several in-line exchanges is selected, which comprises an incoming transmitter Ue i with an outgoing transmitter Ueg accessible via an adjustable selector path GW with the help of evaluation devices. The two transmitters with the selector path in between are shown in the upper part of FIG. I, while an evaluation device is shown in the lower part of FIG. I and in FIG. Only a single group selector GW of the selector path that can be set by the evaluation device is shown. But this path can also be several, z. B. two or three, electoral stages. From each of these electoral stages, the outgoing transmitter shown Ue 2 corresponding outgoing transmitter and from the latter connection lines corresponding to the connection line YL 'shown to another exchange can be reached. As already mentioned, the selection levels are set with the aid of evaluation devices, of which a free evaluation device is connected to the assigned transmitter via a switch-on selector AS when an incoming transmitter Ue i is occupied. The activated evaluation device is influenced by a three-digit destination identifier assigned to the desired exchange, which, because of the large number of exchanges in series, the number of destination identifiers is greater than the number of connection paths (line groups) going out from exchange B, in a memory device in a line group identifier is implemented after a free storage device SPE has been reached via a converter group selector UGW which is set according to a part of the target identifier and the meaning of which will be explained later. The line group identifier controls the selection levels of the connection path to the line groups that are suitable for setting up the desired connection and via which the connection path to the desired exchange can be established via further exchanges, if necessary. Under certain circumstances, several line groups are available for establishing the connection, one of which is initially made available as the main route and only when it is busy can other line groups be reached as first, second and third detours by sending another line group identifier via the dialer route.

For the exchange B shown in the section, the following are in this case Transport options are not given to exchange B by one here shown, appropriately equipped upstream exchange A from occupied, then a correspondingly equipped subsequent, not shown here Exchange C as a terminal or transit exchange or one of the local exchanges the switching center B shown or an auxiliary station can be reached. Will the Switching center B shown occupied by one of its local exchanges, so a correspondingly equipped subsequent, not shown here Switching center C - can be reached as a terminal or transit switching center.

If the exchange B shown in the detail is occupied by an appropriately equipped upstream exchange A, not shown here, after reaching the incoming transformer Ue i shown in the upper part of FIG the relay Vo on, so that the relay Co in the same circuit is excited by opening the contact 5 vo. After the contact 8 vo is closed, the contact 54an is closed via the contact 7 c io with the intermediary of provision devices An not shown here, so that the relay Ma responds via: -, Wi 6, 55c, sw ii in o, cw i in o, zw i in o, Aw i in o, Ma, 5q.ara, +. By closing the contact 163nza the drive Mas is switched on, @ so that the Schaltarmeasi to as6 of the switch-on selector AS (hundred-part motor selector) are moved to look for the occupied transformer Ue i. As soon as the transformer Ue i is reached, the relay Pa speaks to: -, C io I, g vo, ii co, 12do, asi, 6o s2, Pa 1-1I, 62ma, - @ -. The drive Mas is stopped by closing the contact 164 Pa. By closing the contact 61 pa, the relay C in series with the winding I of the relay Pa is excited. The relay C i responds via the contact 5g e. The relay C 1o has also come to excitement in the mentioned circuit running over the switching arm as i. By closing the iocio contact, this circuit is maintained regardless of the g vo contact. Now that the contacts q. c0 and 2 c io are closed, the relay Vo is delayed caused by a short circuit to drop. Until de-excitation, a temporary stimulus to the upstream exchange A, not shown here, is initiated via the contacts 8vo and 6cio and the wire 3, from which the incoming transmitter Uei has been assigned to the connecting line VZ. This causes the destination identifier assigned to the desired exchange to be sent from there. This consists of three series of numbered current impulses, which are picked up by the relay Ao via wire 2. As a result of the corresponding actuation of the contact 14a0, the relay Js is actuated in accordance with the individual series of current impulses.

If, for example, a connection path to one should only be made after going through numerous in series. horizontal exchanges reachable exchange are established, so z. B. brought the destination identifier 123 from the upstream exchange for transmission. The relay js, through the intermediary of the relay. The winding I of the relay Pw is influenced via the contact 146is. The relay Pze, responds and holds on: -, Wi8, 7oPw, 69k, 7 = c, 72s2, Pw II, -f-. In addition, when the contact 17q.is closes once, the switching magnet Dhw receives a current surge, so that the switching arms hw i to hw 6 are advanced by one step to contact i. In the circuit of the switching magnet Dhw, which runs via -, Dhw, sw 13 in o, 174is, Vs I-II, +, the relay Vs is also energized during the first series of impulses, so that when the contact 56vs closes the relay F it is excited via: -, Wi 6, 56 vs, 58 dsw i, F, +. By closing the contact 57 f, the relay F remains independent of the contact 56vs. If the relay Vs is de-energized again after the first series of current impulses has elapsed, the switching magnet Dsw i of the control switch is energized via the contacts 165 vs and 166f; he switches the switch arms sw ii to sw 14 by one step into position i. By opening the contact 58 dsw i when the switching magnet Dsw i is energized, the relay F is de-energized, so that the switching magnet Dswi is switched off again by opening the contact 166 f. Since the switching magnet Dzw is switched on via the switching arm sw 13, which is now in position i, instead of the switching magnet Dliw, the second series of current impulses causes the switching magnet Dzw to be excited twice via the correspondingly actuated contact 17q is. The switching arms between i to zwq. are therefore brought to contact 2 for setting by two switching steps. The relay Vs is also influenced during the second series of current impulses, so that the relay F is again energized via the contact 56 vs in order to maintain itself independently of the mentioned contact via the contact 57 f . After the end of the second series of impulses, the relay Vs is deenergized by keeping the contact 174 is open, so that after the contact 165 vs is closed, the switching magnet Dsw i again receives a current impulse to bring the switching arms sw ii to sw 14 into position 2 . The relay F is de-energized by opening the contact 58 dsw i. Since the switching arm sw 13 is now switched on via the switching arm sw 13, the third series of current impulses consisting of three current impulses influences the switching magnet Dew by actuating the contact 174 is three times, so that the switching arms ew i to ewq. get to contact 3. Since the relay Vs is influenced again during the series of current impulses, the relay F is again energized after the contact 56 vs is closed. The relay F is held via the contact 57 f when the relay Vs is de-energized after the third series of impulses. Accordingly, the switching magnet Dsw i is excited for the third time in order to bring the switching arms swii to sw 14 into position 3. By opening the contact 58 dsw i, the relay F is de-energized. When the relay Vs is excited for the first time, i.e. with the first impulse of the first series of impulses, the Cugw relay is excited via: -, Wi 14, 155 vs, Cugw I, +. By closing the contact 156cugw, a circuit is created via: -, Mugw, I58 dugw, I56 cugw, Cugw II, +. In this circuit, the Mugw relay responds while the Cugw relay is held. By closing the contact 161 misgw, the drive Ugw is switched on, so that the switching arms ugw i to ugw io of the converter group selector UGW (hundred-part motor selector) are moved. The contact field is divided into ten groups of ten, for example, of which only three groups with a considerably smaller number of contacts are shown here. In the contact bank reachable from the switch arm ugw 9 , the first contacts of each group (I i, II i, III i) are wired together, while the contacts of the same group are connected to one another in the contact field of the switch arm ugw io. Since, as already said, the switching arm hw6 is on contact i, after reaching contact i of group I through the switching arm ugw 9, the following circuit is established for the relay Pugw: -, Wi i5, 16o cugw, ugw 9 on I i , PugwI, 1I, 152mugw, ugwio on I, hw6 on 1, 83Pw, -f-. By closing the contact 162pugw, the drive Ugw is stopped. After closing the contact i53 pugw, the relay Dugw comes to excitation parallel to winding II of the relay Pugw. By opening contact i58 dugw, relay Mugw is switched off and winding II of relay Cugw is de-energized. The relay Cugw is only de-energized if its winding I is not held via the contact ab i, which is closed when all storage devices of this group of hundreds are occupied. If there is still a free memory device available in the memory group accessible via the first group of hundreds of the converter group selector UGW, i.e. the contact from i is open so that the relay Cugw cannot hold itself through its winding I, the relay Mugw comes after the relay Pugw and Dugw have become de-energized by opening the contact 16ocugw, again for excitation via: -, Mugw, i58 dugw, I57cugw, 159wugw (shaft contact of the UGW), By closing the contact 16irnugw, the drive Ugw is switched on again, so that the switching arms ugw i until ugw io can be further advanced until a free memory device is found in group I by the switching arm ugwg. Is z. If, for example, the storage device SPE shown in Fig. 2 is such, the following circuit is established on contact 2: -, Wi 25 (Fig. 2), sw22 in o, 2iiwuw, 2iowvw, 2o9wew, 2o8c2, C - II, a3 , ugwg on 2 (Fig. I), Pugw I, II, i52mugw, ugwio on I, hw6 on i, 83Pw, -E-. By closing the contact 162pugw, the drive Ugw is stopped. After the contact 153Pugw is closed, the relay Dugw is energized parallel to winding II of the relay Pugw. The Mugw relay is switched off by opening contact 158 dugw. By closing the contacts 147 dugw to i5o dugw, the connection to the selected memory device takes place. The memory devices, of which the memory device SPE is shown in FIG. 2, are divided into groups of hundreds, of which the respective group in question, as has just been explained for the memory device SPE, is indicated by the first digit of the target identifier with the aid of the converter group Voter UGW is selected, who then searches for a free memory device in the selected group. This storage device then sets the target identifier either immediately after it has been switched on, if the line group identifier used to set the dialer to the next exchange can already be determined from the hundreds digit of the destination identifier, or after the tens digit has been recorded with the beginning of the recording of the units digit, if by the tens digit the line group identifier required for setting the dialer to the next exchange must be determined, or only after the three digits of the destination identifier have been included in the required line group identifier. Corresponding to the allocation of the memory devices to the different hundreds groups of the target identifiers , only that hundreds line leads from the hundreds lines Hl i to Hl io, which can be reached via the switching arm ugw 6 and which originate from the corresponding contacts of the individual groups, to the occupied memory device, which of the recorded hundreds digit is equivalent to. In the present example, only the hundreds line Hl = to in Fig. 2 SPE memory device shown would be performed, if this storage device only target plate with the hundreds digit i would implement in line group code. This is not the case here, however, since the storage device SPE would then not be used to a sufficient extent. If, for example, each memory device in its group of hundreds, depending on the two other digits (tens and ones) of the various destination codes, can convert these destination codes into hundreds of line group codes, in the connection case in which the hundreds figure is already used to determine the direction of the desired exchange, that is is sufficient for conversion into a line group identifier, if there is a main route and three detours, conversion into only four line group identifiers may be necessary, while another ninety-six line group identifiers are not available for this group of hundreds. In such a case, for better utilization of the storage devices, the arrangement is made such that the storage devices serve one or more further groups of hundreds until their capacity is exhausted. In such a case, the corresponding hundreds lines are then wired to the memory devices serving several groups of hundreds. This will be discussed again later. First, for the present connection case, the hundreds line hl i is connected to the memory device SPE shown in FIG. 2.

In the circuit running over wire a 3, relay C2 has now been energized in addition to relays Pugw and Dugw. After closing the contact 26z o 2, the relay V responds; it holds over: -, VII, sw 23 in o, 2: 29v, 2402, 2I5 dsw 2, F i I, In this circuit the relay F i also responds. Relay S5 is energized via Kontal #: t 255c 2. Since the switch arm hwq. reached contact i is connected to positive potential, which is the case if the hundred digit is already sufficient to form the line group identifier, after the contact 15odugw is closed, the relay Hy (Fig. 2) is energized via: -, MYI, sw21 in o, a2 , ugw 8 to 2, i5o dugw, 139h, hw q. on i, +. The relay My places itself with its winding III in a holding circuit. By closing the contact 232my, the relay R responds, while the drive Myw is switched on immediately via the contact 302my, so that the switching arms yw i to 7w zo of the selector RW (hundred-part motor selector) may already be activated after the hundred-digit number of the target number has been recorded before the recording the tens and units digits are moved. The switching arms ywi to yw io are moved forward until one of the switching arms yw i to yw 3 finds a contact marked according to the recorded target identifier, ie until the contact is reached to which a negative potential is applied via the hundreds line hl i. This occurs as soon as the switching arm rw i finds the contact i to which the hundreds line hl i is connected via the wire UK ioi. Of the contacts that are coated by the switching arm yw i, the first is wired to the UKioi wire and the hundredth to the UK ioo wire. Intermediate contacts may be connected to corresponding wires. These UK cores are wired according to the individual target identifiers with the relevant contacts, which can be reached indirectly via the switching arms uw3 to uwio or directly via the hundreds of lines hl g to hl i, in a specific manner that is decisive for the implementation in line group identifiers. If the potential is connected to one of these contacts via this type of wiring, relay 01 will respond in addition to relay Py. The rw2 switching arm brushes contacts, the first of which is wired to the UK2oz / UK4o = wires and the hundredth to the UK2oo / UK4oo wires. Intermediate contacts may be wired with appropriate wires. If the potential is connected to one of these contacts in accordance with the target identification recording, relays 01 and 02 are activated when using the UK 2oi or UK 2oo wire and only relay 0 2 when using the UKq.oi or UK4oo wire. The switching arm yw 3 brushes contacts, the first of which is wired to wires UK301 / UK5oi and the hundredth to wires UII # 3oo / UK5oo. Intermediate contacts may be connected to corresponding wires. If the potential is connected to one of these contacts in accordance with the target label recording, relays 01 and 03 are activated when using wire UK3oi or UK3oo and only relay 03 when using wire UK5oi or UK5oo. By energizing the relays 01 to 03, individually or in various combinations, as will be explained later, via the switching arms ew 6o to ew go, which are set according to the setting of the selector RW, one of sixteen options is set in each case the number and order of the available detours. In the present connection case, the hundreds line HI i is connected to the contact i which can be reached by the switching arm yw i via the wire UK ioi. Accordingly, the selector RW is advanced until the switching arm yw i reaches this contact. During this progression, the switching magnet Dsw 2 has been excited by closing the contact 299f i, so that the switching arms sw 2i to sw 26 have moved into position i. Since contact 2i7my is closed as a result of the excitation of relay My, the relay deenergized after opening contact 215 dsw 2 is deenergized. F i in position i is again excited by: -, V II, 2i7 my, sw 23 in i, 229v, 214c2, 2Z5 dsw 2, F 1 I, -E-. The switching magnet Dsw 2 is influenced for the second time via the contact 299 f i, so that the switching arms sw 2i to sw 26 move into position 2. The relay F i is de-energized by opening the contact 215 dsw2. In position 2, relay Fi is again excited via contact 217my, so that switching arms sw 21 to sw 26 are switched to position 2. In this position the relay F i, which has meanwhile been switched off again, is brought to excitation again via the contact Zig oa and the winding 1I of the relay My, so that the switching arms sw21 to sw26 move into position 4. In position 4, the relay F i, which has meanwhile been deenergized, is re-energized via winding II of relay Me, this relay also responding and, after contact 315nae has been closed, its winding III is in a holding circuit. The switching magnet Dsw ?, is influenced for the fifth time, so that the switching arms sw 21 to sw 26 move into position 5. Here, the open contact igg me initially prevents the relay F i from being influenced again and thus prevents further switching of the switching arms sw 2i to sw 26. Since, as mentioned above, the switching arm yw i has reached the marked contact i, the following circuit is created: -, KI, 81 e, 8o e, 82 ie, 148 dugw, ugw 6 to 2, hl i, UK ioi, rw i to 1.01, py, -f-. In this circuit, the relay Py responds and stops the drive .l7yw by closing contact 303py. By closing the contact 188pr, the winding III of the relay My is short-circuited, so that the relay 117y is deenergized. comes. By closing the contact 256my, the relay Py is short-circuited, while the relays 0 i (Fig. 2) and K (Fig: i) are excited in the circuit running over the hundreds line HL i. Since, as already mentioned, the relay Me has come to excitement via the switching arm sw23 in position 4 and has placed itself in a holding circuit, the drive Mewo is switched on via the contact 304me, so that the selector EWo (100-part motor selector) to run begins. As with the voters UW and RW, only a small part of the contacts is shown by the voter EWo, so that the representation by reproducing all the contacts does not become too extensive. The selector EWo is advanced via these contacts until contact 2 is reached by the switching arm ew io. Since this contact is characterized by the switching arm yw4 on contact i, the following circuit is created: -, U5 I, 265 v, yw4 to i, ew io to 2, Pe, -f-. In this circuit, the relays Pe and U5 respond. By closing the contact 305 Pe, the drive Mewo is stopped, so that the selector EWo stops. By setting the selector EWo, the line group identifier is determined by which the group selector setting is brought about on the main route to be used first, namely the first series of impulses of this impulse transmission is caused by the position of the switching arm ew 2o, the second series of impulses by the position of the switching arm ew 30 and the third current impulse transmission is determined by the position of the switching arm ew4o. Since, in the meantime, after the excitation of the relay Pe, the winding III holding the relay Me has been short-circuited via the contact 316pe, the relay Me is de-energized, so that after the contact 32ome has been closed, since the shaft contact 317 wew is closed, the relay E 3 addressed via: -, E31, 3oge2, 307e1, Wi53, 32ome, 317ze'ew, 316pe, -f-. After closing the iggme contact, the relay Fi is excited via: -, Wi 26, 199'n'6, sw 23 to 5, 229 v, 214c 2, 215 dsw 2, F1 1, -f-. By closing the contact 299 f i, the switching magnet Dsw 2 is excited, so that the switching arms sw 2i to sw 26 move from position 5 to position 6. In this position, the relay F i, which has meanwhile been temporarily switched off at contact 215dsw2, is re-energized, so that the switching magnet Dsw 2 receives another current impulse and brings the switching arms SW 21 to SW 26 into position 7. The switch arms sw21 to SW 26 remain in this position because the contact 221f 2 is open. The contact 221f 2 has namely been opened by energizing the relay F2 after the contact 285nae has closed. The excitation circuit of relay F2 runs via: -, S41, 283s5, 284.v, 285me, 28701, 28802, 2 9 103, ew6o to 2, Wi4i, Wi42, F2, +. The relay S4 is not excited in the circuit mentioned, since the resistors Wi4i and Wi42 are in the circuit. A detour sequence i is determined by the excitation of the relay F2. The control switch has been stopped in position 7 (22i f 2) , so that via the switch arm sw25 in position 7 the line group identifier for the first detour through the switch arm rw5, after switching to position 8 the line group identifier for the second detour through the switch arm yw 6 and after switching to position 9, the line group identifier for the third detour is determined by the switching arm yw7. The fact that three detours are available is determined by the fact that the relay S 5 remains energized while neither the relay S4 nor the relay S3 respond. The relay S4 would have been excited with option 2 via the switching arm ew 6o, since then the resistor Wi 41 is not in the circuit. The relay S 3 would respond after being switched on via the contact 281s4 after closing the contact 282s5 in the case of option 3, since the resistors Wi 41 and Wi 42 are then switched off. If the relay S 4 is energized, two detours are possible, and if the relay S 3 is energized, a single detour is possible.

Since when the switching arm ywi was checked on the hundreds line hl i, the relay K (Fig. _) Was also excited, in the meantime; as the contact 140k is closed and, after the relay Fi is de-energized, the contact 207 fi is closed, the following circuit is established: -, Wi 26, igg me, Eh I, Wi 27, 2039, 2o7 f z, sw 2i to 7, a g "ugw8 on 2, 15odugw, 140k, Wii2, Ei, KIII,. In this circuit, relay E is energized, while relay K, whose windings I and II are switched off by opening contact 8o e, continues via winding III The relay Eh does not respond. After the contact 113e is closed, the relay H1 responds via: -, HI I, 114h2, 116h3, ii8h4, 120h5, 113e, Wilo, ii2ui, 88pi, iioci, -I-. In the meantime has also, after contact 296m6 has been closed by de-energizing relay Me, relay G with its winding I checked via the switching arm ew ioo standing on contact 2, whether in the one to be used as the main path, determined by the setting of the selector EWo Line group there is still a free connection line. If this is the case, then it is the contact is open depending on, so that an excitation of the relay G does not come about. The current surge transmission, which corresponds to this main path and consists of three series of current impulses, now takes place. Since, as already mentioned, relay E3 is energized, the number of current impulses in the first series of current impulses is determined via contact 9, 74e3 and the switching arm ew2o on contact 2. Since this contact is wired directly to the identification line k15 via line 5, five current impulses are emitted. These current surges affect the group selector GW shown in the upper part of FIG. This group selector has been assigned after the response of the relay K via the hundreds line hl i, in that after the contact 68 k has been closed, the relay Cgw is excited via: -, Wi3, 32kgw, (head contact of the GW), 3ocwg, Cgw 1I, 23 u0, as 5, 68 k, 71 c, 72 s 2, Pw II, +. The relay Pw is kept energized in this circuit. After the contact 35 cwg is closed, the relay A is excited via: -, A I, "64c, as3, 35cgw, 37wgw (wave contact of the GW). After the contact 97a is closed, the relay Je is excited via: -, Wi 9, 94i6, Je, 96e, g8 pi, 97a, +. By closing contact 74i6, the relay Agw is excited via: -, Agw, 28 pgw, as 6, 73a, 74i6, +. By closing contact 25 agw the relay Vgw is energized, which remains active as a delay relay during the impulse actuation of the contact 25 agw. By opening the contact 94i6, the relay Ve responds in series with the relay Je . Since the contacts 85i6, 86v6 and 89h1 are now closed, Checks the relay Pi with its windings I and II via the resistor Wi ii and the contacts just mentioned, whether there is an identification potential on the identification line kli. Since this is not the case, the relay Pi is not excited. In between short-circuited via contact 95 vi e Relay Depending on de-energization. By opening the contact 74i6, the first current impulse for the group selector GW is ended. After the contact 125i6 is closed, the relay H2 responds via: -, H2 I, Hi II, i22hi, I24ve, I25ie, 88pi or iiive, iioci, +. By closing contact 115h 2, relay H 2 with its winding I is in a hold circuit, while relay H1 is de-energized after switching off its winding I at contact 114h2 and its winding II by opening contact I24ve, since after contact 94i6 is closed the relay Ve is de-excited by a short circuit. After the contact 95 ve has opened, the relay Je responds again, whereupon the relay Ve also becomes energized again after the contact g4ie has opened. The second current impulse for setting the group selector GW is emitted via contact 74i6, while after the contacts 85i6 and 86v6 have closed, since the contact goh-- is closed, the relay Pi with its windings I and II checks the resistor Wi ii whether a negative potential is applied to the identification line kl2; since this is not the case, the relay Pi will not be energized. The relay Je , which has meanwhile been short-circuited via the contact 95 ve, is deenergized, so that the second current surge is ended by opening the contact 74i6. After the contact 125 ie closes, the relay H3 comes on. for excitation via: -, H3 I, H2 II, 126h2, 123h1, 124v6; I25ie, 88pi or iiive, iioci, -E-. By closing the contact 117h3, the relay H3 holds itself via its winding I, while the relay H2 is de-excited by switching off its winding I at contact 116h3 and its winding II at contact I24ve; the contact 124v6 is opened again after de-energization of the relay Ve by short-circuiting the contact g4ie. The relay Je is excited for the third time after contact 95v6 has opened, in order to transmit the third current impulse for the group selector GW via contact 74i6. By opening the contact 94i6 , the relay Ve responds again, so that via the contacts 85i6 and 86v6, since the contact 91h3 is already closed, the relay Pi with its windings I and II via the resistor Wi ii checks whether the identification line k13 there is a negative potential. - Since this is not the case, the relay Pi does not come to the excitation, so that via the contact 125i6 of the now re-energized relay The energization of the relay H4 via: - H4 I, H3 1I, 128 h 3, 127 h 2, 123 h i, I24ve, .125i6, 88pi or iiive, iioci, -f-. By closing the contact 119h4, the relay H4 is placed in a hold circuit, while the relay H 3 is de-energized, since the contact 118h4 and after de-energizing the relay Ve also the contact I24ve is opened. After the contact 95 ve has opened, the relay Je is energized for the fourth time, so that the fourth current impulse for the group selector GW is transmitted via the contact 74i6. By opening the contact 941e , the relay Ve responds again, so that, since the contact 924 is closed, the relay Pi with its windings I and II via the resistor I4'iii and the contacts 851e, 86v6 and 92114 checks whether on the identification line k14 has a negative potential. Since this is not the case, the relay Pi does not respond. The relays je and Ve are de-energized again one after the other, whereby after the closing of the contact i25ie in series with the winding II of the relay H4, the relay H5 is influenced to place itself in a hold circuit via its contact i2ih5, while the relay H4 after de-excitation of the relay Ve is de-energized. After the de-energizing of the relay Ve of contact 95 comes as a result of opening the relay ve ever again to energize and bring by closing the contact 741e fifth surge for setting the group selector GW for transmission. After opening the contact 941e , the relay Ire responds again, so that, since the contacts 85 ie, 86 ve and 93h5 are now closed, the relay Pi with its windings I and II via the resistor Wi ii checks whether the identification line is on k15 is a negative potential. Since this is applied via the switching arm ew2o on contact 2, the following circuit is created: -, K i I, 274c3, ew 20 to 2, 5, k15, ugw 5 to 2, I47 dugw, 78b, 93h5, 86 ve , 85 ie, Wi ii, Pi I, II, +. In this circuit, the relay Pi is excited and closes its contact 87P1, so that the relay Ni also responds. By closing the contact 99p1, the relay Pi places itself with its winding II in a hold circuit. As a result of the excitation of the relay K i, the contact 3I4 ki, since the contact 313e3 is closed, causes the relay E2 to be excited via: -, E2 I, E3 11, 313e3, 314kr, -I--. Since when the relay Pi is energized by opening the contact 88p1, the relay H5 is de-energized and the contact 93h5 is thus opened, the relay K i energized via this contact is de-energized again. By opening the contact 314 k I, the relay E 3 is switched off, while the relay E 2 continues via: -, E21, 310e2, 3076I, Wi53, 320m6, 317wew, 316p6, +. In the group selector GW, the relay Vgw has become de-energized in the meantime after the first series of impulses has been received due to prolonged de-excitation of the relay Agw; it has caused the free choice of the group voter GW in the usual manner not shown here. By opening the contact 36vgw, since the shaft contact 37 wgw is open, the relay A is de-energized, so that the winding III of the relay Pi is also switched off by opening the contact 97a. If the group selector GW finds a free downstream group selector, which is not shown here, but is equipped in the same way as the group selector GW, the relay Pgw is excited in a known manner via the switching arm gw5 in order to prevent the further switching of the group selector GW and to switch the different wires of the connection path through to the next group selector via the Pgw contacts. Among other things, by closing the contact 42pgw after the free downstream group selector has been assigned via the contacts 35 cgw and 37 wgw corresponding contacts, the relay A is again excited. By closing the contact 97a, the current impulse transmission, that is, the emission of the second series of current impulses for the setting of the downstream group selector, is initiated. This takes place in the same way as the above-described current impulse transmission, the relay Pi checking after each current impulse has been sent via the respective identification line reached whether a negative potential has been applied. This potential is applied to the identification line k13 via the switching arm ew3o on contact 2, the line 8 and the resistor Wi 33 when the second rush current is sent, since the contact 275e2 is now closed instead of the contact 274e3 due to the excitation of the relay E2. The relay Pi finds this potential after the third current surge when testing the identification line k13. However, since the relay Pi checks here, as before, via the resistor Wi ii and the negative potential is applied via the resistor Wi33, there is no current flow sufficient for the excitation of the relay Pi. So the test continues. A fourth and fifth current impulses are sent out. After the fifth current impulse, after the relay is de-energized , the relay Ui is excited via: -, UI, 1314 129h3, 127h2, I23hr, I24ve, i25ie, 88p1, iioci, -f-. By opening the contact 1I2 az I, the previously energized relay H5 is switched off. By closing the contact 1363i, the relay U2 is excited, whereupon, after the relay Ve has become de-energized due to a short circuit across the contact 941e , the relay Ui is switched off by opening the contact I24ve. After the contact 135 u I has been closed, the relay U2 remains in series with the winding I of the relay U3, which is influenced by this, via the contact 132u2. By closing the contact 84u3, the resistor Wi ii is short-circuited. During the impulse-wise testing of the identification lines by the relay Pi, which now occurs again with the further continuation of the impulse transmission, this relay can now be excited via the resistor W133 as soon as it reaches the identification line h13 for the second time, i.e. after a total of eight current impulses. The second current surge transmission for setting the second group selector, not shown, is thus ended. This influences a relay corresponding to the relay Agw. Here, a relay corresponding to the relay Vgw has also been actuated again. In the circuit of the relay Pi running via the identification line k13, the relay K i is excited as after the first current surge transmission. By closing the contact 314k1, since the contact 311e2 is now closed, the relay E i is energized in series with the winding II of the energized relay E 2. By closing the contact 3o8 ei, the relay E i is placed in a holding circuit running across the resistor Wi 53. In the meantime, the relay H3 has been deenergized by opening the contact 88p1, so that the relay K i is again de-energized by opening the contact 91h 3. By opening the contact 314 k I, the relay E 2 is switched off. In the second group selector, not shown, set by the second current impulse transmission just described, after a relay corresponding to the relay Vgw is switched off, the free selection of a third group selector, not shown, is initiated. The winding I of the relay A is temporarily de-energized again until a free third group selector is found, so the relay Pi is switched off again by opening the contact 97a. After reaching a free third group selector, relay A comes over its winding. I again to excite and causes the third current impulse transmission by closing the contact 97a. The current impulse number of this third current impulse transmission is, since contact 276 ei is now closed instead of contact 275 e 2, via the switching arm ew4o standing on contact 2. By means of this switching arm, an identification potential is applied to the identification line kl i via the line 16 and the resistor Wi 36 as soon as the contact 257eh is closed. At first this is not the case. As with the first current impulse transmission, five current impulses are sent out, since the relay Pi is not influenced by any of the identification lines kl i to k15. After the fifth impulse, as in the case of the second impulse transmission, first the relay Ui and then the relay U2 are energized. The relay Uz is then de-energized again, so the relay U3 responds while the relay UZ holds. The resistor Wi ii is again short-circuited via the contact 84u3, so the relay Pi, sending further current impulses via the contact 74ie, checks the identification lines kl i to k15 one after the other without the resistor Wi ii to determine whether, for example, via the resistors Wi 31 to Wi 35 a labeling potential is applied. Since this is not the case either, five more electric pulses are emitted. After this further current impulse transmission, that is to say after ten current impulses, the relay Ui comes to the excitation again as after five current impulses. By opening the contact 135 u I, the relay U2 is de-energized, while the relay U3 continues to hold with its winding II after the contact 136ui is closed via the contact 134u3. By closing contacts 142 u I and 141 u 3 , resistor Wi 12 is short-circuited, so that winding I of relay Eh, which was previously only weakly but now more strongly excited, brings relay Eh to excitement via wire a 2. By closing the contact 2o2 eh the resistor Wi 27 is short-circuited, so the relay Eh also remains energized when the resistor Wi, i2 ' is switched off again. This happens after the relays Ui and U3 are de-energized as a result of the opening of the contact I24ve. By closing the contact 257eh and corresponding contacts (258eh), the lines ii to 2o are connected to the identification lines kl i to kl5 in FIG. In the meantime, the third rush transmission continues, initially with another five rushes; So a total of fifteen current impulses are emitted, since the relay Pi checks via the resistor Wiii after the contact 84u3 has opened and therefore the potential applied to the identification line kl i via the resistor Wi 36 is not sufficient to influence the relay Pi. After the resistor Wi ii is then short-circuited, as previously described several times, the relay Pi then checks the j identification lines kl i to k15 without this resistor from the sixteenth current onwards. As soon as the identification line kl i is checked when the sixteenth current impulse is emitted, the relays Pi and Ki are excited via the identification line kli. This means that the third group selector, not shown, has also come to the setting through sixteen current surges. He then looks for a free transmitter, e.g. B. Ue2, with the outgoing connection line VL '. Due to the assignment of the transmission Ue2 from the upstream third group selector, not shown here, the relay Cue 2 is excited. In addition, the lines are switched through as in the previous group selection levels. Since the contact 51 is closed in some way that is not of interest here when the transformer is ready for operation, the relay Uo is energized. By closing the contact 24u0 the connection is maintained, while the relay Pw is switched off by opening the contact 23u0. By opening the contact 83Pw, as a result of the de-energization of the relay C2, the storage device SPE shown in FIG. 2 is triggered in a manner which is not of particular interest here. A seizure current surge is transmitted from the transmission Uea to the next switching center C, not shown, in a known manner. If the temporary retrieval of the destination identifier arrives from the switching center C reached, as described at the beginning for the switching center B shown in FIG. This causes the winding I of the relay A to be excited, so since the contact 103Pw is now closed, the relay A with its winding II is in a holding circuit via: -, A II, 102a, 100w, 104d, +. After the contact 178a is closed, since the switch arm sw13 is in position 3, the relay Vs is energized via: -, Vs III, E II, sw 13 to 3, 175is, 176pi, 177pw, i78 a, +. The relay F comes to the contact 56 vs for excitation, it adheres f via its contact 57. Sw By standing in position 3 shift arm 12 is first for the repetition of the target mark, the switching arm hw3 standing on the contact i provided. There is now again a current impulse transmission in the game of the relays Je, Ve, Hi to H5 and Pi in the manner already described, but now the number of current impulses of the individual series of current impulses corresponds to the digits of the target identifier. Since the switching arm hw3 is on contact i, the relay Pi is already excited after sending a current impulse via: -, Wi2I, 52a, sw 12 in 3, 321 Pw, hw 3 to 1, 89 h 1, 86 ve, 85 ie, Wi II, Pi I, 1I, - @. With the emission of the one current impulse which is given via the contact 74ie to the relay Auea, which transmits this current impulse to the next exchange, the first series of impulses corresponding to the first digit of the target code is ended. After the relay Pi has responded, the winding III of the relay Vs is switched off by opening contact 176 Pi, among other things. Since the contact 166 f is closed as a result of the previous excitation of the relay F, after the contact 165 vs is closed, the switching magnet Dsw i is excited, so that the switching arms sw ii to sw 14 are in position q. to be brought. By opening the contact 58 dsw i, the relay F is de-energized. In the meantime, relay Pi is in position q as a result of switching arm sw i2. has become de-energized, so that after closing the contact i76pi the winding III of the relay Vs again in series with the winding II of the relay E in position q. of the switching arm sw 13 comes to excitation. Relay F also responds again via contact 56 vs. The identification potential for the second series of current impulses is now applied via the switching arm zw 3 standing on contact 2. As a result, two current impulses are emitted, since the relay Pi is excited via the contacts 85ie, 86ve and goh2 and the resistor Wiii after the second current impulse. By actuating the contact 74ie twice, the relay Aue2 in the outgoing transformer Ue 2 has received two current surges and passed them on to the next exchange. After the excitation of the relay Pi, the second current impulse transmission is ended, the relay Vs being de-energized again by opening the contact 176pi, so that the switching magnet Dsw i receives a further current impulse via the contact 165 ve and the contact 166 f of the relay F, which has now been re-energized receives to the switch arms su! ii to sw 14 to move into position 5. By opening the contact 58 dswi, the relay F is de-energized, while the relay Pi is switched off by switching the switching arm swi2 to position 5. After closing the i76pi contact, the relay Vs is again excited via its winding III; relay F also responds again. The third series of current impulses is now transmitted, which consists of three current impulses, since the identification potential for the excitation of the relay Pi is applied via the switching arm sw 12 in position 5 and the switching arm ew3 on contact 3. A corresponding current surge transmission takes place. After energizing the relay Pi, the relay Vs is de-energized by opening the contact 176pi, so that the switching magnet Dsw i is influenced and the switching arms sw ii to sw 1.4 are in position 6 in the manner already mentioned. The relay F is de-energized by opening the contact 58 dsze @ i, while the relay Pi after switching arms sw ii to sw 1q. is switched off in position 6. In this position, the relay S i is excited via its winding I; the circuit runs over: -, S i I, sw 13 on 6, 175is, 176pi, 177Pw, 178a, +. By closing the contact 67 si, the relay Do already applied earlier via the contact 22 uo is excited via: -, Wi7, 67si, 65o, as4, 22u0, Do I, +. After the contact 13 do has been closed, the relays Do and Uo are held in series with the relay C io via their windings II. By opening the contact 12 do the relays Pa and C are de-energized, so that the relay C i is also switched off by opening the contact 59 o. As a result, the activation of the evaluation device via the activation selector AS is canceled, the switching arms hw i to hw 6 or zw i to zw q or ew i to ew q. brought into the rest position by the interplay of the switching magnet Dhw (io6dhw) and the relay Hi (168M) or the switching magnet Dzw (107dzw) and the relay H2 (170h2) or the switching magnet Dew (io8dew) and the relay H3 (172h3) will. The switch arms sw ii to sw 1q. are brought into the rest position by the switching magnet Dswi (58 dsw i) in interaction with the relay F (166f).

The repetition of the target identifier now takes place in the subsequent one Exchange C a corresponding connection setup. Corresponding switching operations continue from exchange to exchange until the desired exchange has been reached.

If, as initially assumed, there is no free connection line in the line group to be used as the main route, then, since the contact abh is then closed, the relay G is excited via: -, Wi57, abh, ewioo to 2, 296me, 297v, GI, +. By opening the contact 2599 , the relay V is de-energized, while the relay G with its winding II is placed in a holding circuit via the contact 260g. After closing the contact 230v, the relay Fi checks with its winding I, since the switching arm sw 26 is in position 7, via the switching arm;, w8, which is on the contact i, whether there is still a free line group to be used as the first detour Line is available. If this is the case, the contact abu i is open, so that an excitation of the relay F i does not come about. In the meantime, the relay Pe has become de-energized by opening the contact 265 v, so that after the contact 316pe has opened, the relay Me is excited via its winding III. This circuit runs through: -, E3 I, 309e2, 3o7 ei, Wi 53, 32o me, 317 ze @ ew, He III, -j-. The relay Me remains after the contact 315 me is closed via the resistor Wi 30, while the relay E 3 is switched off by opening the contact 320 me. The drive Mewo is switched on by closing the contact 304me '. The EWP selector is moved until the switching arm ewio reaches the contact marked via the switching arm rw5. Since the switching arm rw5 is on contact i according to the recorded target identifier and this contact is wired to contact 3 of the switching arm ew io, the selector EWo comes to a standstill as soon as the switching arm ew io reaches contact 3. The relay Pe is then excited via: -, U5 II, 269g, 266 so, sw 25 in 7, 7w5 on i, ew 1o on 3, Pe, closing the contact 316p6 becomes the winding III of the relay Me short-circuited, so that the relay Me is deenergized. After closing the 32ome contact, the relay E3 responds via: -, E 3 1, 30962, 307e =, Wi 53, 320m6, 317 wew, 316p6, +. The impulse transmission for setting the group selector according to the line group identifier of the first detour is now determined by setting the switching arms ew2o, ew3o and ew4o to contact 3. Since this contact is connected to wire i, the first series of current impulses consists of a current impulse. The second series of current impulses, since the contact reached by the switching arm ew3o is connected to wire 5, from five current impulses and the third series of current impulses, since the contact reached by the switching arm ew4o is connected to the wire 2o, from twenty current impulses. As has already been described in detail in the case of the main route, the current surge transmission is controlled by tapping the identification lines kl r to k15.

If the first detour is also occupied, i.e. the contact abu i is closed, the relay Fi is excited via: -, Wi58, abu i, 7w8 on i, sw 26 in 7, 230v, 214c2, 2i5 dsw 2 , F i I, +. In this circuit, the relay F i responds and causes the switching magnet Dsw 2 to be excited by closing the contact egg f i, so that the switching arms sw 2i to sw 26 move into position 8. By opening the contact 2i5 dsw 2 , the relay Fi is de-excited; it checks via the switch arm sw 26 in position 8 whether there is still a free line in the line group intended for the second detour. If this is the case, contact abu 2 is open. In the meantime, as long as the contact 24o dsw 2 was still closed, the relay S 4 has been energized via the switching arm sw 24, which has moved into position 8. The circuit runs through: -, S4II, S 5 1I, 247 s 5, sw 24 in 8, 24o dsw 2, - [ . After opening the contact 24odsw2, the relay S4 holds itself through: -, S411, 250s4, 249s3, 252s0, Wi 2g, 255c2, Since the relay Pe has become de-energized while the switching arm sw 25 is switched to position 8, opening the Contact 316p6 the relay Me again via its winding III for excitation and see via its contact 315 me in a holding circuit. When contact 32ome is opened, relay E 3 is de-energized. By closing the contact 304m6, the drive Mewo is switched on, so that the selector EWo is advanced. This progression goes on for so long. until its switching arm ew io reaches the contact marked by the switching arm yw 6. Since the switching arm yw6 is on contact i and this is wired to contact 4 that can be reached by the switching arm ew io, the selector EWo is stopped as soon as this contact is reached. Then the relay Pe is excited via: -, U 5 1I, 269 g, 266 so, sw 25 in 8, yw 6 on i, ew io on 4, Pe, -i-. The Mewo drive is switched off by closing contact 305P6. The relay Me is short-circuited by closing the contact 316p6. After closing the 32ome contact, relay E3 responds again. The current impulse Jung for setting the three group selectors to the line group in question for the second detour includes three current impulse series, of which the first current impulse series through the switching arm ew 2o standing on contact 4, the second current impulse series through the switching arm standing on contact 4 ew3o and the third series of impulses is determined by the switching arm ew4o on contact 4. The wiring of the contacts just mentioned with the wires from the number of wires i to 2o coming into question for the current surge transmission is not shown here. As has already been described several times before, each individual series of current impulses is terminated by the response of the relay Pi via the respective marked wire.

If the second detour should also be occupied, i.e. the contact abu2 is closed, the relay F i is energized after the switching arm sw 26 has been switched to position 8 and causes the switch to be switched to position g. The relay S3 is energized via the temporarily closed contact 24o dsw 2 in order to place itself in a holding circuit after the contact 248s3 has closed via: -, S 3 II, 248s3, 252s0, Wi 2g, 255c2, +. The switching arm sw 25, which is in position g, provides the switching arm yw7, the position of which is now sought by the switching arm ew io. If the switching arm ew io reaches the contact 5 marked by the switching arm yw7, the impulse transmission is thus determined for the third detour.

If the third detour should also be occupied, the relay F i is again energized via the switch arm sw 26 located in position g, in order to bring the control switch into position io. The relay So responds via the temporarily closed contact 24o dsw 2; it lies in a holding circle above: -, SOI, 253s0, Wieg, 255c2, +. After the contact 267s0 has been closed, the identification potential is not applied to the contact bank accessible from the switch arm ewio via one of the switching arms yw5 to yw7 via winding II of the relay U5, but the corresponding contact is designated directly. In the present case this is the contact i. The selector EWo sets itself to this contact after switching off the relay Pe on the switch arm sw 25, whereupon after its shutdown by re-energizing the relay Pe, the current impulse transmission via the switch arms ew2o, ew3o and ew4o in position i according to a corresponding wiring with three of the Lines i to 2o is determined. This creates a connection path to an auxiliary station via the three group selectors. It can therefore be seen that initially after the destination identifier has been recorded, the rush transmission for the main route, if it is occupied, the rush transmission is determined for the first, if it is occupied for the second and finally for the third detour. The detour sequence depends on the position of the control switch from which the switching arms yw5 to 7w7 ygnd yw8 to ywio are made available. Since in the present case this provision was made from position 7, the first detour was made available via position 7, the second via position 8 and the third via position 9 through the switching arms mentioned. If detours are used, the rest of the setup takes place after the power surge is sent in the same way as is described for the main route, namely by repeating the recorded destination identifier by the respective building switching center until the switching center corresponding to the destination identifier is reached. When hiring an auxiliary position, an officer is reached who can then deal with the liaison order in some way.

If the destination identifier 225 is added instead of the destination identifier 123, which identifies an exchange that is somewhat closer to exchange B than the exchange desired for the connection described above, the switching arms hw i to hw 6 are set accordingly on contact 2 , the switching arms between zwi to zwq. on contact 2 and the switching arms ewi to ew4 on contact 5. Since this target identifier is one in which the corresponding line group identifier in the exchange B shown is not after the first digit as above, but after including the first and second digits is to be determined, is the contact 2, which is from the switching arm hwq. corresponding to the first digit of the target number is reached, not with positive potential, but via the switch arm zwq. after reaching segment i to io and connected to negative potential via relay U i. If the target identifiers of the second group of hundreds are converted into line group identifiers in a different group of memory devices than in that to which the memory device SPE shown in FIG ugw io connected in the converter group selector UGW, as well as the other lines (corresponding to kl i to kl5, hl 2, ai to a 3) from contacts of this contact group, since the converter group selector UGW then has to look for a free storage device in this group. However, if the group of memory devices to which the memory device SPE shown in Fig. 2 belongs, because it is not sufficiently used by the first group of hundreds of target identifiers, also converts the second group of hundreds, then the wire going out from Kbntakt 2 of the switching arm hw 6 also connected to the contact group II, while the remaining lines kl i to k15 and a i to a 3 are routed to the contacts 2 of the second contact group as well as to the contacts 2 of the second contact group, as indicated by dashed lines in FIG. The converter group selector UGW also searches in the same group of memory devices to which the memory device SPE shown in FIG. 2 belongs. If, for example, he finds the memory device SPE shown in FIG. 2, then the hundreds line hl? - is also connected to it, which would otherwise lead to a memory device of another group. The storage device SPE shown in FIG. 2 is assigned in the same way as previously described, whereupon after the first digit has been recorded with the beginning of the second digit, i.e. as soon as the switching arm has reached the segment i to io and the switching arm sw2i is in position r, relay Mu via: -, Ui, zwq. on i to io, 137 u 3, hw4 on 2, 139 k, i5o dugw, ugw 8 on 2 in II, a 2, sw 21 in 1, 198 f i, Mu I, +. The relay Mu holds itself after closing the contact 183 mu through its winding II and the resistor Wi 22. In the circuit just mentioned, the relay U i (Fig. I) is also excited, so that after the contact 136u1 is closed, the relay U2 responds via: -, U2, 133u3, 136u1, 88pi, iioci, +. By closing the contact 216mu (FIG. 2) the relay F i responds, so that the relay U1 is de-energized when the contact 198f i is opened. After the contact 135 u I is closed, the relay U3 responds. The relay U2 is kept in series with the relay U3. After the excitation of the relay Mu, the drive Muv is switched on by closing the contact 3oomu, so that the selector UW (hundred-part motor selector) is advanced. Since the switch arm zw3 is on contact 2 according to the second digit of the recorded target identifier, a negative potential is applied to the identifier line kl2 via the switch arm ugw2, which brings the selector UW to a standstill as soon as the switch arm uw i reaches contact 21. Then the relay Pu is excited via: -, Wi2i, 75 dugw, Sw I2 in 2, 76u2, zw 3 on 2, ugw 2 on 2 in II, k12, Wi 32, 18o y, uw i on 21, sw 2q. in I, 238s5, 2q.1 mu, Pu, +. The Muw drive is switched off by closing contact 301 Pu. By closing the contact i85 pu, the winding II of the relay Mu is short-circuited, so that the relay Mu is de-excited. By opening the contact 2q.1 m3 the relay Pu is de-energized. After the contact 298mu is closed, the switching magnet Dsw2 responds, so that the switching arms SW 21 to SW 26 move into position 2. The relay F i is de-energized by opening the contact 215 dsw 2. The switching magnet Dsw 2 is switched off at contact 299 fi. After closing contact 235 mu, the following circuit is established: -, KI, 8i e, 8o e, 82 ie, 1q.8 dugw, ugw 6 to 2 in II, H12, etc. on 21,235mu, R, +. Here only relay R responds. By closing the contact 233r, the relay R places itself in a hold circuit. By opening the contact 18or, the identification line k12 is disconnected, with the contact 21 of the switching arm uw i and the contacts 12, 22 etc.W. 02 of the switching arm uw2 must be connected to negative potential via the resistor Wi55. With the arrival '. of the first single current impulse of the target identifier, through which the switching arm ewq. reaches segment i to io, relay Mu is excited via: -, UI, ew q. on i to io, 138u3, -hw q. on 2, 139k, 15o dugw, ugw 8 on 2 in II, a2, sw 2i in 2, 198 f i, Mu i, -f-. The relay Mu places itself with its winding II in a holding circuit; at contact 3oomu it switches the drive Muw on again, so that the selector UW is advanced further. Due to the relay U i, which is excited in series with the winding I of the relay Mu, the relay U2 is de-excited by opening the contact 135 u I. Relay U3 is held via contacts 136ui and 134u3. If the relay F1 (I) responds as before after the contact 216mu is closed, the relay Ui on contact 198 fi is activated. and thus the relay U3 is de-energized. Since the switching arm 2 is provided via the switching arm sw 24 in position 2, the selector UW runs until contact 22 is reached. Then the relay Pu is excited via: = -, Wi55, i79y, uw2 on 22, sw24 on 2, 238s5, 241 mu, Pu, -E-. The Muw drive is stopped by closing the 3oiPu contact. Closing the i85pu contact de-excites the Mu relay. By closing the contact 298mu, the switching magnet Dsw2 receives a current impulse, so that the switching arms sw21 to sw26 move into position 3. The relay My is now excited via: -, MrII, 2igoa, sw 23 in 3, 229v, 21402, 2i5 dsw 2, F i I, +. By closing the contact i98my the RelaisMy puts itself with its winding III in a holding circuit. By closing the contact 302my the drive Myw is switched on, so that the selector RW starts up and is switched on until its switching arm 7w 2 reaches contact 2, which is wired to the contact 22 reached by the switching arm uw4 via the UK2oi . Then the relay Py is excited via: -, KI, 81e, 8oe, 82ie, 148dugw, ugwb on 2 in II, h12, uw4 on 22, UK2oi, yw2 on 2, o2, oi, Py, -f-. By closing contact 303Py, drive Myw is stopped: while relay Myw is switched off by closing contact 188py. After the 256my contact is closed, the relays K, 01 and 02 also respond. As will be shown later, the possibility of detour 4 is determined by the excitation of the relays 01 and 02 in the circuit mentioned. As a result of the opening of the contact 52k, the relay Vs, which is kept energized by the switching arm sw 14 in position 2, is de-energized, so that after the contact 165 VS is closed, the switching magnet Dsw i is excited and the switching arms sw ii to sw 14 moves to position 3. By opening the contact 58 dsw i, the relay F is switched off. In the meantime, the switching arms sw 21 to sw 26 have also been switched to position 4, in which, as already described, the relay Me is energized in order to activate the selector EWo by switching on the drive Mewo via the contact 304me set. The selector EWo runs until the switching arm ew io reaches the contact 2 marked by the switching arm 7w4. Via this, the relay Pe, as already described in your previous connection setup, gets excited and stops the selector EWo. The impulse transmission is the same as in the connection setup described above, since the same main path to the following exchange C is to be used to establish the desired connection as in the first connection case. The first detour is now determined in the control switch position 8 (sw 25) via the switch arm yw 6, the second detour in the control switch position 9 via the switch arm yw7 and the third detour in the control switch position io via the switch arm 7w5; while in the previous connection the detours were marked one after the other via the switching arms yw 5, yw6 and yw7. Therefore, as will be explained later, in the present case the starting position of the control switch sw 25 for determining the detour sequence is position 8 and not position 7 as in the connection described above. Since the first and third detour runs over the same line groups as the first and second detour of the previous connection, the contacts 2 that can be reached by the switching arms -7w5 and yw6 are connected to the contacts i of these switching arms, so that they can be reached by the switching arm ew io Contact bank to identify the same contacts as for the first connection. The second detour for the present connection runs via a different line group, so that the contacts reached by the switching arm yw7 determining this detour with another contact that can be reached by Schaltann ewiö, e.g. B. 6, is connected.

First, it is now checked whether the connection to the next switching center, which is to be passed through according to the recorded destination identifier, is free, ie, the main route in question is first checked; this is done, as already described in the previous connection setup, through 'the relay G by means of the winding I via the switching arm ewioo. This switching arm is in accordance with the identification by the setting of the selector RW on contact 2, as was also the case with the previous connection, since the main path is the same as with the previous connection. If the main path is free, the relay G, since the contact is then open abh, does not become excited. Depending on the position of the switching arms ew2o, ew3o and ew4o on contact 2, according to its wiring with the identification lines kl i to k15, a corresponding current impulse transmission takes place to set the group selector shown in the upper part of FIG Connecting line.

If the main path is occupied, i.e. the contact abh is closed, the relay G is energized via its winding I, so that appropriate processes are now initiated, as was already described when establishing the previous connection, ie it is now checked which line group of the available detours contains a free line to another exchange via which a path to the desired exchange is to be set up according to the recorded destination identifier. The difference now compared to the first-mentioned connection establishment is that the detour test does not begin in control switch position 7, but position 8 forms the starting position for this connection case. While during the previous connection setup, due to the excitation of relay 0 i, relay F 2 (2876i, 288a2, 4103) to determine the detour option i was excited and by opening contact 221f 2 in the control switch position 7 reached by switching arm sw 23, a further step-up of the control switch prevented, the contact 22I f 2 has now remained closed, because relay F3 was not energized to determine the detour options due to the energization of relays 0 i and 0 2. This circuit runs over: -, S41, 283s5, 284v, 285 me, 287 oi, 289o2, ew7o on 2, Wi 44, Wi 45, F 3, --I-. The relay S4 does not respond via the two resistors Wi44 and Wi45. By energizing relay F3, contact 223f 3 is opened, so that after position 8 is reached (position 7 is overrun) by switching arm sw 23, relay F i does not respond again, so that further switching of the control switch is initially prevented. The starting position for the detour test is therefore position 8, so that the first detour via the switching arm sw 25 in position 8 and the switching arm rw 6 on contact 2 is determined. If this detour is free, that is , if the contact abu 2 is open, the relay F i in the test circuit otherwise running via the switch arm sw 26 in position 8 is not energized with regard to the occupied state of this detour, so that the control switch in the position 8 stops. The selector EWo, which has since been restarted as above, is now looking for the contact identified by the switching arm rw 6 via the switching arm ew io. This is contact 4. This means that the first detour for this connection setup is the detour that formed the second detour in the previous connection. According to the new setting of the EWo selector, the switching arms ew2o, ew3o and ew4o, which take effect one after the other, cause the corresponding impulse transmission.

If the detour just mentioned is occupied, i.e. the contact abu2 is closed, the relay FI is excited via: -, Wi5g, abu2, rwg on 2, sw 26 in 8, 23o v, ZI4C 2, 2i5 dsw 2, F i I, -f-. The control switch is moved to position g by influencing the switching magnet Dsze, 2 after the egg fi contact is closed. As already described earlier, the relay S4 is energized via the switch arm sw24. In the position g, the relay F i checks via the switching arm sw 26 whether the second detour in question is free, ie whether the contact abu4 is open. If this is the case, the control switch remains in this position for the time being. The switch arm sw 25 in position g and the switch arm yw7 on contact ? The switching arm ew io adjusts itself to the contact 6, since this is marked in the form described. As a second detour, a detour via a switching center comes into question, which was not used for the further connection establishment in the detours of the previous connection. The second detour is different in the present connection case. A corresponding current surge is sent according to the wiring of the contacts 6 reached by the switching arms ew 2o to ew4o with the identification lines hl i to hl 5, which is not shown here.

If the second detour should also be occupied, since the contact abu4 is then closed, the relay F i is energized via the switch arm sw 26 in position g and causes the control switch to switch to position io. The relay F i, which is deenergized again, now checks via the switch arm sw 26 in position io whether the contact abu i is open or closed. If it is open, i.e. the third detour is free, the control switch remains in the!, Position io. As before, relay S3 has been energized via switch arm sw24. The switch arm sw 25 in position io and the switch arm rw 5 on contact 2 are now used to control a new setting of the selector EWo with the help of the switch arm ew io in order to determine the line group identifier for the detour to be used as the third detour and a corresponding one To initiate power surge transmission. This detour corresponds to the detour that was provided as the first detour for the previous connection.

If this detour is also busy, it will be forwarded of the control switch, so that via the switch arm sw 24 when the contact 24o dsw 2 the relay So responds and a setting of the selector as in the previous one Fall to an auxiliary place by means of the contact 267 so brings about.

In the previous two connection cases (destination code 123 and 225), the detour option i or 4 was selected by energizing relay 0 I or relays 0I and 02, with relay F2 or F3 being actuated. Other options can be selected by wiring the remaining lines differently with other contacts on the switch arms ew 6o to ew go, possibly using a different combination of influencing relays OI to 03 (switch arms ywi to yw3). To select option 7, appropriate wiring is established with line 7 so that relay F4 responds. Since contact 225f 4 is now open instead of contact 223f 3, the control switch is not held in position 8, but only in position g, since in this position contact 225f 4 prevents the relay F i from being energized again for further switching . The individual detours are provided from the control switch position g onwards, i.e. according to the wiring that can be reached via the switch arm sw 25, the first detour is identified in position g via the switch arm yw7, in position io the identification of the second detour via the switch arm yw5 and in position ii the identification of the third detour via the switching arm yw6, each of these switching arms being in a specific position corresponding to the respective target identifier recorded in order to thereby control the setting of the selector EWo and thus to initiate the impulse transmission corresponding to the line group identifier. The main path to be used first is always determined via the switching arm yw 4. If the detour option io is selected so that the relays F3 and Fu are excited, the control switch is advanced to position ii. There is no stopping in position 7 because the contacts 22o fu and 22i f 2 are closed, in position 8 because the contact 222 fu is closed, and in position g also not because the contacts 224 fu and 225 f q. are closed. The position io is overrun. Position ii (contact 226 f 3 open) is the starting position for providing the available detours, namely in position ii the first detour via the switching arm rw6, in position 12 the second detour via the switching arm 7w5 and in position 13 marked the third detour via the switch arm rw7.

From this illustration it can be seen without further ado that there are three detours available for the options i, q., 7, io, 12 and 14. With options 2, 5, 8, 11, 13 and 15, only two detours are available, because here, due to the lack of one resistor (Wiq.1, Wi qq, Wiq.7, Wi 50, Wi 52, Wi 5q.), Except the corresponding F-relay also the relay S q. responds which, after the first detour has been checked, enables the relay S3 to be energized, which, after the second detour has been checked, allows the relay So to respond in order to provide an auxiliary place. With options 3, 6 and g, no resistor is switched on, so that after the temporary response of the relay S q. the relay S 3 responds, which after checking a single detour allows the relay to respond in order to provide an auxiliary place. In the case of option 16, the relay So comes through its winding II immediately after the occupancy test of the main path 'to excitation, so that the auxiliary station is identified even when the main path is occupied.

If, instead of the connections described above, a connection to a local exchange of the exchange B shown is to be established, the three digits of the destination identifier must first be recorded before the destination identifier is converted into a corresponding line group identifier. Is z. B. assigned to the desired local exchange the target identifier 312, the switching arms hw i to hw 6 on contact 3, the switching arms zwy to zwq. on contact r and switch arms ewi to ewq. set to contact 2. If the target identifiers of the third group of hundreds are converted into line group identifiers in a special group of storage devices serving this group of hundreds, the line going out from contact 3 of the switching arm 6 is connected to the contact group III of the switching arm ugv) io in the converter group selector UGW, as well as the other lines (corresponding to kl i to k15, h13, a i to a3) also depart from the contacts of this contact group so that the converter group selector UGW can search for a free memory device in this group of memory devices using the switching arm ugw g: but should the group of memory devices to which the memory device SPE shown in Fig. 2 belongs, for example because it is not sufficiently used by - the first and second group of hundreds of target identifiers, also convert the third group of hundreds of target identifiers into line group identifiers, so that of contact 3 of the switching arm hw 6 outgoing wire also connected to the contact group III, while the other lines kl i to kl5 and a i to a 3 are routed to the contacts 2 of the third contact group as well as to the contacts 2 of the first and second contact group, as shown in FIG is indicated by dashed lines. The converter group selector UGW therefore also adjusts itself to the memory device SPE of FIG. 2 if this is the first free one. The hundreds line h13 is then also connected to the memory device SPE in FIG. 2, which would otherwise lead to memory devices of another group. The memory device SPE is allocated in the same way as described above. As soon as the switching arm between the contact segment i to io is reached and the switch arms sw21 to sw26 are in position i, the relay Mu responds (switch arm sw2i). By closing the contact 183mu, the relay Mu places itself with its winding II in a hold circuit. As before, the relay U i is excited via the excitation circuit of the winding I of the relay Mu, which, after the contact 136 ui is closed, also causes the relay U2 to respond. After the excitation of the relay Mu, the relay F i is excited via the contact 216mu, so that the relay Ui is de-energized by opening the contact 198 fi. After the contact 135u1 is closed, the relay U3 responds via its winding I; the relay U2 holds. In the meantime, the drive Muw is switched on via contact 3oomu, so that the selector UW runs. Since the switching arm z73 has reached the contact i according to the second digit of the target identifier, negative potential is applied to the contact ii accessible by the switching arm uwi via i this switching arm and the switching arm ugw i and the identification line kl i. As a result, the selector UW is advanced until this contact is reached, since then the relay Pu is excited via: -; Wi2i, 75 dugw, sw i2 on 2, 76u2, zw 3 on i, ugw i on 2 in II Ikl i, Wi 31, 18 iy, uw i on ii, sw 2q. in i, 238s5; 241mu, Pu, +. The Muw drive is stopped by closing the 3oiPu contact. By closing the contact 185 Pu, the winding II of the relay Mu is short-circuited, so that the relay Mu is deenergized. The voter UW has adjusted to contact ii according to the second digit of the target identifier. After the relay Mu is de-energized, the switching magnet Dsw 2 is energized, since the egg fi contact is closed. The switching arms sw 2i to sw 26 are brought into position 2. By opening the contact 215 dsw 2 , the relay F i, which has held itself after the de-energization of the relay Mu via the contact 2i8 fi, is de-energized, so that the switching magnet Dsw2 is switched off by opening the contact egg fi. After the contact ig8 fi is closed again after the de-energization of the relay Fi, the relay U i responds in series with the winding I of the relay Mu via: -, Uz, ew4 on segment i to fo, 138u3, hw4 on 3, 139k, 15o dugw, ugw 8 on 2 in III, a2, sw 2i in 2, 198 fi, Mu, +. By opening the contact 135u1, the relay U 2 is switched off, while the relay U3 with its winding II continues after the contact 136u1 is closed. Since the contact 216mu is closed in the meantime, the relay Ff is again energized via the switch arm sw 23 which is in position 2. By opening the contact 198 fi, the relay Ui is de-energized, while the relay Mu continues to hold through its winding II. By opening the contact 136 ui, the relay U3 is switched off. After the contact 3oomu is closed, the drive Muw is switched on again, so that the selector UW runs again, and the check for the marked contact is now carried out by means of the switching arm uw2. Since the contact i2 is identified via the identification line k12 according to the third digit of the recorded target identifier via the switching arm ew3 on contact 2, as soon as this contact is reached, the relay Pu is excited via: -, Witz, 75dugw, swi2 on 2 , 77u2, ew3 on 2, ugw 2 on 2 in III, k12, Wi 32, 18o y, uw 2 on 12, sw 24 in 2, 238s5, 241 mu, Pu, -E-. The Muw drive is stopped by closing the 3oiPu contact. By closing the contact 185Pu, the relay Mu is de-energized, so that after the contact 2g8 mu is closed, the switching magnet Dsw 2 is energized and the switching arms sw 2i to sw 26 are in position 3. Now the following circuit is created: -, KI, 81 e, 80 e, 821e, 148 dugw, ugw 6 to 2 in III, h13, uw 5 to 12, 0A I, F i III, sw 24 to 3, 24o dsw 2 , +. In this circuit, the relays K and 0A are excited. By closing contact 2360a , relays 0A and K are held. After the contact 2540a is closed, the relay So is excited via: -, So I, 2540a, 0A II, 255c2, +. By closing the contact 236 oa the relay F i (III) is switched off, so that the following circuit is established -, Wi 26, igg me, Eh I, Wi 27, 203 g or 204v, 205 oa, 2o6 f i, sw 2i in 3, a2, ugw 8 on 2 in 11I, 15o dugw, 140 k, Wi 12, EI, K III, - + -. The relay E responds. After the contact 68k was closed, the group selector GW was assigned as above and the impulse transmission was prepared by the contact 96e. An excitation of the relay My is prevented by opening the contact Zig oa, so that consequently the selector RW is not set in motion; In addition, this contact prevents the relay F i from being energized and the switching arms sw 2i to sw 26 switched to position 4, so that relay Me, which is otherwise energized after the control switch has been switched to position 4, is also prevented , remains de-energized. As a result, the voter EWo does not come to an end. The current impulse transmission in question for the desired connection, i.e. the line group identifier for setting the group selector to the connection path in question for the local exchange, is now determined via the rest position of the switching arms ew2o, ew3o and ew4o. These contacts are wired in a certain manner, not shown here, with certain lines under the lines i to 2o in order to control the current surge transmission via the identification lines kl i to kl5 as in the previous cases. Since the contacts igoki, ig5oa and 194e1 have been closed after the third series of impulses, the relay S i is excited via: -, K i II, W124, 193e2, Zg4ei, Zg5oa, igoki, ai, ugw7 to 2 in 11I, 149 dugw, 143 b, S i II, S 2, +. The relay S 2 does not respond in this circuit. By closing the contact 67s1, corresponding switching processes are initiated as in the connections described above. Since a connection path to the local exchange of the exchange B shown is used, there is no incentive to repeat the destination identifier from this exchange. The contact za is therefore not closed, so that the relay A to initiate the target identifier repetition does not come to excitation. The relay Do comes, as with the previous connections, to switch off the evaluation device.

If the connection path leading to the local exchange is busy, the relay G responds as otherwise when a main path is busy via its winding I, since the contact 295 and the corresponding busy contact abo of the local connection path are closed. By opening contact 259g, relay K is de-energized, so that after closing contact 230v, relays Me and Ff are energized via: -, Me I, sw26 to 3, 230v, 214C2, 215 dsw 2, F i I, - + -. By closing the egg fi contact, the switching magnet Dsw 2 is excited so that the switching arms sw 2i to sw26 move into position 4. By closing the contact 304me, the drive Mewo is switched on, so that the selector EWo is advanced until the switching arm ew io- finds contact i, which then creates the following circuit: -, U5II, 269g, 267s0, 270u4, ewio to i, Pe, -E-. In this circuit, among other things, the relay Pe responds in order to shut down the drive Mewo by closing the contact 315pe. This setting of the selector EWo determines the line group identifier for the auxiliary place, so that the selector GW shown in the upper part of FIG.

If a local switching center is to be reached after switching center C, not shown here, downstream of the shown switching center B, the selector UW is set so that the switching arm uw5 reaches contact 13 after receiving a corresponding target code (e.g. 313). This contact is wired to contact 3 of the switching arm yw3 via the wire UK5oi and the resistor Wi 46. The selector RW is now set to contact 3 as a function of this target identifier (uw 5 to 13) and the relay Pr is energized via the switching arm yw 3 on this contact in order to stop the selector RW. The relay My is, as usual, switched off, so that the relay 03 responds after the contact 256my has been closed, while - the relay 0 r does not become excited because the resistor Wi46 is in the circuit mentioned. In the tax damage position 4, the winding II of the relay Me is influenced, so that the selector EWo is set in motion to come to the setting according to the setting of the selector RW. Since an identification potential is applied to the contact 7 which can be reached by the switching arm ew 1o via the switching arm yw4 and the resistor Wi 62, the selector EWo runs until this contact is reached; Then the relay Pe is excited via: -, U5 I, 265v, yw4 on 3, Wi62, ewro on 7, Pe, -E-. The relay U5 is not energized in this circuit due to the switching on of the resistor Wi 62. According to the setting of the switching arms ew 2o, ew 30 and 6w40, the determination of the current impulse transmission takes place according to the line group identifier of the connection path leading to the next exchange, namely a line group (first impulse series ew 2o six, second current impulse series ew3o eleven and third current impulse series ew4o six Current surges) with so-called through lines, which are also used for the connection traffic to exchanges, which pass through the exchange C, not shown. When such a line group is busy, detours are used in the usual way, in that the corresponding line group identifiers are determined in the manner already explained several times by other setting of the dialer EWo. The already mentioned non-excitation of the relay U5 indicates that the next exchange, that is, the exchange C, is the end-of-line exchange for the desired structure. If the same traffic direction, i.e. switching center C as the final switching center, is not desired by an upstream switching center of switching center B shown, but such a connection is to be established by a local switching center of switching center B shown, then the connection path is only between the switching centers B and C runs, not a group of lines with through lines are used, i.e. not those that also serve the connection traffic to remote switching centers, but so-called end lines are used. In order to determine the line group identifier for such end lines, the contact 18o is closed when the switching center B shown is occupied by one of its local switching centers, so that the relay B via its winding I is excited by the negative potential applied via this contact and the resistor Wi 2. Closing contact 79b creates the following circuit: -, B II, 79b, r47 dugw, ugw 5 to 2 in III, k15, U4 II, sw 25 in o, 266 so, 268g, -f -. By closing the contact 264u4, the relay U4 with its winding III is in a hold circuit. In the meantime, after the target identifier 313 has been recorded, the selector UW sets in, so that the switching arm uw5 reaches contact 13 as before. This contact is wired via wire UK5or to contact 3 of switching arm 7w3 via resistor Wi46. The selector.RW runs as soon as the relay My in the control switch position 3 is excited via its winding II. As soon as contact 13 of Schaltannes uw 5 is reached, relay Py responds and stops selector RW by closing contact 303p1. By closing the contact r88pr, the winding III of the relay My, through which the relay was held, is short-circuited, so that the relay 0 3 responds after the contact 256my is closed, while the relay 0 r is not excited because in the mentioned circuit the resistor Wi46 is. In the control switch position 4, the winding II of the relay Me is influenced, so that the selector EWo is also set in motion to come to the setting according to the setting of the selector RW. It adjusts itself to the contact 7 marked by the switching arm yw4 standing on the contact 3. As before, this then causes the relay Pe to be energized to stop the selector EWo, with the relay U5 being again prevented from being energized by the resistor Wi62. However, since relay U4 is now excited, while in the previous connection case, which went in the same direction but had a different origin, relay U4 was not excited, the third series of current impulses is not triggered by switching arm 6w40 (contact 7 six current impulses), but determined by the switching arm ew5o (contact 7 five current surges). With this setting of the group selector of the connection path, a so-called end line to the downstream exchange C is achieved, while in the case in which such a connection was to be established in the same direction but from an exchange upstream of exchange B, the third series of current impulses was six current impulses included. As can be seen from these two current impulse transmissions, the end lines are located in a contact group which is in front of the group of through lines. As a result, if the corresponding group selector cannot find a free end line, a through line can be used as a temporary aid for the connection case just described by automatically turning it further. Should the through lines be occupied, then by a then closed twist-through contact, as he z. B. is shown for the group selector GW through the contact 39 dk, the relay B via its winding I is excited. By closing the contact = 44b, since the relay R is excited via the contact 232my when the selector RW is started and is maintained via the contact 233y, the following circuit is established: - Wir3, 144b, I49dugw, ugw7 on 2 in III, ar , 189 k 1, _ 192 y, G III, R II, -f-. In this circuit, among other things, the relay G is excited and, as in the previous cases, causes detours to be made available via its winding I after it has been excited, insofar as these are available to the downstream switching center C, possibly via other switching centers, in order to then reach the desired local exchange of the downstream exchange C via this.

Claims (3)

PATENT CLAIMS: x. Circuit arrangement for telephone systems with Selector operation according to patent 857 075, characterized in that to determine the Line group to be used in the same direction of traffic serving identification cores (e.g. 5 and 6, Fig. 2) that can be reached via various switch arms (ew2o to ew5o) Contacts of dialing devices that can be set according to the traffic direction marking (EWo) are connected and switching devices (U4, U5) according to their influence by means of switching devices (0 1 to 0 3) and by switching means which are influenced by the traffic direction marking (B I, Fig. R) one of these switching arms for determining the corresponding line group provide. 2. Circuit arrangement according to claim r, characterized in that in spite of the same setting that can be set according to the traffic direction markings Selection device (EWo) depending on the selection of one of the switching arms (ew4o or ew5o) a different number of current surges is emitted (switching arms ewq.o, contact 7 six power surges; Switching arm ew5o, contact 7 five current surges). 3. Circuit arrangement according to claim r, characterized in that depending on the connection of the switching arms an end connection line or a through line is selected.