DE1084776B - Circuit arrangement for reversing two-wire communication lines - Google Patents

Description

In telecommunication systems, in particular telephone systems, it is known to use a two-wire line Relay trigger certain switching processes. For arrangements in which switching operations are triggered Depending on the direction of the current flowing in the line, it is known to use the relay rectifier upstream and / or in parallel and optionally cancel the directional dependency achieved thereby. In the known devices, the directional dependency is canceled by additional relays.

For the audio-frequency speech streams, the switching means in the line are used for the purpose of reducing the Resistance is generally bridged by capacitors. The disadvantage here is that the in the Line lying alternating current resistance is frequency dependent and accordingly alternating currents different Frequency attenuated differently.

In order to avoid this disadvantage, it is known that the ones used to initiate certain switching processes are known Relay via an amplifier to a resistance in the line loop that is negligible for the speech currents to turn on. In many cases, however, the complexity of an amplifier appears to be too expensive, and it is also am Location of the relay to be influenced, as is required in all other known arrangements, a Provide a voltage source from which the relay switched in or on the line loop is controlled Circles are fed.

The invention now relates to a circuit arrangement for reversing telecommunication lines, their wires individually or in a loop for transmitting control criteria for checking the line status and serve to transmit the language and where there is no own operating power source at the location of the reversing point is provided. The object of the invention is to create an arrangement which is known with the disadvantages Orders is not affected. This is achieved in that the in series with a device to be controlled and a rectifier arranged between the two wires of the communication line a winding and the series connection of another rectifier arranged in one wire of the telecommunication line the other winding of a polarized relay with two rest positions alternately by means of a changeover contact short-circuit this relay on the two wires depending on the current direction.

Due to the simultaneous short-circuit of the winding located in one wire and the rectifier connected in series with it, it is possible to pass the speech frequencies over the switchover point without being attenuated. Since the short-circuit of the relay winding is brought about by a separate contact of the relay, no additional relays are required for connecting the speech wires. Because the short circuit of the relay circuit arrangement to reverse
two-wire communication lines

Applicant:
Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Dipl.-Ing. Richard Grote, Munich,
has been named as the inventor

development also takes place with their own excitement, z. B. the connection of the speech wires to a participant in a closed circuit when testing the subscriber line or in a ringing circuit be brought about to call a subscriber. By continuously switching on the in bridge to the Wires connected in series with the other winding and one to be influenced at the location of the switchover point Device lying rectifier is an influence of said device, the z. B. a The surge receiver can be used for other purposes via the line loop in one of the polarity of the rectifier Opposite current direction avoided closed circuits.

According to a further embodiment of the invention is used to excite the other arranged in one wire Winding of the polarized relay an alternating current source, which by means of a series-connected direct current source, ζ. B. the official battery, the one winding of the polarized relay arranged between the two wires is not can affect. This makes it z. B. possible with a Rufstromquelle to call one at the changeover point connected participant the wires to this participant by short-circuiting the lying in the wire Winding and the rectifier connected in series with the latter to be switched through.

When using the invention for reversing two-wire connecting lines between a selector star and a dial star transmission in which the dial star switch to be controlled is in series with that between the two Cores lying winding of the polarized relay is, according to a further embodiment of the invention, the thus in Rectifiers lying in series are biased in reverse direction when the supply circuit is closed. This is how it is

009 549/100

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possible to influence the selector star switch by setting one selector star and one transmission each,

to prevent the alternating speech currents. The representation of switching means of a second selection

To after the end of a conversation without a star, a second transmission, a caller

delay an immediate switchback of the dialer dialer and one line dialer was switched to the

switch to the idle state, switches 5 confessionally essential details limited,

a pulse for reversing the connection line in the case of the arrangement shown in the drawing,

as can be seen from FIG. 1, the subscriber TNl

State at the same time the selector star switch by one to TiVlO via an individual branch line ZLl to

Step forward. Reasonable because the line concentrator generally ZLlO to the two Wählsterne WSTA and WSTB

Several windings of relays are to be excited in series, io switches, which are shared by all participants via one each

it is useful to generate reversing lines or main lines HLa, HLb with the transmissions Uea

Switching pulses a charged capacitor and Ue b are connected. The outgoing traffic is winding

during the impulse in series with the direct current from the call searcher AS , in its contact bank

source, e.g. B. the office battery to switch. a step is provided for each transfer. In the

In the drawing, an embodiment of the 15 contact bank is the processing of the incoming

Invention shown. Two dialing stars are shown, whereas the LW line selector serving traffic is for

which one of one of two dialer star transmissions provided each subscriber with an individual exit,

off for connecting a connection to a connection between a subscriber and a

calling or a called subscriber. free main line as well as a connection of an outlet

The switchover point is located in the selector star itself. The 20 ganges of the line selector with a free transmission

a dial star transmission leading to a dial star is through relay chains of the transmission and the dialing

Main line must be controlled at the location of the selector star for the sternes.

Individual control and test processes as well as the following are to be used with reference to FIGS. 3 to 7 of the plot the speech frequencies in each case according to the front and the mode of operation of an arrangement according to the be prepared. 25 invention will be described in detail.

In Fig. 1 is a schematic representation of one of the leads a subscriber, ζ. B. to the branch line ZL9

reproduced like plant; while shown in Fig. 2 (Fig. 3) connected subscriber, by lifting his

If, as shown in FIGS. 3 to 7, for a better overview, the handset is an outgoing connection, then

are placed, these show a detailed display in the selector star switch the call relay R2 is energized:

1. Earth (Fig. 3), Ik9b, 2k9a, 69, ..., «9, 3k9a, 4 £ 9δ, 5, R 2,

6, 7k0a, Saa (Fig. 4), 9Ma, lOgq (Fig. 5), llgla, 12äla, 13ila, Ud2a, 15, 16 19

36, 37k0b, ... (α-wire of the main line HLb to Fig. 5) ..., 46 ' ° " ^e ' 20 ''

When the relay responds !? 2 is achieved by closing the main lines HL α and HLb, of which only the core

Contact 21 r 2 (Fig. 3) earth potential on the δ-wires of the 26 δα of the main line ilia is shown, switched on:

2. Earth (Fig. 3), 21r2,

22, MkOa, 26ba, (Fig. 4), 27δα (Fig. 5), 28gla, 29 £ 20a, I £ la

23, 25 * 06, ... (δ-wire of the main line HLb to Fig. 5) ... ''

The relays El α (FIG. 5) and EIb of the subscriber calling over the selector star correspond to bank contacts foe / 9 transmissions Ueα and Ueb, of which only the former of the 45 is set. For the assignment of the transmission Uea selector star transmission Ue α is shown, the inbound traffic initiating relay E 2 α is excited and respond, provided that both only one circuit is closed when the transmission Ue b transmissions are free. At the contacts 17ela and occupied and accordingly the contact 33 ^ 2δ, via 18el6, negative potential is switched off from the α-wires of the relay to initiate the assignment of the main lines HLa, HLb . The relay R2 50 carrying Ueb was energized, opened and the contact (Fig. 3) drops and interrupts at its contact 21r2 34 /> 2δ is closed, which is assumed to be the circuit 2. in the following. The relay is 2α addresses via:

For the Ela relay, the holding winding II

(Fig. 7) a holding circuit effective: ⁴ · ^earth ( ^{in the LW} · ^Fl S- ⁷ )> · ■ ■> ^lwc - ^lw9c - ³⁰ »31έ29α,

^{v δ} _'55 32 * 29δ, 2Af2b, 35j> 2a LE2a, -.

3. Earth (Fig. 6), SQeIa, 51 (Fig. 7), 52 / "1", 53, 54ela,

HEIa, -. The relay E2 α closes after it has responded

inter alia its contact 38 e2 α (Fig. 6) and

By opening the contact 49el α (Fig. 6) the switches on a relay Ώ2α (Fig. 7):

Closure of a corresponding circuit for the 60 _{g earth (R 6) 38g2 fil {ρ} . _{?) 3Qel} ^ _ρ2α>

Relay .Elδ of the transmission Ueb prevented. The over- lD2aIID2a 41

transmission Ue α is therefore the transmission in outgoing traffic ''

upstream transmission Ueb on the order of assignment The relay £> 2 separates at its contact 14if2α

orderly. (Fig. 5) negative potential from the α-wire of the main

In the incoming traffic, on the other hand, the transfer line HL α is ab. An outgoing assignment of the transmission Ueb precedes the transmission Uea . Desires wear Uea is thus prevented,
a calling party z. B. to speak to the subscriber connected to the branch line ZL9 at the same time as the relay D2a (Fig. 3) is switched on, then (Fig. 7) when the transmission Uea is occupied, the line selector LW (Fig. 7) is Simultaneously with the closure of the holding current subscriber, the series of current impulses sent to the circuit for the relay EIa with outgoing occupancy of the

1 UÖ4 / / D

Transmission Ueα , the relays K 20α and .F20a (Fig. 6) are switched on:

6. Earth (Fig. 6), 38e2a or 5OeIa, 51 (Fig. 7), 52 ^ la, 55 (Fig. 6), 57, 58 «1«, I .F20 «, I K2Qa, 59MOa, - .

10. Earth (Fig. 5), 63δ1α, 62 £ 40a, 64,
72 η la, MIa, 73, -.

a, 69Ha,

The relay MIa responds and closes its contact 74? «La. After the contact 69ila is opened, the short-circuit in the winding of the relay NIa is canceled so that the latter can respond:

11. Earth (Fig. 5), 63bla, 62k40a, 74ml «, NIa, MIa, 73, -.

By opening the contact 72 'la a renewed short-circuit of the relay Nl α in response of the relay jià and closing of the contact GQiIa is prevented, however, the relay / 1 is α via the contacts 75 when re-response "1" and 76 Ha, a circuit for a relay UIa closed:

12. Earth (Fig. 5), 63δ1α, 62k40a, 75nla, 76ila, ¹ HuIa, UIa, 78, -.

The relay Ula responds and is placed in a self-holding circuit running through its contact 79ula:

13. Earth (Fig. 5), 6361 «, 62MOa, 75nla, 79ula, UIa, 78, -.

When the relay JIa drops again, a short circuit in the winding of the relay VIa that exists via the latter and the contacts 79ula and 8OwIa is canceled by opening the contact 76t 1 ". The relay VIa addresses:

The relay K20a responds and, by closing its contacts 60 & 20a (Fig. 7), is placed in a holding circuit running through its winding II:

7. Earth (Fig. 6), 38e2a or 5OeIa, 51, 60Ä20 «, II K20a, KAOa, 261, -.

In the holding circuit, an auxiliary relay KAOa responds, which interrupts the circuit 6 by opening its contact 59 & 40a (Fig. 6) and short-circuits the winding I of the relay K20 α by closing its contact 61Ä40a.

The relay F20a switched on in circuit 6 is a polarized relay with two rest positions. As a result of the excitation in the circuit 6, it is switched from the rest position assumed in the rest state of the transmission Ue α to the other rest position.

When the relay iT40 α (Fig. 7) in circuit 7 responds, a circuit for a relay JIa is closed at contact 62Ä40a (Fig. 5):

8. Earth (Fig. 5), 63δ1α, 62 £ 40α, 64, 6SfIa, 66 * 2α,

well _

67, 68 ''

In this circuit, the capacitor 67 is first charged, so that the relay JIa is delayed to respond. When it responds, the relay JIa closes its contact 69 Π α and thus a circuit for a relay / 2 a.

9. Earth (Fig. 5), 63δ1α, 62 £ 40a, 64, 6SpIa, 69Ha, ³ S / 2a, 70

71 '~'

The relay / 2a is also delayed by a capacitor 71 to respond and interrupts the circuit 8 of the relay JIa at its contact 66 ^ 2a. The relays / la and / 2a work in an interrupter circuit and thus form a pulse generator that is delayed by capacitors 67 and 71: When the relay / 2 a is switched on for the first time, a relay is simultaneously excited via:

14. Earth (Fig. 5), 63δ1α, 62β40a, 75nla, 79ula _% UIa, 78
Fla, 81 '~ ·

The relay Fla opens its contact 8OwIa and closes its contact 82 ν la. The relay! 7Ia is short-circuited via the latter when the relay / la responds again, so that it drops out. After relay JIa drops again , the holding circuit for relay Fla, which runs via contacts 76 ^ 1 'and 77ula, is interrupted, so that it also returns to the rest position.

While the relays JIa and J2a form a pulse generator, the relays 2Vl α and MIa are used to suppress the first pulse given by the relay / la and the relays Z71a, Fla to divide the given pulses. Table 1 clearly shows how the relays work.

Table 1

pulse / Ια Addressed relay / 2α Μία 2VIa UIa Via i J JIa / 2α Μία 2VIa UIa Via 1 MIa NIa UIa Via JIa / 2α MIa NIa 2 ί JIa / 2 α MIa NIa ² 1 MIa NIa JIa. / 2α MIa NIa UIa Via 3 ί JIa / 2α MIa NIa UIa ³ 1 MIa NIa UIa JIa / 2α MIa NIa 4 ί JIa / 2α Μία ⁴ ι . . ETC. JIa. ■ ί

5ο The relay UIa advances a relay chain consisting of relays F20a to F25a at the contacts SBuIa, 82ula (Fig. 6). Relays F20a to F25a are, as already described for relay F20a , polarized relays with two rest positions. By energizing their winding I, they are switched from the rest position they assumed in the initial position of the chain to the other rest position - and by energizing their winding II they are switched back to the original rest position.

The relay .F20a had actuated its contacts after excitation via its winding I in circuit 6. A circuit for relay F21a is prepared at contact 83f 20a, which becomes effective when relay U ^- la (Fig. 5) responds via contact 82 «la (Fig. 6):

15. Earth (Fig. 6), 50eIa or 38e2a, 51 (Fig. 7), ^
55 (Fig. 6), 57, 82mla, I F21a, 83f20a, 84f22a, K21a, -.

The relay F21a (Fig. 6) operates its contacts and prepares one by closing his contact 85 / '21 α

Circuit for relay F22a , which is closed after relay UIa (Fig. 5) has dropped at contact 58ula (Fig. 6):

16. Earth (Fig. 6), SOeU or 38e2a, 51 (Fig. 7), S2pla, 55 (Fig. 6), 57, 58ula, I F22a, 85f21a, 86f23a, K22a, -.

The relay F22a is switched to the other rest position, opens its contact 84f22 and closes its contact 81f22a. When the relay TJIa (Fig. 5) responds again, the relay ^ 23 «(Fig. 6) is switched on via the latter:

17. Earth (Fig. 6), 50eIe or 38e2a, 51 (Fig. 7), 52 ^ la, 55 (Fig. 6), 57, 82m1 «, I F23a, 87f 22a, 88f24a,

The further switching of the chain takes place accordingly. Each time the relay Ula (Fig. 5) picks up and drops out , a different winding of a chain relay is energized. After the windings I of all the chain relays have been temporarily switched on, the windings II of the chain relays are also temporarily switched on. Thus, all of the chain relays are switched from the rest position assumed in the initial position to the opposite rest position and then switched back in the same order. From the following table 2 it can be seen which chain relay is energized with the individual impulses and which rest position the polarized relays have assumed. The Roman numerals denoting the windings were used to identify the respective rest position. The rest position II or (II) assumed in the initial position of the chain corresponds to the effective or previous excitation via winding II, the other rest position I or (I) corresponds to the effective or previous excitation via winding I.

Table 2

45

in the
Pulse Aroused
Control relay Via F20a Assumed rest position
the chain relay F22a F23a F24 = a F25a JIa (H) F21a (H) (II) (Π) (H) 0 I. (H) (II) (H) (H) (H) (Bele
supply) (I) (H) (H) (II) (Π) (H) 1 JU UIa (I) (H) (II) (Π) (H) (H) 2 JU (I) I. I. (H) (Π) (H) 3 JIa UU (I) (I) (I) I. (Π) (H) 4th JIa (I) (I) (I) (I) I. (H) 5 JU UU (I) (I) (I) (I) (I) I. 6th JU II (I) (I) (I) (I) (I) 7th JU UU (H) (I) (I) (I) (I) (I) 8th JU (H) II II (I) (I) (I) 9 JU UU (Π) (H) (Π) II (I) (I) 10 JIa (H) (Π) (Π) (H) II (I) 11 JU UU (Π) (H) (Π) (Π) (Π) II 12th JU \ (II)

55

6ο

With the chain it is possible to pay off twelve pulses, of which the first is given when the relay EIa or E2a (Fig. 5 or Fig. 7) has been activated, which means that the first is suppressed by the relay / 1 α (Fig. 5) given impulse by the relays Mla and NIa makes necessary, since synchronously to the chain (Fig. 6) in the transmission a chain (Fig. 4) of the selector star via contacts of the relay JIa (Fig. 5) is controlled . A capacitor 92 , which is charged via contacts 9OiIa, 9IiIa when the relay JU is in the idle state, is used to influence the chain:

18. Earth (Fig. 5), 9IiIa, 92, 9OiIa, 93, -.

The occupancy of the capacitor 92, which is connected to ground potential in the idle state of the relay JIa, is connected to negative potential in the operating state of the relay JIa via the contact 95i la and the resistor 93. The occupancy of the capacitor 92, which is at negative potential in the idle state, on the other hand, is switched on in the working state of the relay JIa via the contact 94ila to the wire 27ba to the selector star. When the relay JIa is in the working state, earth is connected to the wire 10 α α to the selector star at the same time via the contact 97i la. When relay JIa responds for the first time, the following circuit is closed:

19. Earth (Fig. 5), 97ila, 12dla, llgla, 10aa (Fig. 4), I HIa, 98, 99h2a, 100s2a, S2a, lOlsla, IFOa, 102zla, 103yla, IKOa, 275 «(Fig. 5) , 28gla, 104MOa, lOSdla, 94ila, 92, 95ila, 96 & 31 «, 93, -.

During the charge reversal of the capacitor 92 (FIG. 5), the relays HIa, S2a, FOa and KOa (all FIG. 4) are excited in the circuit 19, of which the relays HIa, FOa and KOa are designed as polarized relays. The relay if la assumes the rest position, which corresponds to the excitation via its winding I, and actuates its contacts in the process. The contact 9AIa is opened and the contact 109Al is closed. The winding I of the relay Hla is thus short-circuited for further switching operations. The relay S2a responds, opens its contacts 100s2α, 110s2a and closes its contact Ills2a. At contact 100s2a the short-circuit of the winding of relay H2 α is canceled, so that the latter is also excited, contact 99h2a is bridged with contact 111 s2a and by opening contact 110s2a, further relays are switched on after energizing relay H2 α via its winding I and the resulting opening of contact 99h2a and closing of contact 112h2a prevented. The relay KO α is switched from its rest position assumed in the starting position of the selector star to the opposite rest position. It opens its contacts 7k0a (Fig. 3) and 24 & 0a. At contact 7k0a the relays Rl and R2 are separated from the wire 8αα and at the contact 24 £ 0a the contacts 113rl and 21f2 of the call relays Rl and R2 are separated from the wire 26δα until the selector star WSta is activated .

The chain relay FOa designed as a polarized relay (FIG. 4) of the chain of the selector star WSta consisting of the relays FOa to F5 α is switched in the circuit 19 from the rest position assumed in the starting point of the chain to the opposite rest position. At contact 114 / Όα it prepares a circuit for the chain relay Fla. When the relay JIa (FIG. 5) drops out, the circuit 19 is interrupted at the contacts 94ila, 95ila and 97ila and the circuit 18 is established again at the contacts 9OiIa, 9IiIa. The polarized relays HIa, H2a, FOa, KOa (FIG. 5) retain their assumed rune position. The switched off by the interruption of the circuit 19 relay S2a, however, drops out. When responding again

ίο

of the relay / 1 «(Fig. 5), a new circuit is closed via the main line HLa :

20. Earth (Fig. 5), 97il «, 12dla, ligla, 10« «(Fig. 4), VOQhIa, 98, I12h2a, 115sl«, 51 «, 110s2«, IFla, IUfOa, 116f2a, I YIa, IKIa , 27ba (Fig. 5), 28gla, 104 £ 40 ", 105dla, 9IiIa, 92, 95 * 1", 96 & 31 ", 93, -.

The relay 51 'responds, opens its contacts 101 si', 115s 1 'and closes its contact 117s 1'. At contact 115s 1 "the short circuit of winding II of relay H 2" is canceled, so that this is also excited, contact 112A2 "is bridged with contact 117s 1" and, by opening contact lOlsl ", further relays are switched on after the Relay H2a via its winding II and the resulting switching back of the last-mentioned relay into the rest position assumed in the initial position of the chain is prevented.

The relay Yl «switched in the circuit 20 from its rest position assumed in the initial position to the opposite rest position prevents the renewed excitation of the windings I of the relays FOa and KOa by opening its contact 130yl a.

The further switching of the chain of the selector star WSta takes place in a manner corresponding to the switching of the chain of the transmission Ue α , which can be seen in Table 3 below.

Tabel

pulse I. JIa Aroused
Control relay 52a Taken by control relays (Π) (HI FOa Fla Rest position from . FZa F3a Chain relay FSa she HIa j HZa (HI (I) Ai (H) (H) (H) (H) F4a (H) 0 JIa 52 « (Π) (i) / ii (II) / I I. (H) (II) (H) (Π) (H) 1 JIa I. (HI (I) Ai (I) I. (H) (H) (II) (H) 2 JIa 51 « 52 « (I) (I) Ai (HI (I) (I) I. (H) (II) (H) 3 JIa (I) (HI (I) Ai (I) (I) (I) I. (H) (H) 4th JIa 51 « 52 « (I) (I) (i) / ii (I) (I) (I) (I) (H) (H) 5 JIa (I) (I) (I) (I) (I) (I) I. I. 6th JIa 51 « 52 « (I) II (I) (I) (I) (I) (I) 7th /1" (I) (H) II (I) (I) (I) (I) 8th JU 51 « S2 « (I) (H) (H) II (I) (I) (I) 9 JIa (I) (Π) (H) (H) II (I) (I) 10 JIa 51 « 52 « (I) (H) (H) (Π) (H) (I) (I) 11 JIa (H) (Π) (H) (H) II II 12th 51 « (Π)

As with Table 2, the Roman numerals indicate which winding the polarized relays in the respective state are excited or were previously excited, depending on whether the Roman numerals are not in Brackets are or are in brackets. The Roman numerals are accordingly the ones currently available or the previously assumed rest positions of the relay.

Before going through a connection to a calling or called to the in detail Participants connected to the selector star switch should initially be received after the termination the counting of all twelve pulses to be counted running switching processes to prevent a further counting of pulses are explained.

According to Table 2, the twelfth pulse given by the relay JIa (FIG. 5) in the transmission Uea energizes the relay F25α (FIG. 6) via its winding II and with the latter in series the relay KZIa . The relay KZIa responds, closes its contacts 120Ä31 ", 121Ä31" (Fig. 5) and opens its contact 96Ä31 ". At contact 120 & 31 "the contact 76ila is bridged so that the clock circuit consisting of the relays UIa and F1" cannot be switched on. The relay UIa, which was switched on with the twelfth pulse, remains energized. A delayed relay Dl «is switched on via contact 121 k 31«:

21. Earth (Fig. 5), 121 £ 31 ", 122 * 1", Dl ", -.

70 At the same time, however, the contact 96 £ 31 "lifted the short-circuit of a relay XIa, so that diesse respond instantaneously and its contact 122x1" may open in the circuit 21 of the relay Dl ". The relay XIa speaks to:

22. Earth (Fig. 5), 97fl «, 12dla, WgIa, 10« «(Fig. 4), 109M«, 98, 112Ä2 «, 115sl«, 51 «, 110s2«, II .F5 «, 123 /" 4 «, 124fO«, II A '10α, ΙΑΊΙα, 27δα (Fig. 5), 28gl «, 104Ä40«, 1Ο5 «Ί«, 94tl «, 92, 9SiIa, XIa, 93, -.

In the selector star WSta , the relay F5a (FIG. 4) is switched back into the rest position assumed in the starting position by excitation via its winding II, as shown in Table 3. At the same time, a control relay KUa is switched from the rest position assumed in the initial position to the opposite rest position by excitation via its winding I. After the end of the twelfth pulse given by the relay / 1 "(FIG. 5), the relay XI" drops out again and closes at its contact 122λ; 1 «again the circuit 21 for the relay Dl«. The on delay of the relay Dl «is chosen so that it does not respond in the pulse pause between the twelfth and the thirteenth pulse. With the thirteenth pulse it can only take effect if relay XIa does not respond again. A repeated response of the relay XIa is only possible if the counting chain in the selector star WSta on the twelfth pulse given by the relay / 1 «is not in the one corresponding to this pulse

009 549/100

1 UÖ4 / / D

Position has been reached, that is, if there is a faulty switching, i.e. if the progression of the chains in the selector star and in the transmission did not take place synchronously. The renewed response of the relay Xiα in the circuit running over the main line HLa is prevented by the fact that the contact 103yl «(Fig of the relay FOa is open and no circuit can be effective via the windings I of the relays F2a, F3a or via the windings II of the relays FOa, F2a, FAa. During the thirteenth pulse is not effective again so under the assumption that the chain of the Wählsternes WSTA was already in the corresponding the twelfth pulse position reached, the relay XIa (Fig. 5), so that the relay D 1 α in the circuit 21 for Appeal comes. The relay DIa opens its contacts 12dla, 105dla and closes its contacts 125dla, 126dla, 127dla. With contact 125dla XIa the relay is short-circuited again and α respectively to the contacts lOSdla 127dl and reversed 12dlα or 12SdIa the running via the main line HLa Umladestromkreis for the capacitor 92 so that the following circuit will be effective:

23. Earth (Fig. 5), 97ila, 126dla, 27δ «(Fig. 4),

UYIa, 128Ä0 ", 129 ^ 1", 130Ä11 ", 131, 132, Il HIa, 10"", (Fig. 5), BIa, 127dia, 94ila, 92, 95ila, 125dla, 93, -.

In the selector star WSta the relay ZI "(Fig. 4) responds , opens its contact 129zla and closes its contact 133zl". By opening contact 129x1 ", the short circuit of winding II of relay KOa is canceled and contact 130 &11" is bridged with contact 133 ^ 1 ". The polarized relays £ T1 ", KOa, YIa are excited via their windings II and accordingly switched back to the rest position assumed in the starting position of the selector star. After the contact 128Ä0 «is opened, the relay KlIa is also excited via its winding II and switched back. All chain and control relays of the selector star are in their original position after the circuit 23 has been interrupted and the relay ZI «has been switched off as a result.

The interruption of the circuit 23 is brought about by a relay 51 "(Fig. 5) responding in the transmission Ue α , which at its contact 63bla the circuit for the relay / 1" and at the same time the circuits for the relays iVl ", Ml", UIa interrupts.

The following are intended to switch through a connection from a calling to the dialing star connected subscribers to the exchange leading switching process are described in detail.

It was assumed that the subscriber who is connected to the branch line ZL 9 (FIG. 3) had initiated an outgoing connection by picking up his handset. In the transmission Ue α there is earth via the contact 15 (Hl ", the windings I and II of the relay Pia and the contacts 104MOa, 28gl" during the pulse pauses of the pulses given by the relay / 1 "on the core 27 δ" of the main line HLa. On the other hand, at the same points in time, there is a negative potential across the resistor 151, the contact 152 η la, the resistor 15 and the contacts 14iZ2 ", 13il", 12αΊα, llgla on the core 10a "of the main line HLa.

During the progression of the chain of the selector star WSta , with the second to eleventh impulse with 7ο the chain relays .FO "to F5a (Fig. 4) are energized coupling relays if 1" to KlO , which are also designed as polarized relays and are connected to their contacts 155Al " , 156Ä1 "to 161 k 10", 162 k 10 "(Fig. 3) establish a connection between the main line HL α and the individual intermediate lines ZL .

Each coupling relay, once temporarily excited and thus switched to the rest position opposite to the rest position assumed in the initial position, is switched back to the rest position when winding I of the following coupling relay is excited via its winding II, which it assumed in the rest state of the selector star. So z. B. when the winding I of the coupling relay K9a (Fig. 4) is energized, the latter is switched from the rest position assumed in the rest state of the selector star to the opposite rest position, while the relay KSa is simultaneously switched back to the rest position assumed in the rest state due to the excitation via its winding II will. The mentioned windings are switched on in series with winding II of relay -F3 «and thus according to Table 3 at the tenth pulse. The relay K9a closes its contacts 159 k9a, 160 £ 9 "(Fig. 3) and thereby connects the branch line ZL 9 with the main line HLa. After the end of the tenth pulse, a circuit for the relay Pl (Fig. 5) of the transmission Ue a is closed:

24. Earth (Fig. 5), 150il «, II PI«, I Pia, 104Ä40 «, 28gl«, 27δα (Fig. 4), 26δ «(Fig. 3), 160 £ 9«, δ9, ... (Subscriber station of the subscriber connected to branch line ZL 9 ) ..., "9, 159A9", 165h2a, 8aa (Fig. 4), 132, II HIa, 10 "" (Fig. 5), llgl ", 12" Ί «, 13ila, 14d2a, 15, 152 # 1«, 151, -.

In this test circuit, the relay Hla (FIG. 3) is also excited in series with the relay P1 (FIG. 5). As already described, the latter is designed as a polarized relay and is switched back to the rest position assumed in the starting position of the selector star by excitation via its winding II. It opens its contact 109hlα and closes its contact 9M «.

As can be seen from the previous description, the relay Hl α always assumes the rest position corresponding to the excitation via its winding I when the relay FOa to F5 α (Fig. 3) existing counting chain of the selector star WSta is incremented . By opening its contact 9M ", the rectifier 132 is switched into the" -wire of the main line HL "so that the chain relays are prevented from being attenuated during their switching by the subscriber stations of subscribers connected to the branch lines and the subscribers' alarm clocks are prevented from being influenced by inrush currents . After checking for a calling or called subscriber, however, the α-wire of the main line HLa is switched through directly via the contact 9Ma by energizing the relay Hla via its winding II.

The relay P1 "(Fig. S) responding in the circuit 24 opens the circuit 8, 9 for the relays / 1" and / 2 " at its contact 65-p 1". The relays "1", ilil ", UIa and VIa, on the other hand, remain in their assumed position, since they are held independently of the contact 65 ^>1". By opening the contact 52pla (Fig. 7) the holding circuit 3 of the relay £ 1 «is interrupted, while that in series with the winding II of the relay _F23a (Fig. 6), which is connected to the branch line ZL 9 (Fig. 3 ) connected subscribers associated coupling

13 14

Relay K29a (Fig. 6) of the transmission Ue α in the following- The relay H3a (Fig. 7) responds and closes with

continues the circuit: its contact 179A3 «its winding I in the circuit

25. Earth (Fig. 5), 6361 «, 62 £ 40a, 167 (Fig. 6), 166, 56, f short. With contact 180A3 «it switches 82i 1 II F23a 168 f 22a 169 f'2Aa K29a ^s R ^e l ^aIS Gl <z to the bank contact asac of the

'''''' 5 arm asc of the caller AS streaked bank contact-the relay K29a (Fig. 6) had a series when it responded. Via contact 181 A3 "of the call finder AS is its contact 170A29 'to the annealed in the branch: line ZL 9 (Fig. 3) connected subscribers associated counter Z9 züge- to the main line HLα ²⁸ · ^{earth (Fi} g · ⁵ )> 63δ1α, 62 & 40α, 167 (Fig. 6), 166, 51 assigned bank contact asad of the switching arm asi of the io (Fig. 7), 173pla, 182gla, 181h3a, ..., - (in AS). Call seeker AS painted bank contact row switched on. When checking the call seeker , the Rearm asc (Fig. 7) also keep a circuit for the relay GIa gelais K20a and K 40 α via the test after dropout of the relay EIa:

26. Earth (Fig ^ S) 6361α 62Μ0 «167 (Fig. 6), 166, 51 ¹ ^ _{29 Earth (im} ^ _{s K 7)} _ _ _{18Qh3 183cl} (Fig. 7), 60 £ 20a, II K20a, K40a , 261, -. j _Q1 ^ _UG { _a> % £ ' _ /

By closing the contact 171 ^ 1 α (Fig. 5) was

an auxiliary test relay P2a has been switched on, which with the relay GIa interrupts with its contacts

his contact 172 ^> 2a (Fig. 7) a circuit for 20 11g la, 28gla (Fig. 5) the test circuit to the calling a relay H3a closes: participant and closes at his contact 185 gla

27. Earth (Fig. S), 63δ1α, 62 * 40β, 167 (Fig. 6), 166, 51 ^eüien holding circuit for the relay PIe:

(Fig. 7), 173pla, 174, I H3a, 175cla, II H3a, 30. Earth (Fig. 5), 150iIa, II Pie, IPIa, 140 £ 40a, 176A29 ", 30, 177 £ 29", 172 ^ 2 «, 178, -. 185gla. 186, -.

With contact 182gla (Fig. 7) the starting incentive is switched off. The relay H3a continues over:

31. Earth (Fig. 5), 63δ1 ", 62 £ 40", 167 (Fig. 6), 166, 51 (Fig. 7), 17301 ", 187gla, IH H3a

179A3 ", 175cla, II H3a, 176Ä29", 30, 177/5: 29 ", 17202", 178 "

The subscriber receives his feed and the dialing signal is interrupted. Since the relay K31 α (Fig. 6) from the call seeker AS (Fig. 7): is switched, the relay Dla (Fig. 5) and from

32. Earth (in AS, Fig. 7), ..., ash, asab, 188A3 «, 189δα ^{35 the latter switched off} , furthermore the relay BIa off again. (Fig. 6), 190δα (Fig. 5), 27δα (Fig. A), 26ba (Fig. 3), ^the incoming traffic, the Ver-160 £ 9α, δ9 wound, ... (TeünehmersteUe of the branch - Establishing a connection to a participant connected to the selector star switch line ZL9) ..., a9, connected participant as follows:

159Ä9 ", 165A2", 8 "" (Fig. 4), 9Ma, 10aa (Fig. 5), ^{It was} assumed that the line selector

191 αα (Fig. 6), 192αα (Fig. 7), 193A3a, asaa, asa, ⁴ ° ^{LW by a} calling party on the

/ J _1n ^ 40 calls connected to the branch line ZL 9 (Fig. 3)

Subscriber assigned bank contacts Iw9 (Fig. 7)

Upon arrival of a Zählstromstoßes of the set and in the current circuit of the relay 4 E2a energized Bank contact Asad turned-counter Z9 and had (FIG. 7). Switched on by the latter, speak with this in series the relay vZ2a actuated. The latter 45 relay D2a in circuit 5 and the relay K20a, F20a responds, connects its contact 194 ^ 2 α and thus (Fig. 6) in circuit 6. For the relay K20a , a circuit for the relay D2a: the holding circuit 7 is effective, via which the

33. Earth (Fig. 5), 63 & la, 62A40a, 167 (Fig. 6), 166, 51 g ^{elais 2} F ⁴⁰ * ^ f ** this will be the continuation of (Fig. 7), 194 * 2 «, 19502 «, 152«, IIW «, 41, -. f ^ette ^, f ¹ selection star and m of the transmission by ^ ^b ">r> 50 switching on the relay JIa (Fig. 5) at contact 62 & 40«

The relay D2a responds and bridged by initiates. After setting the chain in the tenth closing of its contact 196d2a the contact 19422a. Pulse position corresponding to Tables 2 and 3

The triggering of an outgoing connection established is the coupling relays K9a (FIG. 4), K29a (FIG. 6) after the circuit 29 is interrupted. This is excited. The relay K9a (Fig. 4) closes its contacts. Relay GIa (Fig. 7) drops out, switches on its contact 55 159 £ 9α and 160 & 9a (Fig. 3) and thus switches off the winding III of relay # 3 «, see above that this branch line to the main line by ZL9 HLa. This also drops, since its winding I through its own relay K29a (Fig. 6) closes, among other things, its contact 179 A3 α and its winding II through the contact 177 £ 29 α (Fig. 7) and thus a circuit contact 197d2a is short-circuited. for a relay CIa:

With contact IKgI «(Fig. 5) the 60 ^ _{earth (jm LW K 2) z} ^ _{9 3Q im29e}

Relay Pia switched off, which at its contact 171 φ 1 α 200 e2a ICIa IIC1 «

interrupts the circuit for relay P2a. To ' ' ' '

Relay P1 α drops out again at contact 56 ^ 1 α. The relay CIa responds and closes

Pulse relay JIa switched on, which switches the chains in its contact 20IcIa into one of the contact 200e2a selector star and in the transmission. 65 independent holding circuit:

As already described, after the return _{35 earth (in the LW K y)} _ j _{lwQ 3Q 177k29 of} the chains m speaks the starting position in the circuit 13 20IcIa II CIa -

the relay B la on, which at its contact 63 δ Ια the ''

Circuits for the relays JIa, / 2a, MIa, ATIa, i / la, With contact 183cla the relay GIa of the

Fla and the relays K20a, K 40 a, D2a (the latter in Fig. 7) 70 test wire to the caller .4S switched off and on

Contact 202c 1 «a local circuit for the said relay closed:
36. Earth (Fig. 7), 202cl «,

I Gl «, II GIa, 184
~ 203e2 «, II E2a, III EIa '~'

In this circuit, which is also used as a holding circuit for relay P2 ", the relay G1" responds and, by closing its contact 204g 1 ", switches an NTC thermistor 205 parallel to winding III of relay £ 2". After it has been heated up, this thermistor causes a strong weakening of the current in winding III of relay E2a, so that it drops out with a delay.

The relay Gl "closes with contact 185gl" (Fig. 5) the circuit 30 already described for the relay P1 ". The latter responds, interrupts the further switching of the chains at its contact 65pla , switches on relay P2 "by closing its contact 171 ^ 1", which switches off winding I of relay JE2 " at its contact Z5p2a (FIG. 7). With contact ao L «the relay HZa is switched on .:

37. Earth (Fig. 5), 63δ1 ", 62-40", 167 (Fig. 6), 166, 51 (Fig. 7), 173 ^ 1 ", III HZa, -.

The relay HZa responds and switches through the speech wires at its contacts 188 A3 β and 19ZhZa. For the first call to the subscriber connected to branch line ZL 9 , the following circuit exists:

38. Earth (in LW, Fig. 7), ..., Iwb, Iw9b, 206/5: 29 ", 188A3", 189δ "(Fig. 6), 190δ" (Fig. 5), 27 &"(Fig . 4), 26ba (Fig. 3), 160 & 9 ", δ9, ... (subscriber station of the subscriber connected to the branch line ZL 9) ..., a.9, 159A9", 165A2 ", 8""(Fig. 4), 132, II HIa, 10aa (Fig. 5), 191 "" (Fig. 6), 192 "" (Fig. 7), 193A3 ", 207e2", 208, WQ, -.

During one half- cycle of the ringing current emitted by the alternating current source WQ, the rectifier 132 (FIG. 4) is loaded in the reverse direction. The other half-wave of the alternating current, on the other hand, is added to the direct voltage of the office battery, so that the winding II of the relay Hl α is effectively excited and the latter is returned to its original rest position. The relay HIa closes its contact 9 Al "and thus bridges its winding II and the rectifier 132. As a result, a rectification of the Rufwechselstromes by the rectifier 132 and a directional charging of the W ^T ecker capacitor is avoided with the participant so that the alarm abuts normal.

After the relay £ 2 ″ (Fig. 7) drops, due to the thermistor 205, the first call is switched off and the ″ ″ wire to the line selector LW is switched through at contact 209e2. After lifting the handset at the called subscriber station, the latter is fed from the line selector LW via:

39. Earth (in LW, Fig. 7), ..., Iwb, Iw9b, 206Ä29 «, 188A3«, 189δ «(Fig. 6), 190δα (Fig. 5), 27δ« (Fig. 4), 26 &"(Fig. 3), 160Ä9", ö9, ... (subscriber station of the subscriber connected to branch line ZL9) ..., "9, 159Ä9", 165A2 ", 8""(Fig. 4), 132, II HIa, 10 "" (Fig. 5), 191 "" (Fig. 6), 192 "" (Fig. 7), 19ZhZa, 209e2 ", 210 &29", Iw9a, Iwa, ..., - (in LW) .

The switching processes that take place when an incoming connection is triggered correspond to those when an outgoing connection is triggered. They are initiated by interrupting the c-core in the LW line selector. The relay CIa which then drops out switches the relay Gl “off at its contact 202el“ and the latter effects the switching processes already described for returning the selector star and the transmission to the starting position.

Claims (6)

Patent claims: 1. Circuit arrangement for reversing two-wire telecommunication lines, the wires of which are used individually or in a loop to transmit control criteria, to check the line condition and to transmit the language and in which no separate operating power source is provided at the changeover point, characterized in that the in series with one to be controlled device (I .F0 "to II .F5") and a rectifier (98) between the two wires (10 "", 26δ "/ 27δ") of the telecommunication line (HLa) arranged a winding (IHIa) and in the one wire (8 "" / 10 "") of the telecommunication line (HLa) arranged series connection of another rectifier (132) with the other winding (II HIa) of a polarized relay with two rest positions, each alternating by means of a changeover contact (9Al ", 109Al" ) short-circuit this relay on the two wires (8 «« / 10 ««, 26δ «/ 27δ«) depending on the current direction (Fig. 4). 2. Circuit arrangement according to claim 1, characterized in that an alternating current source (WQ) is used to excite the one wire (8 "" / 10 "") arranged in the other winding (Illfl ") of the polarized relay, which is connected in series by means of a Direct current source (official battery) which cannot influence a winding (Iiil ”) of the polarized relay arranged between the two wires (10 ″ ″, 26 δ ″ / 27 δ α). 3. Circuit arrangement for reversing two-wire connecting lines between a selector star and a selector star transmission, in which the selector star switch to be controlled is arranged in series with the winding of the polarized relay lying between the two wires, according to claim 1 or 2, characterized in that the so in series lying rectifier (98) to prevent the selector star switch (IFOa to II.F5 «) from being influenced by the alternating speech currents when the supply circuit is closed in the reverse direction. 4. A circuit arrangement according to claim 3, characterized in that a pulse for reversing the connecting line (HLa) in the state enabling the switching of the selector star switch (IFOa) to II .F5 "simultaneously the selector star switch (IFOa to II.F5") by one step advances. 5. Circuit arrangement according to claim 4, characterized in that for generating Umsteuerbzw. Step-up pulses a charged capacitor (92) during the pulse in series with the DC power source (office battery) is switched. 6. The circuit arrangement according to claim 3, characterized in that a given after completion of the switching operation of the Wählsternschalters (IFOA to II F5a) via the connecting line (HLA) test pulse in said one wire (8 '' / 10 α α) of the connecting line (HLA ) Lying winding (IIAl «) of the polarized relay and thereby reverses the connection line in the state that enables telephony. In addition 3 sheets of drawings © 009 549/100 6.60