DE1007377B - Circuit arrangement for alternating current transmissions for two-way traffic in telephone systems - Google Patents

Description

GERMAN

The invention relates to alternating current transmissions for two-way traffic in which the Occupancy of an incoming transmission by one of the outgoing transmission on the other side emitted occupancy pulse takes place. With 5 simultaneous seizure from both sides of the line from the connection setup is completed in a certain preferred direction, during the connection the subordinate direction is canceled and the outgoing transmission associated with that direction transmits a busy signal backwards. In addition, such AC transmissions the assignment of an outgoing transmission is only possible if the incoming transmission is ready for operation at the other end of the line.

There are quite a number of arrangements for bidirectional AC power transmission known which prefer a certain direction to with simultaneous occupancy of the connection line at both ends of the preferred direction to enable the connection to be established. These arrangements use either multiple or a longer occupancy pulse in the preferred direction (see German patents 629 089 and 741 283) or different frequencies (see German patent specification 878 518) or different types of current such as induction or alternating current surges (see German Patent 740 991). These solutions require either timing or counting members or different ones Transmission frequencies and differently tuned receiving devices. These different The invention aims to avoid devices in the transmissions at both ends of the line.

There is already a solution that uses the same occupancy pulses in the preferred and in of the subordinate direction in the German patent specification '741 283.

The known arrangements are all still imperfect insofar as they are in addition to the preference one direction in the case of simultaneous occupancy at both ends of the line is no solution for the blocking an outgoing side of the bidirectional line in the event of failure of connection devices on the show the associated incoming line side (counter transmission). The German patent specification contains 856 630 an arrangement in which the blocking of an outgoing line side against an occupancy occurs when the incoming transmission is on the other side of the line or the one connected to it Voters are disturbed, whereby the operational readiness for the opposite direction is maintained. Again, however, this arrangement does not allow simultaneous occupancy at both line ends to that a connection, namely in the preferred circuit arrangement

for AC power transmission

for two-way traffic

in telephone systems

Applicant:
Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 4

Dipl.-Ing. Heinz Mertel, Munich,
has been named as the inventor

th direction. In addition, the known arrangement allows a simultaneous blocking both ends of the line are not closed. The invention, on the other hand, wants an alternating current transmission for create reciprocal traffic in which on the one hand with simultaneous occupancy the connection leads in one direction to the goal and on the other hand also a simultaneous blocking of the transmissions at both ends of the line is possible, with the line in the unlocked direction can be used. This is achieved according to the invention in that the incoming transmissions Switching means are assigned that when an incoming transmission is occupied by a sent by the incoming transmission of the other side, in relation to the occupancy pulse longer impulse, evaluate this as a blocking impulse, which they of the outgoing transmission of the same office and which blocks this outgoing transmission against occupancy by switching means.

The drawings show an embodiment of the invention. This is an arrangement for four-wire connecting cables.

1 shows an overview of the office 1 with the outgoing transmission 1 U eg, the incoming transmission 1 Uek and the carrier frequency device ITF;

Fig. 2 shows the outgoing transmission 1 U eg of office 1,

Fig. 3 the associated incoming transmission 2 Uek at the other end of the line in office 2,

"Fig. 4 shows the outgoing transmission 2 Ueg of Am1; it 2 and '

5 shows the associated incoming transmission 1 Uek at the other end of the line in office 1.

709 507/162

2 to 5, the voice lines and the switching contacts for the voice and signal lines, which are shown in Fig. 1 in the right half of the outgoing transmission 1 Ueg and the incoming transmission 1 Uek , are not shown. In addition, all switching means that are not necessary for understanding the invention have been omitted for the sake of clarity.

Fig. 1

This figure shows the outgoing and incoming transmission of the office 1 and the carrier frequency device 1 TF. From this figure it can be seen that the incoming transmission 1 Uek on reception, ie the and causes the transmission of a busy signal to the calling subscriber, whereupon the caller releases the connection.

Kg 2

This figure shows the outgoing transmission 1 Ueg

for the preferred direction. If this transfer is occupied, the upstream, not shown Group selector earth potential applied to the c wire, see above

ίο that relay IA can respond via its winding I:

1. +, {GW), c-vein, IwI, IgI, IwI, IeI, IAI, IWi 1, -.

Relay A remains independent via contact IaI

Signal and speech wires for signals and speech 15 from contact IjI of the blocking relay IS, so that alternating currents from the counter transmission in office 2 pulling the blocking relay 1> S "cannot take effect, 1 Uek is assigned to the incoming transmission, and the outgoing transmission 1 Ueg is switched to Senrden, ie the signal and speech cores for signals and speech alternating currents for the opposite transmission in office 2 are assigned to the outgoing transmission 1 Ueg . The outgoing transmission 1 Ueg must therefore be to receive the characters from the counter transmission Connect the receiving wires of office 2. The incoming transmission 1 Uek must connect the sending wires in order to send characters in the direction of office 2.

If the outgoing transmission 1 Ueg shown in this figure is occupied via the c-wire, then speaks

the occupancy relay 1C on and initiated via auxiliary 30 is. After the contact 1 ah 2 closes, Rerelais picks up the transmission of an occupancy pulse by lais IV >:

Closing the contact Iah via the outgoing _Λ , * »«. «.,» _R „r, * _rr

Signal wire 1 JfI to carrier frequency device 1 TF and

from here via the connection line VL to the response of the relay IA disconnects its incoming transmission to the other side. After a 35 clock Ia5, the locking wheels Ispl open so that the locking relay 16 ", not shown here, speaks for a certain time, can no longer attract. The contact

By closing the contact 1α4, the capacitor 1 Ko 5 discharges via relay 1 Ah, so that it picks up:

2. +, (IKoS), IWiS, Iß4, IAh, -.

The capacitor 1 Ko 5 was charged in the following circuit:

3. +, Iah7, Ia3, IWiS, IKoS, -.

The relay IAh sends by closing its contact Iah 9 an occupancy pulse via the signal wire 1 sg 1 to the carrier frequency device 1 TF ₁ which is transmitted from here via the connecting line VL to the incoming transmission 2 Uek of the opposite side

Changeover relay 1 Ua on and with its contacts Iüa2 and Iwa4 switches the speech wires for the ättr incoming speech alternating currents from the incoming transmission 1 Uek and to the outgoing transmission 1 Ueg. Likewise, the signal wire Isg2 for signals from the opposite direction is switched through via contact 1 «α6 from the carrier frequency device 1 TF to the outgoing transmission 1 Ueg .

However, if the incoming transmission 1 Uek occupied by the other side, then this switches the speech wires for outgoing traffic Hach tightening the Umschalterelais also not shown 1 Ub via the contacts 1 üb 2 and 1 üb 4 to. The same also applies to the signal wire for outgoing traffic Isg3, which is connected to the carrier frequency device 1 TF via contact Iub6. At the same time, when the incoming transmission is occupied, 1 Uek is transmitted via the blocking wire sp 1 in the manner shown later

the outgoing transfer 1 Ueg against occupancy passes over to 7

takt lad closes the response circuit for relay IC:

5. +, l £ 4, Ia6, ICIl ₁ 1ΑΪΪ, -.

Relay IC is held independently of circuit 5 via the c-veins:

6. +, (GW), c-Ader, ICI, Id2, IWiI, -.

After the capacitor 1 Ko 5 is discharged, relay IAh drops out and ends the occupancy pulse by opening its contact 1öä9 , relay I G responds via contact lahl:

7. +, IcS, lahl, IG, -.

Contact Ig-4 interrupts the holding circuit for relay IA, which was held via its winding II (see circuit 5), so that relay IA drops out. Contact Ig-2 holds relay IG independent of the current

With simultaneous occupancy of the two outgoing transmission directions at both ends of the line, one direction is given priority. The transmission of the occupancy pulses in both directions at the same time is possible because there is a signal wire for each direction. In the circuit arrangement shown in the figures, an outgoing connection from the outgoing transmission 1 Ueg of the office 1 is preferred, ie. the connection in the preferred direction is set up, while at the same time the connection in the opposite direction, hereinafter referred to as subordinate direction, does not lead to the destination. The outgoing transmission of the subordinate direction is blocked

8. + .1 * 3, IgZ, IG, -.

After drop of the relay IA is by opening the contact Ia2 interrupted the circuit for relay IV (see FIG. Strömläüf 4) that slopes towards the discharge of the capacitor Cor. 2 After relay IV drops out, contact 1 ^ 5 closes a circuit to excite changeover relay 1 Ua:

9. +, 1j2, 1u5, Ig6, IUa, -.

The switch relay 1 Ua switches with the contacts shown in Fig. I the speech wires for the incoming speech exchange currents and the signal line Isg2 for the incoming signals from the incoming transmission 1 Uek and the outgoing transmission

transmission 1 U eg to. Via contact 1 where 9 relay 1 Ua remains independent of contact IvS

10. +, Is2, Iua9, IGr 3, lg-6, IUa, -.

The switching of the signal wire 1 sg2 for incoming signals only takes place after the relay IV drops out , so that an occupancy pulse sent by the opposite side is routed into the incoming transmission 1 Uek and is not incorrectly evaluated as a return identifier in the outgoing transmission 1 Ueg. Transferring the number surges via the ώ vein and brings relay IA pulsed manner to the response that brings his hand over his contact 1α4 relay IAH to the response that ah pulses by closing its contact 1 9 transmits sgl to the signal wire. 1

After the end of the call, the release of the outgoing transmission 1 Ueg is initiated by disconnecting the c-wire. Relay 1 C drops out because its hold circuit (see circuit 6) is opened by cutting the c wire. Contact Ic5 is used to connect capacitor 1 to Ko 3, which was charged via

11. +, Ic6, lWi6, IKoZ, -

connected to relay IV so that it can attract due to the discharge current.

12. +, (IKoZ), IWiQ, IcS, Iua8, IV, -.

Closing contact Iw 4 discharges the capacitor 1 iCo 4 that was charged over

13. +, Iv2, Iah4, IWiT, IKo4, - via relay IAh

14. +, (IiCo4), lWi7, IvA, Ic7, IgZ, IAh, -.

Relay IAh picks up and uses its contact Iah6 to switch capacitor 1 iCo 5 (see current flow 2) parallel to capacitor IiCo 4, so that relay IAh remains attracted until the two capacitors 1 iCo 4 and IiCo5 are discharged. A long trigger pulse, which is longer than the occupancy pulse by the discharge time of the capacitor 1 iCo 5, is transmitted via the connection line to the incoming transmission 2 Uek via contact Iah 9. Contact IaA3 holds relay IV for the duration of the trigger pulse

15. +, IvZ, lahZ, Ic5, luaS, IV, -.

After the two capacitors 1 iCo 4 and 1 iCo 5 have been discharged, relay IAh drops out and, by opening its contact 1 ah, causes 3 relay IV to drop out.

After the relay 1 V drops out, the relay 1 G (see circuit 8) and relay are still in the outgoing transmission. 1 Ua (see circuit 10) tightened. After receiving and evaluating the trigger pulse in the incoming transmission 2 Uek on the other side, an acknowledgment pulse is transmitted from there to the outgoing transmission 1 Ueg. This pulse causes the relay IE located in the signal core lsg2 to respond via its winding I. Contact Ie3 interrupts the holding circuit for relay 1 G (see current circuit 8), which drops out after the capacitor 1 iCo 1 is discharged. The changeover relay 1 Ua is held for the duration of the acknowledgment pulse regardless of contact lg-6 via contact 1 ^ 6: changeover relay 1 Ua to drop out. After the relay 1 Ua has dropped out , the outgoing transmission 1 Ueg has returned to the idle state and can be used again.

Fig. 3

This figure shows the Uek 2 to that of Figure 2 shown outgoing transmission 1 Ueg associated incoming transmission line at the other end in ίο office 2. In the rest state, the relay is 2 R on the c-wire energized.:

17. +, 2R, Si, c-core, - (in GW).

If the fuse Si fails or if the downstream group selector fails, relay 2 R drops out and gives the incentive to send a blocking pulse to block the outgoing transmission 1 Ueg at the other end of the line against occupancy. The transmission of this blocking pulse and the blocking processes are described below.

If a seizure pulse recorded in the assigned audio frequency device arrives via the signal line 2 jg-4, relay 25 picks up and closes its contact 2 b 7, so that the seizure relay 2 D can pick up:

18. +, 2SI, 2SII (in 2Ueg), 2 ^ 1-wire, 2Z> 7, 2D ₁ 2Wi21, -.

In the outgoing transmission 2 Ueg at the same office, the blocking relay 2 S responds in this circuit and separates the input of the c-wire so that this transmission cannot be occupied. At the same time, the occupancy relay 2 D responds in the incoming transmission 2 Uek. Contact 2 d2 causes relay 2 X to respond:

19. +, 2d2, 2GrB, 2bl, 2X, 2WiIl ₁ -.

Via contact 2 d 8, relay 2 D remains independent of contact 2b 7

20. +, 2 ^ 3, 2511 (in 2Ueg), 2 ^ 1-wire, 2dS,

2D, 2Wi21, -.

At the end of the occupancy pulse, relay 2 B drops out and, by closing its contact 2b2, causes relay 2 X to drop out with a delay by short-circuiting its winding. At the same time, by opening contact 251, relay 2 K can respond via

21. +, 2d2, 2yl, 2KI, 2b2, 2/2, 2WiU, -.

Relay 2 iC holds itself over its winding II independently of current flow 21

22. +, 2d2, 2GrS, 2M, 2iCII, -.

By closing the contact 2 £ 4, the changeover relay 2 Ub picks up via its winding I:

23. +, 2d2, 2GrS, 2 * 3, 2Gr6, 2 £ 4, 2/4, 2UbI, 2k9,2Wi21, -.

Contact 2k 6 shorts relay 2 R : 24. +, 2R, Si, 2k6, 2dS, +,

16. +, 1.92, Iua9, \ e%, 1 Ua, -.

After the end of the acknowledgment pulse, relay 1 E drops out and, by opening its contact Ie6, causes the delayed drop out. After pulling the switch relay 2 Ub , the lines for outgoing speech alternating currents and the signal line 2 sg4 for return pulses from the same office outgoing transmission 2 Ueg are switched off and connected to the incoming transmission 2 Uek , as shown in Fig. 1 for office 1.

The now incoming number current surges are picked up by the current surge receiving relay 2 B and

with contact 2b6 transferred to the pulse correction device with the relays 2 Ha and 2Hb . Contact 2 hb 3 of the pulse correction relay 2 Hb transmits the corrected pulses via the d-wire to the following connection devices,

After the end of the call, the outgoing transmission 1 Ueg transmits the long trigger signal (see circuit diagram 14). Relay 25 picks up and causes relay 2X to respond by closing its contact 251 (see circuit 19). Relay 2 X short-circuits with its contact 2 χ 6 relay 2D and causes it to drop out. Relay 2 Z is held independently of contact 2 d 2 (see circuit 19) via its contact 2.χ 4.

25. +, 2λγ4, 251, 2X ₁ 2WiIl ₁ -.

After relay 2 D drops out , contact 2dB opens the short circuit for relay 2 R (current circuit 24), so that relay 2 R can pick up when the following group selector is ready for operation.

Relay 2 B drops out at the end of the trigger pulse and, with its contacts 2 & 5, closes a circuit for relay 2 F, which picks up via its winding I:

indicates that the same digits are used. If reference is made below to a circuit which belongs to the transmissions shown in FIGS. 4 and 5, but is not specifically listed, this is identified by a "(u)" in brackets. It should be noted that in circuits for the outgoing transmission 2 Ueg, the number "1" in front of the contacts or relays, eg "1.41", must be converted into the number "2", eg. B. "2AI". The same applies analogously to the circuits for the incoming transmission lUek; here the number "2" is to be converted into the number "1".

Fig. 4

The assignment of the outgoing transmission 2 Ueg takes place as described in FIG. 2 in the circuits 1 (u) to 4 (u). The occupancy relay 2 C is excited in the following circuit:

5u. +, 2s2, 2g-4, 2a6, 2CII,

26. +, 2cZ4, 255, 2FI, 2w58, 2k9, 2Wi21, -.

Relay 2F opens the circuit for relay 2 Ub with its contact 2/4 (see circuit 23). The Umschalterelais 2 Ub is kept by the discharge of the capacitor 2 Ko 6, which is turned over to the relay contact 2/5 Ub 2:

27. +, (2ΛΌ6), 2ß ^ "12, 2UbII, 2/5, 2UbI, -.

After the capacitor 2 Ko 6 has been discharged, the changeover relay 2 Ub drops out and, with its contact 2? I5 8, opens the holding circuit for relay 2F (see circuit 26), so that this also drops out. After relay 2 F drops out, relay 2 X also drops out with a delay due to short-circuiting of its winding. Relay 2 Z was held after the relay 25 dropped out via "After contact 2 c2 has been closed, the occupancy relay 2 C is held by its winding I and the as c wire (see circuit 6 (u)).

When relay 2Ah drops out , its contact 2 ah 1 closes a circuit for relay 2 G, which picks up:

7u. +, 2c3, 2ahl, 2s6, 2G, -.

Relay 2 G maintains its contact 2 g 2 regardless of contact 2ahl of relay 2Ah via:

8u. +, 2e3, 2g2, 2s6, 2G, -.

The further switching operations take place as already described for FIG. 2.

Here, too, it is triggered by cutting the c-core. Compared to the description of FIG. 2 there are no peculiarities.

28. +, 2 * 4,

, 2/3, 2 & 2, 2X, 2WiIl, Fig. 5

Contact 2x4 of the relay 2 X also opens the hold- When the occupancy pulse arrives in the other

circuit for relay 2 K, which pulls over its winding II in the coming transmission 1 Uek, the following circuit was held: 45 relay ID on

29. +, 2λ-4, 2 * 1, 2KIl ₁ - ,

so that the last relay relay 2 K drops out and the incoming transmission 2 Uek has returned to the idle state and can be occupied again.

Relay 2 F sent by means of its contact 2/1 in the attracted state the output pulse over the signal wire 2 sg 3 to the audio frequency device 2 TF, which forwards it for the outgoing transmission 1 Ueg at the other end of the line to indicate there that the incoming transmission has returned to the idle state and is ready for occupancy again.

Figures 4 and 5

These figures show the outgoing transmission Ueg and and the incoming transmission 1 Uek for the subordinate direction. The switching operations during assignment and triggering are the same as already described for FIGS. 2 and 3. In the following, therefore, only a few deviations in the circuits are pointed out. The circuits described below, which take the place of those listed in FIGS. 2 and 3, are differentiated from these by adding the letter "u". +, lg-4, Ia5, ISI, ISII (in IUeg), lspl-Κάζτ, Ib7, ID, lWi21, -.

Relay IX pulls after contact Id2 is closed (see circuit 19 (u). Relay ID remains independent of contact 1 bl via its own contact Id 8:

2Ou. +, lg-4, Ia5, Is3, ISII (in tUeg), lspi- vein, 1 ^ 8, 1 ^ 8, ID, lWi21, -.

The further switching processes up to full occupancy and when triggered are the same as for Fig. 3 already described.

If the two outgoing transmissions 1 Ueg and 2 Ueg are occupied at the same time, the assignment of the outgoing transmission 1 Ueg leads to the establishment of a connection, while the connection in the subordinate direction, starting from the outgoing transmission 2 Ueg , is not established and the calling subscriber Busy signal is transmitted.

The occupancy pulses sent by the two outgoing transmissions arrive in the two incoming transmissions and there excite the relay 1 B or 2 B. In the incoming transmission

Transmission 2 Uek of the preferred direction picks up Relay2D (see circuit 18), at the same time the blocking relay 2.9 responds in the outgoing transmission 2 U eg of the subordinate direction. By opening its contact 2sl , the current impulse receiving relay ZA is separated from the c? Wire, so that the subsequent current impulses are not passed on. By opening contact 2.? 6 the relay 2 G, which was picked up after the transmission of the occupancy pulse, is made to drop out (see circuit 7 u or 8u). Contact 2 si puts earth on the e-wire (contact 2c3 is also closed), and 'holds the blocking relay 2 S independent of the response circuit (see circuit 18) via winding III until the occupancy relay 2 C drops out, which is until the c-wire, triggered by hanging up the handset on the part of the calling subscriber, remains energized after circuit 6 (u). After the occupancy relay 2 C has dropped out , the outgoing transmission 2 Ueg can only be reassigned after the blocking relay 2 S has dropped out, since contact 2 si has interrupted the response circuit of relay 2A (see circuit 1 (u)).

After the relay 2 D has responded in the incoming transmission 2 Uek of the preferred direction, the switching processes proceed as already described.

In the incoming transmission 1 Uek of the subordinate direction, the relay 1 D cannot respond, since after the outgoing transmission 1 Ueg of the same office has been occupied, the contact IaS has interrupted the response circuit of the relay 1 D (see circuit 19 u). The occupancy pulse does not trigger any switching processes in the incoming transmission 1 Uek of the subordinate direction.

If the incoming transmission 2 Uek of the preferred direction is disturbed or if the group selector downstream of this transmission is disturbed, the incoming transmission 2 Uek causes the associated outgoing transmission 1 Ueg to be blocked at the other end of the line in order to block it against receipts. The transmission of the blocking pulse is initiated by the relay 2 R dropping out. Relay 2 R drops out if the fuse Si fails or the c wire to the following group selector is disconnected if it fails. If a fault occurs after a call has ended, so that relay 2 R does not pick up after the occupancy relay 2 D has dropped out, the blocking pulse is only transmitted after the acknowledgment pulse has been sent. After the relay 21 has dropped out? relays 2 X, 2 K and 2 Ub are still energized. After the relay 2 K, which is the last one of these relays to drop out, the transmission of the blocking pulse is initiated.

If a fault occurs during a connection between the outgoing transmission 2 Ueg at the same office and the incoming transmission 1 Uek , relay 2 R is held via blocking wire 2 sp 3:

30.-, 2WiS
2 R, +.

2ua7

After the changeover relay 2 Ua drops out, this holding circuit for relay 2 R is opened and relay 2R drops out. Contact 2rl then closes a circuit to excite the changeover relay 2 Ub.

31. +, 2rl, 2y2, 2k3, 2/4, 2UbI, 2k%, 2r5, 2 Wi 19, -.

The switch relay 2 Ub picks up and with its contact 2ub 6 switches the signal wire 2sg3 through to the carrier frequency device 2 TF . Contact 2 üb 9 brings about locking wire 2, the lockout 2S spl in the amt same outgoing transmission 2 Ueg for response over

32. +, 2Sl, 2SIl (in 217 ^), 2 ^ 1-core, 2d7, 2ub9, 2Wi20, 2k%, 2r5, 2WH9, -.

By responding to the blocking relay 2JT, an assignment of the outgoing transmission 2 Ueg during the transmission of the blocking pulse is avoided. Contact 2 j 1 separates, as already described for Fig. 4, the response circuit for relay 2 A (see. Circuit 1 (u)).

The relay 2F and 2 Y talk to via a further contact 2 üb 8 of the change-over relay 2Ub. Relay 2F is excited via its winding I as well as its winding II.

33. +, 2FII, 2 * 5, 2FII 2ub8, 2kS, 2rB, 2 Wi 19, -

and

34. +, 2di, 2bS, 2Fl, 2ub8, 2kS, 2r5,

2 Wi 19.00 .

Capacitor 2 Ko 6 is discharged by closing contact 2/5 via windings I and -II of changeover relay 2 Ub, so that this is held during the discharge time of capacitor 2 Ko 6. Contact 2y5 switches capacitor 2 Ko 7 parallel to capacitor 2 Ko 6, so that the release time of relay 2 Ub is extended by the discharge time of capacitor 2 Ko 7 . Contact ZfI sends the blocking pulse to the carrier frequency device 2TF via the signal wire 2 sg 3. After discharge of the Kondensatoren2 Ko 2Ko7 6 and the transfer relay drops 2 Ub and takes its part, by opening of the contact 2 üb 8 2F relay to drop out. Also, by opening the contact 2 üb 9, the lock core 2 spl separated so that the lockout 2S drops 2 Ueg in the amt same outgoing transmission. After opening the contact 2ub 8, the relay 2 Y remains in the following

Circuit:

35. +, 2ß2, 2dZ, 2GrS, 2Yl, 2y3, 2 & 3, 2/4, ZUbI, ZkS, 2rS, ZWH9, -.

The changeover relay 2 Ub does not pick up in this circuit. The pick-up of relay 2 Y is an indication that this incoming transmission is disturbed and has sent a blocking pulse.

When the fault has ended, relay 2 R picks up again and initiates the transmission of the unlocking pulse. Relay 2 R can only pick up, however, if the outgoing transmission 2 Ueg with the same office has not occupied the connection line. If this is the case, relays 2 C and 2 Ua , among other things , are picked up in the outgoing transmission 2 Ueg. Relay R 2 is short-circuited then the barrier wires 2sp4 and 2 sp 3 so that it can not tighten.

(in 2Ueg), 2 ^ 3-wire,

36. +, 2r3, 2j /> 4-wire

2 ^ 3 wire,

2R, +.

After the switchover relay 2 Ua and the occupancy relay 2 C have dropped out , relay 2 R can pick up and its contact 2r2 closes a circuit to excite the switchover relay 2 Ub.

37. +, 2r2, 2y3, 2k3, 2/4, 2UbI, 2kS, 2r6, 2

Via contact 2ub 9 the blocking relay 2S is again in the outgoing transmission 2 Ueg to the same office

709 507/162

Brought to respond (see. Circuit 32). Relay Y drops out after a delay because its winding I was short-circuited by closing contact 2r2 and winding II by contact 2r4. Relay 2 F runs through Connect the contact 2 üb 8th Relay 2 F sends an unlocking pulse via its contact 2fl via the signal wire 2 sg 3 to the connection line. The service life of the relay 2F is dependent on relay 2 Ub, the discharge to the Upon receiving the Entsperrimpulses speaks again relay IB ^ in the incoming transmission 1 Uek after tightening of the relay 2 F and brings relays IP and IX to respond. Since the unlocking pulse, like the locking pulse, is longer than an occupancy pulse, relay ID drops out during the unlocking pulse. Relay 1 X remains picked up until the end of the unlocking pulse and then drops out with a delay, as already described when the locking pulse was received. During the

1 Ueg transferred. As a result, relay 1 W is short-circuited and drops out with a delay.

42. +, Ife2, IdZ, Ib8, 1x2 (in lUek) \ sp2- wire, 1α7, lz> 6, \ e%, IW, Iw2, +.

After the relay 1 W drops out and its contact Iw2 opens, the relay IE remains on the blocking wire Isp2 and drops when it is opened

of the capacitor 2 Ko 6 is held. Capacitor io fall time of the relay IZ the unlocking pulse via 2 Ko 7 was switched off after the relay 2 Y dropped by opening the blocking wire Isp2 for the outgoing transmission of the contact 2y 5 from the discharge circuit via winding I and -II of the switch relay 2 Ub . After discharge of the capacitor 2 Ko 6 falls
Relay 2 Ub and, by opening its con-15
clock 2 ii & 8 relay 2 F to drop out. After waste
of relay 2 F , the incoming transmission is 2 Uek
returned to sleep.

The blocking pulse from the incoming transmission 2 Uek is from the connection line to 20 of the contact Ix2 . After the relay IE has dropped out, the transmission of the unlocking pulse is ended and the incoming transmission 1 Uek on the other side

the outgoing transmission 1 Ueg can be occupied. If there is a fault in the incoming transmission 1 Uek of the subordinate direction or in

Relay ID to respond (see circuit 18u). At the same time, the blocking relay 1 S in the exchange dialer also picks up the group that is subordinate to this transmission, so here, too, an is transmitted

Blocking pulse to block the outgoing transmission 2 feg · against receipt. The switching operations take place in the same order as for the IX by closing contact 1 ei2 (cf. 30 blocking of outgoing transmission 1 Ueg in circuit 19 (u)). Relay IX closes with its preferential direction as already described.

In the following, therefore, only the changes that are compared to the description for the preferred Direction occur, be mentioned. With regard to the

is. At the end of the inhibit pulse relay releases 1 B, 35 designate the current runs the same applies here as opens its contact 161 (relay IX after öff- in the description for Fig. 4 and 5 with planes of contact Id 2 current flow 25 (u) laid and said release.

hold) and closes with its contact 1 & 2 relay. away,

IX briefly, which falls off with a delay. During the dropout, if the connection line is not in the opposite direction of the relay 1 X , a blocking pulse is used in the direction of 40. In this case, relay 1 R blocking wire Isp2 is held for outgoing transmission 1 Ueg via blocking wire Isp 3.

transfer. The following switching processes take place here: Relay 1 B picks up for the duration of the blocking pulse and brings 157 via its contact

same outgoing transmission 1 Ueg as with a normal occupancy of the incoming transmission 1 Uek . After the relay 1 D has picked up, the relay pulls

clock 1 jr 6 relay 1D short, so that it drops out with a delay. With normal occupancy, relay 1j0- does not drop out, because the occupancy pulse is shorter than the blocking pulse

transfer.

38. +, life 2, 1 ^ 3, 168 (in lUek), li /> 2-vein, la.7, IvQ ₁ IGr 4, IW, lWi9, -.

Relay IW responds in this circuit and holds itself independently of this via its own holding circuit.

30u. -, IWi5,

Ic4

(in IUeg), Isp3 wire,

39.

Iw2, IW, lWi9,

After the relay 1 X drops out , circuit 38 is opened so that relay 1 E can pick up via its winding II.

40. +, Iw2,

1 WiIO, -.

During the release time of relay 1 X in the incoming transmission 1 Uek , relay 1 E could not respond because it was short-circuited via the blocking wire lsp 2.

41. +, Ife2, Id3, Ib8, 1λγ2 (in lUek), Isp2- Ader, Ia7, Iz / 6, 1 * 7, 1.EII, Izw2, +.

After the relay 1 X has dropped out, the switching means have returned to the idle state in the incoming transmission 1 Uek. In the outgoing transmission 1 Ueg , on the other hand, the relays 1 W and 1 E are attracted and, by opening their contacts IwI and IeI, have opened the response circuit for relay IA (cf. current flow 1), so that the outgoing over- Iua7 IR, +.

After the connection line becomes free, 1 Uek relay 1 Ub picks up in the incoming transmission (see circuit 31 (u)). At the same time, as already described, the blocking relay IvS "is made to respond in the outgoing transmission 1 Ueg at the same office. After the switch relay 1 Ub has been picked up , the relays IP and IF. Relay IP transmits the blocking pulse via the Connection line to the opposite side.

The release time of the relay 1 Ub is limited in the incoming transmission 1 Uek by the discharge time of the capacitor IKo 6. The capacitor IKo 7 is missing here, as it is only used in the incoming transmission 2 Uek of the preferred direction

Extension of the blocking pulse is required. After relays 1 Ub and 1P drop out, relay 1 F remains in the following circuit:

35u. +, IFI, 1 ^ 3, IkS ₁ If *, IUbI, IkS, IrS, 1WH9, -.

Tragung 1 Ueg can not be occupied. The switch relay 1 Ub does not pick up in this circuit.

After the malfunction has ended, relay 1 R picks up, provided the connection line is not in the opposite direction.

direction is occupied. In this case relay 1 would R

short-circuited via the ratchet wires 1 sp 3 and ispA so that it cannot attract.

36 and +, Ir 3, lsp 4-wire,

JU4

After the two relays 1 C and 1 Ua have dropped out , the circuit 36 u is opened, and relay Ii? can address via the c-core. By closing its contact Ir2, changeover relay IUb (see current flow 37 (u)) is made to respond and the release of the unlocking pulse is initiated. Nothing changes compared to the switching processes in the incoming transmission 2 Uek.

The switching processes when the blocking and unblocking pulse arrives in the incoming transmission 2 Uek on the other side and the blocking of the outgoing transmission 2 Ueg are the same as when the blocking and unblocking pulse is received in the incoming transmission 1 Uek and the outgoing transmission 1 Ueg have been described.

If a disturbance occurs simultaneously in both incoming transmissions 1 Ueh and 2 Uek , the transmission of the blocking pulse is possible at the same time because the switching means for receiving and transmitting the blocking pulse are independent of each other, so that there is no mutual interference when receiving and simultaneously Transmission of a blocking pulse occurs.

If the outgoing transmission 1 Ueg is seized in the preferred direction, while at the same time a blocking pulse is sent from the assigned incoming transmission 2 Uek at the other end of the line, the incoming transmission 2 Uek is still seized. The blocking pulse arrives in the incoming transmission 1 Uek , but cannot make the blocking relay 16 "respond in the outgoing transmission 1 Ueg at the same office because the circuit for this relay was interrupted when the relay IA responded via its contact la5 However, since the blocking pulse from the incoming transmission 2 Uek was extended by parallel connection of the capacitor 2 Ko 7 (Fig. 3), a part of this pulse is also received by the outgoing transmission 1 Ueg after the switch relay 1 Ua has responded and because of its length as The subscriber then receives a busy signal and is thereby prompted to release the connection by hanging up his handset. This disconnects the c-wire for the outgoing transmission 1 Ueg , so that the normal triggering process is initiated. The assigned transmission 2 Uek also sends in this Trap an acknowledgment impulse and after a a certain time, which is determined by the drop-out delay of the relay 2 X , a new blocking pulse, whereby the outgoing transmission 1 Ueg is blocked against reassignment.

If an occupancy pulse and a blocking pulse run against each other in the subordinate direction, the assignment is not completed, but is interrupted by the response of the blocking relay 2S in the outgoing transmission 2 Ueg, similar to what happens when both line ends are occupied at the same time. The blocking of the outgoing transmission 2 Ueg is carried out with an occupancy pulse when they run against each other, so that a triggering of this transmission does not cause another triggering pulse for the incoming transmission 1 Uek and, after an acknowledgment pulse has been transmitted from there, another blocking pulse is necessary for blocking is how this is necessary with simultaneous occupancy and blocking in the preferred direction.

The invention does not apply to the arrangement for four-wire connecting lines shown in the embodiment limited, but can also be used on two-wire connecting cables.

Claims (9)

Patent claims: 1.Circuit arrangement for alternating current transmissions for two-way traffic in telephone systems, in which the occupancy of an incoming transmission is carried out by a seizure pulse sent from the opposite side and, in the case of simultaneous occupancy at both ends of the line, the connection is only set up in a certain direction, the preferred one, leads to the destination and one outgoing transmission can only be occupied when the incoming transmission is ready for operation at the other end of the line, characterized in that the incoming transmissions are assigned switching means (B, D, X) which, when an incoming transmission is occupied by one sent by the incoming transmission of the opposite side, in Relation to the occupancy pulse longer pulse, evaluate this as a blocking pulse which you transmit to the outgoing transmission of the same office (sp2-Aaer) and which blocks this outgoing transmission against occupancy by switching means (wl, el). 2. Circuit arrangement according to claim 1, characterized in that the switching means for reception (B, D, X) and transmission (Ub, F, Y) of the blocking and an unblocking pulse are arranged in the incoming transmissions (1 Uek, 2 Uek) . 3. Circuit arrangement according to claims 1 and 2, characterized in that for the simultaneous emission of the blocking pulse in both directions, the circuits for sending (Ub, F, Y) and receiving (B, D, X) of the blocking pulse are independent of one another. 4. Circuit arrangement according to claim 1, characterized in that with simultaneous transmission of an occupancy and blocking pulse from both line ends in the preferred direction, the incoming transmission (2 Uek) is occupied by the occupancy pulse, but the blocking pulse in the outgoing counter transmission (1 Ueg) is evaluated as a busy response and causes the transmission of a busy signal to the calling subscriber, whereupon after the outgoing (1 Ueg) and incoming (2 Uek) transmission, the blocking pulse is sent again by the incoming transmission. 5. Circuit arrangement according to claim 1, characterized in that with simultaneous transmission of an occupancy and blocking pulse from both line ends in the subordinate direction of the blocking pulse in the incoming transmission (2 Uek) is recorded and evaluated to block the outgoing transmission (2 Ueg) of the same office . 6. Circuit arrangement according to claim 1, characterized in that when one occurs Fault during the triggering process until the blocking pulse is saved after an acknowledgment pulse has been sent (/ 8, R). 7. Circuit arrangement according to claim 1, characterized in that a locking and unlocking pulse is stored (R, sp3, spi) until after the end of the triggering (acknowledgment pulse). 8. Circuit arrangement according to claims 3 and 4, characterized in that an incoming transmission (Uek) for sending a Blocking or Entsperrimpulses the sending line (SGL), which is associated in the rest state of the official same outgoing transmission (LEL), switches on (IIb 2, UB 4, üb 6). 9. Circuit arrangement according to Claims 3 and 4, characterized in that the receiving wires are assigned to the incoming transmission (Uek) and the outgoing transmission (Ueg) at the same office can switch on these receiving wires (ua2, ual ·, ua6). In addition 4 sheets of drawings © 70950T / 162 i.57