DE572247C - Circuit arrangement for telephone systems with dialer operation - Google Patents

Description

The invention relates to a circuit arrangement for the production of different values Connections in telephone systems with dialer operation and especially such arrangements 5 connections in which the desired connection cable is used when establishing a high-quality connection even then immediately preparatory is blocked when the completion of the high-quality Connection takes some time. The invention now consists in the fact that when the connection point calls' a preparatory blocked connection line already for other purposes in the occupied Selector existing switching devices to output a signal to the prepared Initiate connection monitoring officer.

After receiving a such signal with the subscriber on the busy connection line in connection sit down and inform him that his leadership prepares for a high quality Connection 'is blocked and therefore he will not be able to establish the connection until further notice can.

In long-distance traffic, especially in so-called long-distance express traffic and in use of self-connection operation, a main requirement is the fastest possible processing the connection to ensure efficient use of the expensive long-distance lines.

For this, the arrangement according to the invention offers advantages in that the officer first preparing the connection line required for the incoming long-distance connection blocks, for which she only needs to dial the number of the subscriber concerned; the block is then completely automatically.

The remote connection is guaranteed up to this point and the officer can then devote himself to other work. You need in the existing connection not to enter, but notifies the participant only in the event that he should try another connection before completing the remote connection.

The subscriber has the advantage that he is through the blocking, which is in each Case occurs with the arrangement according to the invention, not disturbed in his conversation while he, if he really tries to establish another connection, only operated the dial.

The invention is illustrated in an exemplary embodiment in the accompanying drawing and shows

Fig. Ι the facilities required to explain the invention at the remote place,

Fig. 2 the line selector OFLW., Via which the remote officer establishes the connection to the desired subscriber.

*) The patent seeker stated as the inventor:

Franz Etsel in Berlin-Siemensstadt,

The establishment of a remote connection via the line selector OFLW shown in the drawing will now be described in more detail. The remote officer establishes a connection to the line selector OFLW in a known manner by actuating her impulse transmitter impulse contact nu . When the selector OFLW is assigned via the upstream group selector I. GW and preselector LVW (Fig. I), relay C is activated; Battery, control switch position ι, relay C, winding I, c-line to the group selector /. GW, test arm of the group selector and via a test relay P ¹ to earth. Relay C is placed in a holding circuit via its contact c ¹ with its two windings I and II. If the remote operator sends out the series of current impulses required for setting the line selector OFLW to the desired subscriber line, the relay ^! excited via: battery, relay A, windings I and II, control switch position ι, α-line to earth via a contact of a surge relay (not shown) in the upstream group selector. During each series of impulses, the & -line is also connected to the battery in this group selector, so that relay « B responds via switching arm IV of the control switch in position ι and via its windings I and II. Each time relay A responds, the solenoid H of the line selector OFLW is excited via: battery, winding of H, control ^{switch position V 1} , contact α ² , earth. H lifts the switch arms of the line selector into the corresponding Dekaide. After the end of the first series of impulses, the relay B drops out, so that the rotary magnet S of the control switch is activated via the head contact k ³ and contact & ^4, which were closed during the first stroke step, and its arms switch to position 2.

In the next series of current impulses, relay A responds to each current impulse, as previously described, and in control switch position 2 via switching arm V and contact α ² , the rotary magnet D of the line selector OFLW is actuated. He turns his arms until they are switched through to the contact of the selected line.

When B is de-energized after the end of the series of impulses, magnet vS ^{1 is} excited via shaft contact w ^s and contact & ⁴ , which brings the control switch to position 3. In this position, a circuit for the rotary magnet S of the control switch is closed via: battery, winding of 5 ", control switch position 3, breaker Un, earth. The control switch goes to position 4, in which the magnet is excited via contact a ^u and the control switch to position 5. It should also be mentioned that the battery is temporarily applied to the α-line by the impulse transmitter at the position of the remote official after sending out all series of impulses, so that when a remote connection is established, the relay / in position 3 of the control switch via its winding I. By closing its contact i ^a , it places its winding II in a holding circuit: battery, winding II of J ₁ contact i ⁶ , switching arm I of the control switch in position 3 and 4 or winding of T, contacts ⁷ , earth Relay T is short-circuited in control switch positions 3 and 4. In position 4, the selected connection line is checked.

It is assumed that the requested subscriber is making a local call which he himself has made. The test line c ¹ is therefore without voltage, and relay P does not respond in position 4 of the control switch. When the control switch is switched to position 5, the short circuit for relay T is canceled and it responds. Relay T causes through its contacts i ⁸ and i ⁹ the connection to the selected line and its contact t ⁿ excites relay X, winding I. Contact t ¹⁰ is closed in preparation. The control switch magnet 6 ″ is energized via the likewise closed contact i ¹² , p ¹³ , and the control switch moves to position 6.

The control switch remains in this position for the time being. By applying earth to contact t ¹⁰ , position 6, the selected subscriber line is blocked against outgoing and incoming calls; the subscriber is preset remotely. Relay X is now - after interruption of the circuit for its winding I in control switch position 5 - with its two windings II and III · in position 6 of the control switch via the loop closed at the subscriber station as long as the local call exists. . no

When the participant hangs up his phone when the call ends, X comes to. Drop, and the control switch is switched to position 7 ^{via contacts 15.} If the subscriber wants to reestablish a connection before the officer connects the long-distance ^call , the relay X comes back when he lifts his receiver; in order to respond, his contact closes x i0, whereby the interrupter Uv? is applied to the α wire, - in a circuit via battery, breaker Un ² , contact λ ⁴⁰ , control

switch position 7, α-wire, relay E, winding I, contacts i ²⁰ , α ¹⁹ to earth. This causes, corresponding to the current surges emitted by the interrupter Un ^ , intermittent short-circuiting of the monitoring relay SR located on the α-wire in the officer's cord circuit. Relay SR opens and accordingly often closes its contact sr ⁴² , which results in the flickering of the signal lamp SL at the position of the remote official. The signal lamp SL is continuously switched on during the connection, with the exception of the time of the conversation, in a circuit via: battery, contact sr ⁱ² , lamp SL, earth.

The officer recognizes from the flickering signal that the remote pre-occupied subscriber wants a new connection. By pressing her button VT she attaches a battery to the & -wires. ^ao As a result, relay B is energized via its windings I and II via switching arm IV of the control switch in position 7. This closes a circuit for the magnet S of the control switch via contact & ¹⁶ , so that it moves to position 8. In this position, the remote official is connected through the two capacitors 17 and 18 to the desired subscriber. It notifies him that he is blocked for a long-distance connection and that no other calls can be made until these have been dealt with, whereupon the subscriber hangs up his receiver and the relay X drops out again. The control switch remains in position 8. The arrangement can also be made so that the officer is already switched through to the subscriber in control switch position 7 via the two capacitors 17 and 18. She can then communicate with him immediately when the flickering symbol appears without pressing her VT key or only moving the control switch to position 8.

The activation of the official sign can also be done in other ways. If, when the subscriber who has previously been blocked, picks up the receiver to establish a new connection, before the remote operator connects the long-distance call, the X relay responds again, it switches (Fig. 3) the earth connection for relay E, winding I at its contact λ ⁴³ from and over contact. * ⁴⁴ and the interrupter Un ^{2 on} again, so that the circuit for the monitoring relay SR is alternately interrupted and closed and the signal lamp SL flickers at the remote place.

Does the officer want the participant for that

If you call a prepared long-distance call, it checks the subscriber line by connecting the battery to the 5-wire by pressing the VT button. As a result, relay B. is energized via its windings I and II via switching arm IV of the control switch in position 7. This closes a circuit for the magnet 5 "of the control switch via contact b ^ie , so that it reaches position 8. The officer now receives a busy signal, which is transmitted in position 8 of the control switch via winding II of relay E to winding I and runs in the following way: earth, contact α ¹⁹ , i ²⁰ , winding I of E, α wire, intercom of the officer, & wire, choke coil Dr, control switch position 8, capacitor 31, battery, earth.

In position 8, the remote officer is switched through the two capacitors 17 and 18 to the desired subscriber. Assuming that the same person is still on the local call, she notifies him of the long-distance call and releases the connection by pressing her disconnect and call button PT, which puts the battery on the line α and thus the relay E is energized via winding I. As a result, the magnet 5 ″ responds via contacts e ²¹ , t ¹² , p ^ls ' and switches the control switch to position 9. In this position, earth is connected to the speech wires α ¹ - and b ¹ of ^{via the contacts i 8} and i ⁹ In addition, when the control switch is in position 9 of the control switch, the short circuit for relay P is ^{temporarily opened at contact i 10} , and after the local connection has been released, relay P responds to: earth, position 9 des Control switch, winding I from P, resistance winding Pw, test arm from OFLW, line c ¹ to battery via the winding of the isolating relay assigned to the desired line (not shown). Relay P closes its contacts and puts its winding II into a holding circuit: Battery, winding P II, contacts / ⁴ , c ⁷ , earth. Via contact p ^2S , control switch position 9, magnet S reacts again and switches the control switch age after position 10. In this position, the subscriber is called, if he has meanwhile replaced his receiver no, by using: earth, battery, call machine RM, relay U, control ^{switch position III 10} , upper switching arm of the OPLW,. Line α ¹ , alarm clock of the subscriber station, wire b ¹ , switching arm of OPLW, control ^{switch position IV 10} , earth ringing current is sent out. The subscriber reports, whereby relay U in the ringing circuit responds and magnet vS "is switched on via: earth, contact 25 ^, control switch position 10 and switches the iao control switch to position 11 (speech position).

If the officer is switched through to the participant in control switch position 8 and the participant is free, the control switch goes to position 9.Current flow for magnet 5 in control switch position 8 via the contact p ^as closed when relay P responds. The further operations are carried out as described above. As soon as the officer pulls the connection plug VS out of the jack VKl after the end of the call, the c-line to the group selector is de-energized and the voters are triggered in a known manner. When the c-core in the group selector is disconnected, the relays C, J, P and T in the OFLW are also de-energized. -With the release of relay ^ after hanging up the called subscriber, the magnet 5 ¹ receives current via: earth, contacts « ²⁹ , α ²⁶ and turns the control switch to position 12. In this, the release magnet M is excited via the battery, winding of Mj control switch position 12, contacts ²⁷ , earth and turns the OFLW back into its rest position, in which the head contact

z5 taktfe ^{28 is} closed and magnet 5 is excited ^{via c 27} , control switch position 12, k ^2S. The magnet S continues to turn the control switch to position 1. This means that all the facilities used for the remote connection are in the rest position.

Claims (3)

Patent claims:
i. Circuit arrangement for telephone systems with dialer operation, in which a desired connection line is pre-blocked before completion [the connection when a voter is set on this line, characterized in that when a connection point calls the pre-blocked connection line, switching devices are already present in the busy voter for other purposes (x) cause a signal to be sent to the officer monitoring the prepared connection. 2. Circuit arrangement according to claim i, characterized in that the signal (flicker) is given by intermittent short-circuiting of the monitoring relay (SR) at the officer's place. 3. Circuit arrangement according to claim i, characterized in that. the switching device (X) switches the circuit of a monitoring relay arranged at the officer's place and the monitoring relay is influenced via the new circuit in a manner suitable for the delivery of the special character. For this purpose 2 sheets of drawings