DE738705C - Local long-distance line selector with automatic activation - Google Patents

Description

Local long-distance line selector with automatic connection The invention relates to a circuit arrangement for telephone systems with local trunk line selectors, which enables the production of various valued connections. The known Circuit arrangements of this type are designed in such a way that in the case of a high-quality one Connection has a different mode of action for high-value and low-value connections jointly provided connecting organs through a special, from the high-quality Connections establishing the sent criterion causes throws.

The transmission of such a special remote criterion prepares especially difficulties in telephone systems with alternating current transformers. The aim of the invention is the circuit layout for high-value and low-value connections to simplify.

This is achieved by the invention in that switching means of the local trunk line selector in the event of an unsuccessful check for the freedom of the desired connection regardless of the value of the connection automatically both the busy and the connection cause characteristic feedback as well as a circuit for testing Close local and remote occupancy of this connection.

In the case of a low-value connection, this feedback is given by who the Binding point for sending the trigger criterion evaluated so that the test for local and remote occupancy in the local trunk line selector no longer us! In the case of a high-quality connection, however, no the transmission of the trigger criterion, the check for local and remote occupancy takes effect, and the body making the high-quality connection becomes switched to the desired connection.

The arrangement according to the invention therefore does not require any transmission special distance criterion in the case of a hocli "vertigen connection. All for high- and low-order connections jointly provided connecting organs are always effective in the same way. The different modes of action will only achieved in that the automatically; Sequence of switching operations in the case of a low value Connection and when the desired connection is occupied by the Automatically initiated the connection establishing the connection on the basis of the occupancy feedback Triggering the connecting organs is interrupted.

The embodiment is intended for a network, in -, velchem after Semi-automatic and fully automatic long-distance traffic can be handled and at which when the called subscriber is busy in all fully automatic and semi-automatic high-speed traffic connection, the immediate release of the connection he follows. In this system, depending on the result of the exam, is free. or occupied subscriber a different feedback to the feeding organ of the calling Participant given from which the signals are transmitted to the participant and when busy, the connection is triggered, in local traffic to the feeder of the calling subscriber, in network group traffic also up to this or, if the calling number will never! be! written out on a slip printer should, up to the counter.

This local pipeline selector is particularly suitable for operating systems which in addition to the handling of fully automatic long-distance transport also that of a semi-automatic Allow long-distance traffic using the same switching systems.

The individual switching processes in the local pipeline selector are as follows: The line selector is assigned in the c-branch, and in series with the C-relay also the V relay responds via its winding I. Contact c i bridges the rear Blocking serving head contact k 2, contact c 2 prepares the grounding of a local Busbar in front.

Now follows the first set of current impulses, which are applied to the A relay is transmitted. Contact a i sends the current impulses into the solenoid, while contact a 2 the 3rd winding of the relay T '' excited impulsively, so that the V relay after Interruption by the head contact k: 2 attracted during the first series of current impulses remain. To simplify the description, there is a Lifting rotary selector construction is based.

After the first series of impulses, the V relay drops out, and via contact v 2, the relay E with winding I responds and actuates with its contact e i also relay LT via its winding I. Contact u i controls the pulse circuit to the rotary magnet. The second series of impulses thus turns the voter on. That Relay E i drops after the last current surge, through which it weakens with contact a .I kept energized, and via contact e 3 the d-r d-branch is switched through, which in the case of a multiple connection, a further @ -i 'alternation of the 3rd winding of the A relay with the rotary solenoid and thus causes it to be switched on. As on the circuit diagram on the right, it is direct in the event of an input Earth applied to the connection contact so that the A relay cannot respond. The last contact of a% Iehrfacleanschluss is also switched. All earlier Multiple contacts are interconnected and via a break contact of the partial relay connection held against tension. In this case, the A relay will continue to come one of these: #, connections is free to respond, and the rotary magnet is switched on; the V-relay remains energized. The test relay P is connected to the c -Ast switched and can respond if the connection is free and with contact p .4 die Prevent further pulse transmission to the rotary magnet. At the same time, the On the rest side of contact p 3, the A relay is disconnected from earth.

1. Assuming that the subscriber line set is free, the test relay responds via the c-branch, contact p 3 puts a 6o-ohm winding of this U relay, whose winding I at, parallel to the high-impedance winding of the P relay Contact p 5 is interrupted. Since contact p 5 is designed as a double quiescent contact, the electrolytic capacitor lying parallel to the winding is switched off at the same time, so that the U relay only receives a dropout delay of about 300 m / s. This drop-out delay is sufficient to bridge the temporary short circuit of winding III through contact v 5, so that relay U is then held permanently via this winding III. The contact ¢ i has switched through the ringing circuit, namely the first call impulse is sent to the test immediately afterwards via the working side of the contact v 4. Contact p 2 applies earth to the b line via e 4 normally closed contact. Contact p 6 in series with v i, y 4 and e 2 quiescent side gives a feedback pulse of about too m / s duration with earth via the b-line during the first ringing current surge. If this feedback pulse, which must not be much more than too m / s, is to be 'kept shorter' than the first burst, a capacitor discharge circuit is switched on in this feedback circuit and the capacitor is dimensioned so that it discharges within this period.

After the TI relay has dropped out, the rest side of contact v 4 the periodic to-second call is switched on and in the meantime a second, winding of relay 'E applied with negative voltage. The second winding of the relay E takes over hence the posting monitoring.

A distinction must now be made as to whether the present connection is from a Participants or the operation of the 'semi-automatic Schnellverkehrsplatz-es set up and is counted by means of a slip printer or whether the connection from a remote callback station goes out.

In the case of a fully automatic connection or a semi-automatic high-speed connection, this system requires pure alarm feedback with earth via a three-wire line to initiate the counting processes, for example in a slip printer and to control the intermediate transmission organs in the speech state, which takes about 300 m / s. Further feedback, e.g. B. hanging up the called subscriber are not necessary and are usually omitted to simplify the transmission organs. Since the U relay is now held in parallel to the test relay in such a connection, further feedback is prevented by contact u 3. The message from the called subscriber causes relay E to respond, contact e4 energizes the Y relay, which continues to operate continuously. holds, Y switches the a and b lines through uni energized the A relay, and contact a 4 places an electrolytic capacitor parallel to winding EI, which makes this relay 3 to 400 m / s drop-off delay. Via contacts 2 and p 6 on the working side, the above-mentioned release feedback takes place as the last feedback in the case of the two types of connection mentioned.

- Contact a.2 also keeps the TI relay constantly energized and remains addressed during the entire connection. If, on the other hand, the connection is based on a remote place as shown in Fig. 2, then when the relevant connection line is connected to the common remote place organs by the toggle switch contacts A i to A 8, an excitation of the relay D is prepared, which has to distinguish between free and occupied cases. The number switch pulses are sent through the contact of relay A in the a-line, the feedback is sent to a relay M on the b-line and control the following processes in sequence: The first short-term free feedback is able to use the contact m 3 to Don't throw off relals. Contact at i causes relay T to respond, which with contact ti holds itself. When the current surge is over and thI drops again, relay P is excited via contact m2, and contact p 5 in series with contact yi applies relay A to a pulse breaker for one second, so that about normal dialing pulses via the a -Go lead. The relay R, which has a drop-out delay of one second due to the parallel connection of an electrolyte condenser, was excited with contact t2 and de-excited with contact p7.

The aforementioned series of current impulses reaches the A relay at the moment where the first ringer surge has just ended and the V-relay is about to return to fall off. It is then further excited by contact a 2 and closes with contact v 5 the 6o oh: mige winding III of the U relay short, so that this drops out and with Contact u4 switches the goo-ohm winding of the P relay directly to earth. This will the blocking of the c-branch is perfected so far that the activation of a further Connection is prevented.

Contact v4 makes it longer and therefore more different Remote exchange call initiated.

When the called subscriber reports, the secondary winding of the E-relay causes the hang-up feedback pulse of 300 m / s duration.

If the called subscriber hangs up again or flickers, the A relay drops out and after this the TI relay is delayed by too m / s. The hang-up message is transmitted over the b line via contact u 3 and 'v i.

If the subscriber hangs up again, A- responds first and then, with a slight delay, the TI relay responds again via winding III. In the meantime, relay E is energized via contact a 5 and v 2 break contact via winding I, which is delayed from 3 to 400 m / s due to contact a4 due to the parallel connection of the electrolytic capacitor. Contact e2 sends the detaching pulse with a duration of 300 m / s. As can be seen, in the case of the two types of connection mentioned above, the normally closed contact u 3 prevents these responses from being given.

As can be seen, the line is switched through completely symmetrically in the speech state, with only one normally open contact being provided in the speech line. Each time when hanging, a counter-winding of the Y-relay Y II is switched to the a-line with voltage via an a 6 break contact, and with the help! the officer is able to ring the bell after this winding. If it sends earth current surges over the a-line, the Y-relay drops out by counter-excitation, and "the normal state for long-distance calls occurs again. This enables the subscriber to be called again for the purpose of reporting charges.

II. The called subscriber is busy. A distinction must also be made in this case who-.den whether there is a connection of the first two types with the character a local connection or a remote connection.

When busy, the P relay and the relay do not respond U retains an electrolytic capacitor in shunt with its winding I, which it 2 seconds delayed power off. Contact u 5 is activated after the TI relay has dropped out earthed to the b-line for this period of time. This is in the feeding organ of the calling party or in the counting device, e.g. B. in the slip printer, the immediate The connection triggers which, by opening the c-branch, the test relay throws off and causes the rotary magnet to turn the selector into the rest position traced back.

If, on the other hand, the connection was made from a remote station, it does not take place @This tripping, and due to the automatic dropout of the U relay, on contact u d. shorted the goo-ohm winding of the P-relay, leaving the 40-ohm winding is able to address a line selector that has already been set, which is blocked against earth via P: Io and U6o with ioo ohms. The P relay is against it not able to respond in parallel to another P-relay, which is also, is connected to earth with only d.o ohms, as is the case with long-distance connections is. At the same time, the A relay is connected to voltage via contact u 6 and can be used at Multiple connections initiate a forwarding which leads to the ringing leads the first busy line. The present line selector circuit thus allows the same perfect selection as before with multiple connections usual full-fledged embodiments.

As soon as the P-relay responds, the connection takes place by the relay E with its winding II responds in turn and energizes the Y relay, whereupon the A relay is also switched on. Feedback will only be given at Transfer multiple connections. The remote seat has taken the speaking position anyway, since contact d 3 has energized the G relay. From then on is the course of the long-distance connection the same as with a free participant.

Finally, there is also the possibility, even in the case of a full or semi-automatic remote connection from the slip printer device or billing device from answering the free feedback in a series of current impulses, which the U relay drops and thereby remotely occupies the set subscriber line power. A ringing does not occur in this case, since the occupancy feedback is with the trip is answered. On the other hand, a remote callback connection can be avoided to an automatic or semi-automatic remote connection, if this is undesirable within the operating system. The switching means in the slip printer for sending the series of impulses, which the U-relay throws off, correspond completely the one shown in Fig. 2.

Claims (3)

PATENT CLAIMS: i. Circuit arrangement for telephone systems with Local long-distance line selector, characterized in that switching means (U) of the local long-distance line selector in the event of an unsuccessful check for the freedom of the desired connection regardless of the value of the connection automatically as well as the busy connection Indicate characteristic feedback, which is from a low-value connection building body for sending the trigger criterion is evaluated, as well complete a circuit to test for local and remote occupancy of this port. 2. Circuit arrangement according to claim i, characterized in that switching means (U) enable the test relay (P) of the line selector by switching its windings, address in the test circuit of a desired and occupied line and to switch the connection to the busy line. 3. Circuit arrangement according to claim i, characterized in that the switching means (U) are those of the test relay (P) switch the line selector controlled reverse circuit so that the desired busy line is marked as remote busy. q .. circuit arrangement according to claims i and 3, characterized in that the switching means (U) at Adjustment of the line voter to a free desired Leiturig under the influence an identifier sent from the point of origin of the high-quality connection, z. B. Impulse series, take effect and the test relay (P) for the purpose of blocking the Switch the occupied line against intrusion by other connections. 5. Circuit arrangement according to claim i, characterized in that the switching means (U) the supply and Feedback circuits of the line selector for the purpose of feedback on hanging and hanging of the called subscriber to switch to the start of the connection. 6. Circuit arrangement according to claim i, characterized in that the switching means (U) control the ringing circuit of the line selector in such a way that under (the influence of the exit point the high-quality connection a new ringtone transmission can take place. 7. Circuit arrangement according to claim i, characterized in that the switching means (U) when the line selector is occupied in a fully automated long-distance connection under the influence of the billing facilities sent identifier (series of current impulses) carry out the same operations as in Falliner connection established by the starting point for high-quality connections to a free participant. B. Circuit arrangement according to claim i, characterized in that that the switching means (U) when setting the line selector to a busy line in a low-value connection through the subsequent unsuccessful testing If the desired line is released, the connection is ineffective be made. 9. Circuit arrangement according to claim i, characterized in that that a before the beginning of the examiner in a certain state of excitement, z. B. excited, switching means (U) located independently when the desired subscriber is busy of the valence of the connection in the other state of excitement, z. B. de-excited, is transferred and thereby the feedback current surge characteristic of being occupied terminated, while if the desired line is free in the case of a low-order one Connection is held in the state of excitation existing before testing, in In the case of a high-quality connection, however, through a. through the notification of vacancy triggered current transmission on the part of the exit point of the high-quality connection in the other state of excitation is transferred and thereby the blocking of the produced high quality connection against impairment by other high quality connections caused. ok Circuit arrangement according to claims i, 8 and g, characterized in that that a switching means (U) with delay devices which is excited before the start of the examiner and with such a long delay when the line you want is busy falls, that the feedback sent up to its fall due to its length that the desired subscriber is busy and that the established subscriber is triggered Connection initiated. i i. Circuit arrangement according to claims i and 8 to io, characterized in that the delay devices of the auxiliary relay (U) at Freedom of the desired participant can be made ineffective. 12. Circuit arrangement according to claims i and 8 to io, characterized in that the switching means (U) has an auxiliary excitation winding (U III), which when the desired Participant is excited and under the influence of the current broadcast on the part of the high-quality Connections building point can be short-circuited. To delimit the The subject of the invention from the prior art is the following in the grant procedure Publication considered: German Patent No. 581 i25.