DE829178C - Circuit arrangement for telecommunication, especially telephone systems with dialer operation - Google Patents

Description

Circuit arrangement for telecommunication systems, in particular telephone systems with voter operation In telecommunications and especially in telephone systems with voter operation become high quality connections to one via a group of rectified lines reachable subscriber, a multiple connection, with blocking of all of its connection lines established via connecting lines occupied by low-order connections. To The setting of the last dialer - the connection path - is carried out through a preliminary check determined whether there is still at least one connection line of the selected subscriber free is. According to the result of this preliminary examination, the voter either presents himself to a free connection line or a connection line occupied by a low-order connection a. In the latter case, the body building the high-quality connection, e.g. B. the remote official, the possibility of forcing the existing low-order connection to separate. The preliminary test requires a considerable amount of switching equipment, some of which are assigned to the individual lines of the group.

It is also known that, after a group has been controlled, the same direction Lines of the voters from the calling station one after the other to the individual Lines of the selected group is set. The high-quality connection to be established is not occupied by another high-quality connection over the one reached first Leadership completed. It will then often happen that one through a low-order one The busy line was put into use although there are still free lines.

The invention now ensures that there are still free lines in a group are available, the establishment of high quality connections over them without using a special preliminary examination.

This is achieved by the connection path to the group rectified lines, the blocking of which is determined by successive testing was triggered, whereupon under the influence of an activation code a Voters only by individual number current surges on the successive lines of the group can be set.

The arrangement can be made in this way according to a further invention that the establishment of the connection (remote officer) after determination the blocking of all lines in the group triggers the entire connection path and rebuilds.

But it can also be influenced by the activation code Changeover relay that has become effective upon termination of connection tripping bring about only the voter assigned to the line group.

In the latter arrangement, the calling party only has the N umernstromimpenzreihen necessary to set the last selector of the connection path to send out. In addition, there is a guarantee that the initiated connection, provided that at least one line is only occupied by a low-order connection is present, can be completed, because the necessary for the completion of the connection Voters are available. Since only one voter triggered but not released this cannot be used for another connection and thus possibly the last free path to the group of rectified lines blocked will.

In the drawings, two exemplary embodiments of the invention are shown, however, to which this is not limited. Both embodiments lie Telephone systems'> grund.

When the line selector shown in the drawing is assigned, it speaks in this the relay C to: i. + in the occupying selector, wire i, contacts 2e, 3k, relay C winding I, -.

The relay C prepares the setting of the selector. The contact 2e will open. Contact 4e is closed. The winding II remains until first switching step of the selector via contacts 4e and 3k short-circuited. That Relay X responds to :. 2. -, contact 5`, resistor 6, relay X, +.

Opening the contacts 6x and 7x opens the switching path. The contact is also opened 8 times.

Number current impulses sent by the calling station actuate the relay E, the winding 1 of which is connected to the upper voice wire 9 . The current surges are transmitted to the lifting magnet H: 3rd +, contact ioe, control relay V winding I, contacts i i '°, 12 °, 13W, lifting magnet H, -.

The relay V short-circuits its own winding II at contact 14 ° and thereby obtains delayed armature dropout so that it occurs during the surge series does not fall off to lift the line selector. By opening the contact i5 ° becomes prevents the relay L7 (winding I) from being switched on prematurely.

If, after the end of the series of strokes, relay E remains in the rest position, the relay V drops out and closes the contact i5 °. Now responds, since the head contact 18k is closed, the changeover relay U responds: 4. +, Contacts i8k, 17e, 16 "', 15 °, relay U winding r, -.

Contact 1211 is opened. The rotary magnet is on contact i911 D brought under the influence of the current impulse transmission contact ioe. Is opened also contact 2o11. The relay L 'is located with its winding II in one Holding circuit: 5th +, contacts 2ik, 22e, 23u, 249, relay U winding 1I, -.

Number bursts sent by the calling station for setting the line selector to the connection line of a single line subscriber or affect the first connection line of a group of rectified lines the rotary magnet D: 6. +, contact ioe, control relay V winding I, contacts 1 i ° ', i911, 25p, rotary magnet D, -.

The control relay t 'is restored by short-circuiting its winding 1I delayed anchor drop and opens inter alia the contacts 26 "and 27" ". By opening -des contact 26`` '' prevents that when driving over a group of the same direction Lines to which the connection to be established cannot be established, the relay _1T responds via the collective contact sk. By opening the contact 27 ° a premature activation of the relay G which closes the test circuit is prevented. When the line selector is turned for the first time, the excitation circuit is activated at contact 16- 4 for the relay U interrupted, so @ that this when the contact 15` 'is closed after the end of the current impulse, it is not closed again. Also will also switched off by opening the contact 13W of the solenoid H, so that this can no longer be switched on after the relay W has dropped later, is the Line selector on the first connection line of the group of rectified lines is set, it speaks after the end of the series of impulses and the closing of the contact 26 ° the relay 11T to: 7. +, contacts 28p, 26 °, 29`` ', collective contact sk 3o / 31, relay M winding I, resistor 32, -.

The relay M opens its contact 33 '' ', so that if after another Switching step of the Schalta17171134 on the contact segment 31 runs up the winding I of relay M is not short-circuited. C flows through winding 1I of relay 1h1 no power, because the contact 35e of the occupancy relay is open. At contact 36 '"a circuit for the rotary magnet D is prepared, but since contact 2o11 is open, it is not yet closed. Simultaneously with the Switching on the relay M, the relay G is under the influence of the slow interrupter LU i brought. If 1_U i Plus is applied to the slow interrupter, the relay speaks G to: B. +, breaker 1- ("i, contacts 27 °, 37", 38g, 39e, relay G, -.

The relay G closes its contact 4o9 and then opens its contact 389. It therefore remains in the working position until the connection is released. The holding circuit 4 for the relay U is interrupted at contact 24g. The test circuit is closed at contact 4ig. The relay U has such a dropout delay that it only drops its armature when the test of the first line reached in the group has been carried out. If the line is free, relay f 'responds to: 9. +, contacts 21k, 22c, 23u, 41g, test relay P, windings I and 1I, switching arm 42,: 1der 43, isolating relay T, -.

By closing the contact 44p, the winding I of the test relay P is short-circuited. The connection line is blocked. Contact 25p is opened before contact 2o11 is closed. The rotary magnet D can therefore not be influenced. Contacts 46p and 47p in the speech wires are closed. Circuit 7 is interrupted at contact 28p. The relay M drops out and short-circuits its winding I via the contact 33 'and the collective contact sk 34/31. When contact 45p is closed, contact 48u is still closed. There is therefore the following circuit: OK. +, Slow breaker LU 2, relay U winding 1I1, contacts 48u, 49 ", relay E winding II, contacts 5o", 51a, 52 "°, 45p, rotary magnet D, -.

As a result of the resistance of the relay windings U III and 1? 1I the rotary magnet D does not respond. The relay L / is held in the working position. The relay E responds. The first call is sent out. At contact 53e, minus is separated from winding I of relay A and the alternating current source is applied via contact 54e. The ringing current flows in the following way: i i. AC source, contact 54e, relay A winding I, contact 46p, switching arm 55, subscriber loop, switching arm56, contacts47p, 57a, +.

The relay A cannot respond to the flow of alternating current because its winding II is short-circuited via the contact 57a. After the plus in the LU 2 slow interrupter has been switched off, the U relay drops out. Contact 4811 is opened. The winding II of the relay E is switched to the call switch RS via the contact 58u, via which at certain intervals, e.g. B. every io seconds, plus is applied. Each time the contact closes in the call switch, relay E responds and applies the call current source to the speech wires. Each time relay E responds, a dial tone is given for the calling station, as a buzzer FZ is applied to winding 11 of relay Y: 12. +, relay Y winding II, contacts 649, 65p, 66e, dial tone FZ, -.

If the desired subscriber answers during a pause in the call, the feed bridge relay A responds and switches the speech wires through to contacts 59a and Goa.

After the connection is terminated, the line selector is triggered in that the upstream voter plus is switched off from wire i. That Relay C drops out. The winding 1I of the relay M is switched on: 13. +, contact 6, k, 35`> winding II of relay M, -.

The winding II of the relay P is short-circuited at the contact 62e. The relay P drops out. The rotary magnet D is now switched on: i4. +, Contacts 36 "', 2o11, 25p, rotary magnet D.

The winding I of the relay U is switched on at contact 63d and opens circuit 14. The rotary magnet opens contact 63d when it drops. Relay U drops out. The interplay between the rotary magnet D and the relay U lasts until the selector reaches its rest position in which the contact 61k is opened. The circuit 13 is interrupted.

Is the first connection line of the group of rectified lines, on which the line selector is affected by the second series of numbered bursts acting on it has been set, occupied, the test relay P in circuit 9 cannot respond. The relay U drops ah. It closes circuit 14 at contact 2o11. The rotary magnet D is actuated and brings the selector to the contact set of the next connection line. The relay U responds and opens circuit 14. When a free line is reached the test relay P responds. The connection is completed in the manner described.

If all lines of the multiple connection are busy, the voter becomes after checking the last connection line on the one immediately behind it Bank contact set stopped because then the switching arm 3o of the collective contact is the contact segment 31 has left. The relay M drops out. It opens the circuit at contact 36 ° ' 14. The winding I of the relay M is short-circuited via the contacts 33'u, sk 34/31.

Is a high quality connection such. B. to establish a long-distance connection to the group of rectified lines, the long-distance officer receives the busy signal when she intervenes after dialing the number - the busy buzzer is applied to winding 1I of relay Y: 15. +, relay Y winding 1I , Contacts 64g, 76p, 77'u, 78 '', busy buzzer Bes, +.

The remote operator presses the AT key. Minus is sent to the Wire 67 applied. The relay Y responds. It prepares at contacts 68Y and 69Y precedes the switching path and completes that prepared at contact 71g at contact 7oy Short circuit of relay X. If this drops out, wire 9 is via contact 68Y, a capacitor and the contacts 72e, 6x with the switching arm 55 and the wire 67 via contact 69Y, a Capacitor and the contact 7x with the switching arm 56 connected. There is a buzzer at bank contacts 73 and 74 created. The officer recognizes from this that it is a connection to a group rectified lines, a multiple connection, and that all lines of the multiple line are busy.

The officer now has the option of establishing the connection via one of the to establish occupied lines. It first triggers the connection path and sets then a new connection path. Before setting the line selector in this' new connection paths she presses the AT switch, z. B. a toggle switch, and keeps them in the working position. The relay Y is continuously energized. Through open contact 29y prevents relay M in circuit 7 from responding if the line selector through the second series of bursts to the first connection line the group of rectified lines is set. Since the relay M does not respond, the circuit 14 can also not be established. The line selector stays on the first line. Relay X drops immediately after relay G has responded since the contact 70y is closed.

Since the line selector is set to a busy connection line is, the test relay P does not respond. The relay U does not drop out, because there is the following circuit: 16. -I-, contacts 79g, 75x, relay U winding I, -.

The circuits 6 for the rotary solenoid and 9 for the test relay remain therefore further prepared.

The remote officer is connected to the first line of the group. It offers the high quality connection. If the subscriber does not want to take the long-distance call because he is connected to a different high-quality connection, or because the low-value connection is more important to him than the long-distance connection, the long-distance officer sends out a single burst of numbered bursts. Since the relay U is energized, the rotary magnet D is actuated via the circuit 6. The line selector is switched to the next line in the group. If the subscriber reached via the second connection line wants to take over the high-quality connection, the second subscriber connected to him hangs up his handset, and the test relay P responds after the existing connection path has been released. The connection is completed in the usual way.

But reject all participants reached via the lines of the group the takeover of the long-distance call, the officer receives, if the line chooser reaches the contact set behind the last connection line, the indicator again. It recognizes that the high-quality connection cannot be established at the moment and triggers the connection path in the usual way.

The arrangement according to FIG. 2 differs from that according to FIG. i by the fact that after finding the blocking of all lines of the group only the The line selector that has been set is triggered and re-set by the officer. So it cannot, as is the case with the arrangement according to FIG. 1, in times of heavy traffic may be possible due to the approval of all voters of the connection route, the last free voter in any electoral stage will be occupied by another position. The group of rectified lines could then not be reached a second time will. Those contacts which correspond to those of FIG. I have the same Reference numerals as in Fig. I.

The line selector is set as described The only difference is that in the circuit 6 for the rotary magnet D, the contact Boy 'lies.

It is assumed that 3a1: 9 all lines of the multiple connection are busy. If the switching arms 55, 56 and 42 reach the free set of contacts behind the group of rectified lines, the following speaks in the test circuit: 17. -I-, contacts 21k, 94 ° '', 22c, 23u, 4ig, relay P windings I and 11, Switching arm 42, contact 81y, resistor 82, -, due to the high resistance 82, the relay P does not turn on. However, the voter is shut down in the manner described, since the relay 1'l7 drops out. The officer receives the busy signal when she is switched on. She presses the AT override key. The excitation of the relay Y has the consequence that a short circuit of the winding 1 of the sensitive relay F is canceled by opening the contact 8iy. This relay responds via circuit 17 and is placed in a holding circuit: 18. +, contacts 83c, 84f, relay F winding 1I, -.

Contact 85f in circuit 7 is opened. The contact 86f lying parallel to the contact Boy is closed. At contact 87f, the short circuit prepared at contact 71g for relay X is produced. The relay X drops out and closes its contacts 6x and 7x. The remote official is connected and receives the warning sign. All she has to do now is to temporarily bring the AT override key to the rest position. The relay Y drops out. The relay Ar responds: i9. +, Relay Ar, contacts 88y, 89f, 90 k, -.

At the contact yaw the holding circuit for the relay G is opened. This falls off. Opening the contact 92u 'also closes the Excitation circuit via the LU slow interrupter. The RelaisM will switched on via its winding I1: 2o. -i-, contacts 61k, 93ur, relay M winding 1I, -.

It closes the contact 36'u and thus the circuit 14 for the rotary magnet D. The line selector is triggered by the cooperation of the rotary magnet D with the relay U (winding I) in the manner described. The relay Ar drops out as the contact gok opens.

Before resetting the triggered line selector, the officer presses the AT override button again. The relay Y responds. The relay F is in the working state because its holding circuit is closed since the relay C did not drop out when it was triggered. Since contact 85i is open, the line selector cannot automatically switch to the first line in the group after the line selector has been set. The officer is connected and offers the high-quality connection. If the subscriber reached refuses to take over the remote connection, the line selector is switched to the contact of the next connection line by a number current surge, since the relay U is excited via circuit 16 and the contact i9 ° is closed. The closed contact 86f is located in the circuit 6 of the rotary magnet. The contact boy is open. If necessary, the line selector is set to all lines in the group one after the other. The officer receives the indicator via the contact record behind the last line of the multiple connection. It recognizes that the connection cannot be released at the moment.

A connection to a busy line can only take place if if all lines in the group have already been checked. The remote official wanted press the AT override button before setting the line selector for the first time, the second series of numbered current impulses cannot result in any setting of the line selector, because then contact Boy is open and contact 861 is not yet closed. The rotary magnet D cannot receive a rush current. So you always have to try it first be made to establish the connection to be established via a free line, before the switchover can be carried out, the use of a occupied one Line for the new high-quality connection to be established is permitted.

It should also be mentioned that the relay F only has one for everyone Voter accessible groups of rectified lines is available.

Claims (9)

PATENT CLAIMS: i. Circuit arrangement for establishing high-quality connections over a group of rectified lines in telecommunications, in particular telephone systems with dialer operation, characterized in that the connection path to the group of rectified lines, the blocking of which was determined by successive checks, is triggered, whereupon under the influence of an intrusion indicator (- an 67) a voter can only be set to the successive lines of the group by individual number bursts. 2. Circuit arrangement according to claim i, characterized in that after checking all lines of the group, the calling Place receives a note (HZ). 3. Circuit arrangement according to claim 2, characterized in that the calling station receives the indicator (HZ) via the switching path (68Y, 72e, 6x, 69y, 7x). 4. Circuit arrangement according to claim i, characterized in that one influenced by the activation code (- to 67) Relay (Y) prepares the switching path (68y, 69y), which controls the automatic movement switches off the initiating relay (M) of the selector via the contacts of the line group (29y). 5. Circuit arrangement according to claim i, characterized in that a sub changeover relay (F) that has become effective under the influence of the activation indicator Termination of the intrusion only triggers the one set for the line group Voter brings about. 6. Circuit arrangement according to claim 5, characterized in that that the changeover relay (F) is connected to a contact behind the line group is switched on by the relay (Y) receiving the activation indicator becomes (8iy). 7. Circuit arrangement according to claim 6, characterized in that the changeover relay is switched on in the test circuit. B. Circuit arrangement according to claim 6, characterized in that a changeover relay (F) common for all management groups that can be reached by the voter are provided. 9. Circuit arrangement according to claim i, characterized in that blocking devices (8oy, 86f) have a Prevent setting, the voter on contacts of connecting lines, if that Activation indicator before the desired line group overflows for the first time takes effect. ok Circuit arrangement according to Claim 9, characterized in that the blocking devices from parallel contacts (8oy, 861) of the direct Relay influenced by the activation indicator (Y) and the relay after overflow The relays (F) of the line group are switched on. i i. Circuit arrangement according to claim 5, characterized in that during the triggering of the selector a Auxiliary relay (Ar) controlled by the changeover relay (F) closes the test circuit prevented.