DE519713C - Circuit arrangement for telephone systems with main and in series sub-exchanges equipped for dialer operation - Google Patents

Description

The main patent relates to a circuit arrangement for telephone systems with main exchanges and serially arranged sub-exchanges equipped for voter operation, in which when establishing a connection through several sub-exchanges the connection lines and facilities behind the exchange of the desired Participants are released as soon as a switching process identifying the desired exchange takes effect will.

The present invention is a further development of the devices dealt with in the main patent and consists in connecting the main exchange with the next of the sub-exchanges in series connecting line is released when due to a series of current impulses the flag is given to establish the connection with any of the in-line sub-exchanges is.

In the drawings, an embodiment of the invention is omitted for the essence of the invention not relevant processes shown, and although show:

Fig. Ι a schematic arrangement of the connection devices of a telephone system with a main exchange (main office) HA and two sub- exchanges UA (sub-office) and ZA (intermediate office),

Fig. 2 shows the connection structure of an embodiment claimed according to the invention.

An intermediate office ZA is connected to a main office HA and a sub-office UA is connected to this. The participants in the various offices are designated in the sub-office with Te 3200 and Te 3211, in the intermediate office with Te 3300 and Te 3311 and in the main office with Te 44.11. Connections of the sub-office UA and the intermediate office ZA, regardless of whether in their own office or from one to the other sub-office or to the main office, always lead via the voter I. GW in the main office, who after marking the connection, if either the intermediate office or the Sub-office is desired, is released again.

*) The patent seeker stated as the inventor:

Dr. Maximilian Mathias in Berlin.

519718

When establishing * a connection, for example (see Fig. I) from the subscriber Te 3200 of the sub-office UA to the subscriber Te 33Ii of the intermediate office ZA , the two preselectors I. VW and II. VW, transformer Ue, connection line VL ₁ transformer Ue ¹ , intermediate selector ZW, connecting line FL ¹ , connecting line VIJ, the /. GW occupied in main office HA . The voter /. GW in the main office is set by the first series of current impulses together with the followers MS, MS ¹ in the transformers Ue and Ue ¹ . If the number of power surges in this series corresponds to the common code number of the two exchanges UA and ZA, i.e. 3, the connection line VL ² and the first group selector in the main office HA are released in a manner to be explained later. The dual selector ZW is simultaneously prompted to look for a free connecting line VL ^S. The second series of current impulses sent by the subscriber cannot act on the now switched on selector LW in the intermediate office, since a transmission of the current impulses via the connecting line VL? is prevented.

The further current surges required to obtain the desired subscriber influence the line selector LW which can be reached ^{via the line VL 3 in a known manner.} If the subscriber Te 3200 wants a connection in his own office, e.g. B. the participant Te 3211, the second series of impulses causes the //. VW. caused to another row of contacts, whereupon via the connecting line connected to this row of contacts, z. B. VL ¹ , and "line selector LW the connection to the desired subscriber is established. The connection is set up in the same way if the subscriber Te 3300 of the intermediate office connects in his own office with the subscriber Te 3 3 π or in the sub-office with the subscriber Te 3211. After switching to the other contact row of the //. VW , the connection is established via the connection line VL ⁵ , II. GW in the intermediate office, the line selector LW in the sub-office.

The circuit device claimed according to the invention and shown in detail in FIG. 2 will now be described. It is assumed, for example, that the subscriber Te 3200 of the sub-office UA wants a connection with the subscriber Te 3311 of the intermediate office ZA. If he picks up his receiver to establish the connection, the two preselectors I. VW and //. VW stimulated, and after their setting on a free connection line, z. B. VL, the connection is made via the call station of the calling subscriber to the bridge relay. A and B of the transformer Ue switched through. The two relays A and B respond and also relay C ¹ via the c-wire. The circuit for this relay is earth, battery, the two windings of T, contact arm of the /. and 27. VW, test wire c, winding I of relay C ¹ , head contact k, earth. The relay C ¹ closes for itself in order to keep itself energized after opening the head contact k , via its contact 1 c ¹ a holding circuit. The relay. C ¹ further includes on its contact 2c ¹ following circuit: earth, Kontakt2c ^1, Kontakt3a, winding of V ^2, V ¹ of the winding, battery, earth. The relay A has opened its contact 3a and closed its contact 5a. By closing this contact, the short circuit for the second winding of the relay C ^{1 was} canceled and the relay V ² short-circuited. The relay ^ has also opened its contact 4a . The relay C ¹ has also closed its contacts 6c ¹ and jc ^x . The following circuit was established via contact 7c ¹ : earth, normally open contact yc ¹ , test wire c ', winding I of C ² , head contact 8k, battery, earth. The relay C ² responds in this circuit and closes ^{a holding circuit for itself via its contact 9c 2} and its second winding. The relay also opens up a circuit for the rotary magnet D of the intermediate selector ZW ^{via its contact ioc 2} : earth, double work contact 10 c-, normally closed contact up, rotary magnet D, relay interrupter RU, battery, earth. The intermediate selector ZW rotates its contact arms 12, 13, 14, 15 until they have a free connection line leading to the main office HA, e.g. B. Fi- ¹ have found. The test relay P of this line responds as follows: Earth, double work contact ioc ² , Wicklungsll undl von P, normally closed ^{contact ΐόίί 2} , contact arm 14, test wire c ", winding of C ³ , battery, earth. The relay P switches by opening its contact up the rotary magnet D, and further causes by closing its contact the short-closure ljp the second winding of P. the relay P further on by closing its contacts 60p and 61p, the two opening cable cores of VL through. About the just described test circuit is also a Excitation current for relay 5 "is established via the normally closed contact i8z> ⁸ . The relay 5 "caused by the closing of its contact 1 gs the interruption of the test circuit for the subscriber Te 3300 in the inter-exchange, so that this ^T w hile the preparation of the compound of the /. GW in the main office HA not

can prove. The calling subscriber * now ends the first series of current impulses by dialing the first digit 3 of the required connection. As a result, the rush relay A in the transformer Ue is made to drop out three times. By closing the contact 4a three times as a result, these current impulses are transmitted via the upper wire of the line VL to the impulse relay A ¹ in the transformer Ue ¹ and the relay A ¹ is excited as follows: Earth, contact 4a, normally open contact 6c ¹ , upper line ' sader, normally closed contact 20 /, winding of A ¹ , battery, earth. Each time A ¹ is excited, the following circuit is established for the rotary magnet Dm of the synchronous switching mechanism MS ¹ : earth, battery, rotary magnetDw, contact2ία ¹ , earth. The contact arm 22 of the tracking switching mechanism MS ¹ is switched on according to the number of current pulses emitted. These current surges sent by the calling subscriber are transmitted in a known manner from the bridge relay A ¹ to the bridge relay of the I. GW in the main office HA , whereupon this voter is set. However, the current surges that are emitted also act on the tracking switching mechanism MS and cause it to be switched on. As a result of the drop in A , the contact 5a was opened and the short circuit for the relay V ² was thereby canceled. Relay V ² responds as a result and, by closing its contact 23z ' ^{2, establishes the} following circuit for relay B ¹ : earth, battery, normally open contact 23z' ² , lower wire, normally closed contact 24 /, winding of B ¹ , earth. Relay B ¹ responds and by opening its contact 25 b ¹ prevents the premature creation of a circuit for relay F. After the first series of impulses has been emitted, contact arm 22 of MS ^{1 is} on contact 2 ¹ J. This creates the following circuit have been formed: earth, normally closed contact 26a ¹ , normally closed ^{contact 25b 1} , contact arm 22, contact 27, winding I of the relay U ² , battery, earth. The relay: U ² responds and interrupts the short circuit for the second winding of U " by opening the contact 28« ^2. The relay U- interrupts the test circuit for the line FL ¹ by opening its contact ιβιϊ ² and causes it to close of its contact 2gu ² the switchover to the other test arm 15 of the intermediate selector ZW. The relay U "also interrupts the upper wire of the connecting line VL by opening its contact 30« ^2. The next series of current impulses (the second number 3 of the required connection) only affects the two tracking switching devices MS and MS ¹ . After the intermediate selector ZW is set to a free connecting line VL ^S , the selector LW in the intermediate office cannot be influenced by opening the contact 30 / i ^2. The contact arm 31 of the follow-up switching mechanism MS and the contact arm 22 of the follow-up switching mechanism MS ^{1 were} again advanced by three steps as a result of the current surges emitted. As a result, nothing happens with the tracking switching mechanism MS, on the other hand, with the tracking switching mechanism MS ^1, the relay F is energized as follows: earth, normally closed contact 26a ¹ , normally closed contact 25 & ¹ , contact arm 22, contact 32, winding of F, battery, earth. The relay F switches off the bridge relays A ¹ and B ¹ by opening its contacts 20 / and 24 /. At the same time, F switches through the upper wire of the connecting line VL by closing its contact 33 /. The relay U ² remains energized through its second winding. By opening the contact i6u ² the circuit for the relay P was interrupted, whereupon the rotary magnet D of the intermediate selector ZfF is switched on again to the relay interrupter RU by closing the contact 1 ip . The voter ZW now rotates his contact arms until they have found a free line in the second row of contacts 63 (see Abbr. 1), to which the lines leading to the intermediate office are connected. If this is the case, the following circuit is established: earth, double working contact ioc ² , windings II and I of P, working contact 29.W ² , contact arm 15, test wire d, winding of C ⁴ , battery, earth. The contact arms 1.2, 13.15 are now on the contacts 34.3 5.36. The calling subscriber now sends the last series of current pulses corresponding to the number 11 and thereby influences the two bridge relays A ² and B ² in a known manner, whereby the line selector LlV is brought in a known manner to the line of the required subscriber Te 3311. The required subscriber is now called in the usual way. If this answers, the connection is finished. The release of the connection in a known manner by placing the handset back again in rest position whereby all involved in the preparation of the compound n is ₀ facilities.

If the calling subscriber Te 3200 establishes a connection with a subscriber in its own exchange UA, e.g. B. the participant Te 3211 wants to have, the following happens. The first series of current impulses runs in the manner described in the previous exemplary embodiment via the transformers Ue and Ue \ tracking switching mechanism MS and MS ¹ to /. GW of the main office HA. The line to the main

amt is interrupted by the excitation U ² after the first series of impulses. The second series of current impulses (second number 2 of the required connection) causes the contact arms 31 and 22 of the tracking switching mechanisms MS and MS ¹ to be advanced by two steps. The relay F is excited via the tracking switching mechanism MS ¹ , which switches off the bridge relays A ¹ and B ¹ by opening its contacts 20 / and 24 / ^. The second series of impulses brought the contact arm 31 of the follow-up switching mechanism MS to contact 37, whereby the following circuit for the relay U is established: earth, contact arm 31, contact 37, winding of U, battery, earth. The relay U responds and puts through. Close its contact 3811 the following circuit for the relay U ¹ : earth, winding of XP, contact arm 39 of the II. VW, contact 40, line wire d ', normally open contact 38M, battery, earth. The relay U ¹ responds in this circuit and closes its contact 4IM ¹ , whereby the test wire c is interrupted. By closing the contact 41M ¹ , the rotary magnet of the II. VW is switched on again to the interrupter in a known manner. Of the //. VW turns its contact arms and looks for a free line in the second row of contacts 64 (see Fig. 1), to which the lines leading to its own office are connected. If he has found one, his contact arms are on contacts 42, 43, 44, whereby the following circuit is formed via his contact arm 39: earth, winding of XJ ¹ , contact arm 39, contact 44, line core cf ", winding of C ^ß The other series of current impulses then act in a known manner on the bridge relays A ³ and B ³ and cause the line selector LW ¹ to be set to the required subscriber line of the subscriber Te 3211.

If the subscriber Te 3300 of the intermediate office ZA connects to the subscriber. Te 3311 wishes in the same office, the following happens: After setting the 7th and 2nd VW , a circuit for winding I of relay C ^s is established as follows: O closes a holding circuit for itself via its contact 45c ^5. C ^{5 also} closes the circuit for the relay V ^s via its contact 46c ⁵ . V ^s closes its contact 47 ^ ³ , as a result of which the relay S is switched off and an assignment on the part of the sub-office UA via the /. GW of the main office is prevented by short-circuiting the test relay P. The bridge relays A ^ and B ^ respond via the subscriber loop. The tracking switching mechanism MS ² and the LGW in the main office HA are set according to the selected number 3 (first number of the selected connection) through the first series of impulses. The contact arm 48 of the tracking switching mechanism MS ^{2 is switched} to the contact 49 by the second series of current impulses (second number 3 of the desired connection). This creates the following circuit for relay XJ ³ : earth, contact arm 48, contact 49, winding of XJ ³ , battery, earth. The relay U ⁸ closes its contact $ cm ^z , creating a circuit for the relay U * . U ⁴ closes its contact 5iwV This switches to the other row of contacts 66 (see Fig. 1) of the 2nd VW and at the same time the rotary magnet of the 2nd VW is restarted in the known manner. The voter turns his contact arms and looks for a free line in the second row of contacts to which the lines leading to his own office are connected. If he has found one, the contact arms of the 2nd VW are on contacts 52, 53, 54. This creates a circuit for the relay C ⁴ via the contact arm 55 of the 11th VW . After the closing of the contact 51 u * the connection devices of the main office ^ £ L4 were released again. This was followed by the delivery of the other series of current impulses corresponding to the digits 11 of the desired connection, whereby the bridge relays A ³ and B ^{2 are} influenced in a known manner and the setting of the line selector LW to the required subscriber line of the subscriber Te 3311 is effected. After the connection is terminated, it is released in a known manner.

Claims (6)

Patent claims: i. Circuit arrangement for telephone systems with main and serially equipped sub-exchanges according to patent 408 764, characterized in that the line (VL ³ ) connecting the main exchange to the next of the sub-exchanges in series (e.g. intermediate exchange ZA ) is released when the signal is given by a series of impulses sent by a calling station of a sub-exchange that the connection is to be established with any of the sub-exchanges lying in series. 2. Circuit arrangement according to claim i, characterized in that when the line (VL ") leading to the main switching point is released, the calling line via a connection device (ZW) in the sub-switching point (Zwi- interchangeability ZA) is connected to a further connecting device (LW) via which connecting lines can be reached. 3. Circuit arrangement according to claim 2, characterized in that after releasing the connection line (FL ² ) to the main exchange, the influencing of the connected connection device (LW) by the one to be sent out by the calling station, the desired series of sub-exchanges characterizing the series of current impulses is prevented in order to from remote sub- switching centers (UA) outgoing connections to save the connection device (//. GW) which connect the calling line to the desired switching center (ZA or UA) with ■ connections from other switching centers (ZA or HA) . 4. Circuit arrangement according to claim 3, characterized in that the tracking switch (MS ¹ ) causing the release of the connection line (FL ² ) to the main exchange also prevents the connection device (L W) from being influenced by the series of current impulses characterizing the desired sub- exchange (UA or ZA) . 5. Circuit arrangement according to claim 3, characterized in that the influencing of the connected connecting device (LW) in the intermediate exchange (ZA) is prevented by interrupting the impulse line (α). 6. Circuit arrangement according to claim S, characterized in that after the termination of the series of current impulses characterizing the desired sub-exchange, switching means (F) which switch through the interrupted impulse line become effective. For this purpose 2 sheets of drawings