DE742659C - Circuit arrangement for telecommunications systems, in particular telephone systems - Google Patents

Description

Circuit arrangement for telecommunication systems, in particular telephone systems The invention relates to a circuit arrangement for telecommunications systems, in particular Telephone system fi, for the automatic checking of the operability of lines.

The object of the invention is the assignment of a line b to prevent a priori if they, or their associated facilities, in the direction opposite amplifiers, etc., ir endwelche disorders comprise the structure of a Compound or the proper processing of the call prevent and thereby the # 'RANSPORT - interfere.

According to the invention this object is achieved in that a group A test device is assigned jointly by lines, which has a test assignment of the lines by sending out a different from the usual occupancy pulse Initiates a pulse or by sending out one or more series of pulses (digits), are actuated by the switching means at the incoming end of the lines, which the Cause a pulse to be sent back to the outgoing line end, and that if the line is disturbed and there is no return pulse at the outgoing end of the line the blocking and identification of the disturbed lines is effected.

On a line, on the amplifiers switched on or also Malfunctions can occur on the other associated connection devices, which are not detected by the usual line monitoring. Will be such If a disturbed line is busy for a connection, it can, especially -if it is one off pipeline interconnected with several line sections, the structure of the Connection to take place to a considerable extent. it can even be completed but the speech communication is z. B. by one through the usual monitoring devices Unrecoverable amplifier malfunction prevented. The established connection must then be released and a new connection established via another line. As long as the disturbance is not remedied, fewer of these can of course be unsuccessful Connections are attempted via the disturbed line. If there is such a line, z. B. as the first free line, in multiple of the occupying voter, although n-och free, in good order lines are available, so the traffic with special needs. There are great losses of time. what with regard to Avoid economic use of the expensive pipelines at all costs is.

c. To solve the above-mentioned problem, especially with regard to disturbances on the lines in the line, a proposal has already been made which consists in sending a tone-frequency signal over the lines in the idle state , which only prepares the creation of the circuits when it is operational, otherwise it prevents the line from being connected by blocking the last Z> 2n.

Arrangements for testing lines are already known, e.g. B. Verbindungsleittin-, gene between two offices that are responsible for establishing a connection prevent the conclusion of the same. also lock and lock the line Trigger an alarm or busy signal. when the connection is disrupted. Such Arrangements are e.g. B. vc) considered for special circumstances, e.g. B. for testing the operational readiness of Leitunt> e #en under the influence of the neighboring door There are high voltage lines. For connecting lines over which several connection points are to be achieved, facilities are already known that after production of a Connection to one of the Aiischlußstellen automatically an examination of the sanitary bring about the connecting lines of unconnected connection points or lines.

The invention not only takes a different, new way of solving the similar task, but also offers ZD the advantage that it also detects disturbances in the transmission and connection devices of the line, ie. 11. -these are checked for their proper function. In particular, it also finds advantageous instructions in systems in which lines are controlled from the workstations via dialers.

Since the same characters lb Zt.

how to find the gel) in the long distance räuchlichen Aiiwendung additional Einrichel get refunds for the transmission of such characters in b discontinuance; nevertheless, the invention is not limited to Z, lines with Tonfrecitieiiz-, valil Betriel). It is also an advantage of the invention that you can get by with a test device at the outgoing end of the line with double-directional lines and that the test automatically comes into operation even if a disturbance occurs in normal operation while establishing a connection. The test facility is not significantly changed.

In the following, the refinement is in more detail on the basis of an example of execution Vc # rIzehr "l # ezuigt, bui cl () ppz # ItdirectedeinVerkehr, the test equipment is usually provided at both ends of the line Parts of the The mode of operation of the following: Ain the outgoing end of the Leituno, is (fine test device, PE provided, which is for a group of lines -uilleiiizaiii is Iind in the wes (#Iitlichen from a single Allza111 full relay with a line finder L ## ' . in which the lines are to prüfendvii ang2schlossen Dun individual k # I U -. g Started are at the ends ankonimz # e-NFLE still zugeordnut -iialtliiitt (#l relay X. 221 S-1) Diuse l # hiinvii well. as one for niehrcre Leitiiii-en,. for example line sgruppe, gen-, einsanie 1, direction atisgti); Idet be. Dor Leitiiii # "; sticlier is given in bust-timed intervals z. 13th by an additional second switch door aii", vl # i.; Seii and bt-adds the line to the line for testing. A special tone frequency serves as the occupancy pulse, ie \ - () in ordinary occupancy pulse z. 11 different impulse due to its length. This t # causes a pulse to be reset at the incoming l '-' end of the line, if the ZD line and its associated facilities are in order. If this I-return pulse arrives at the end, the test device is released and is switched to the next line with the second pulse of the ten-second switch and this is checked.

Which TEII time by; et but is some error on the power cord 23 b tung or their facilities or the amplifiers lying in Z, the line before, then Z, z # - # - is the Rückinipuls and after a festgc the release time on (#s relay is determined, a -: Marin is triggered at the outgoing end of the line, e.g. by a signal lamp, a # \ "corner or d 1-1. The line is blocked, the testing device The characters not used in the test document can also be used in remote dialing. The invention is not limited to lines with audio frequency dialing, it can also be used, for example, in inductive dialing Tone-frequency characters similar to the usual long-distance dialing characters are used for testing the amplifiers.

The facility can also be designed in this way. dafo the Prüftlii- clun on the arriving of the 1-vitulig bufindlichun Wäbler, I z. D. Group voters, includes. The test device then receives an automatic pulse generator and instead of the special occupancy pulse, the regular occupancy pulse is provided with one or more pulse series, i.e. H. a certain code number, sent out, and the aforementioned addition at the incoming end of the lines, is not assigned to the individual lines. but as a central, z. B. accessible via voters, multiple lines (line group) common facility provided.

In the case of lines for bidirectional traffic, it is because the blockage of the lines at the outgoing end, an identical test facility is required also to be provided at the incoming line end for the opposite direction. Of course the line can be blocked at both ends with just one test device be done from one end of the line, e.g. B. by a signal that after arrival of the return pulse at the outgoing end is sent to the incoming end and there the line is blocked for the opposite direction.

Xlit review of operational safety and faster locking disturbed lines, the device is designed so that it also works automatically comes into action when a connection is established during normal operation Fault occurs and z. B. an ordinary rear license plate, tax or any other character does not arrive at the outgoing line end, be it an incomplete There is a connection or some kind of malfunction. In the latter case speaks on the outgoing At the end of a relay that starts the test equipment, the ten-second switch temporarily switches off and a test, as described above, carries out what the ten-second switch is switched on again.

The following describes the checking procedure if, as assumed, the line to be tested is OK.

In the exemplary embodiment, the test device is activated by the ten-second switch SS . When the contact i s closes, the delay relay R is excited in the circuit: earth, contacts I s, 4 b " 3 al ', 2 t, winding of the relay R, battery. At contact 8 r the circuit of the rotating device D: battery , Winding of the rotary magnet D, contacts 8 r, 5 it, 6 t, earth closed. The rotary magnet rotates the arms of the line finder LS by one step and closes its contacts --8 d and 7 d via its winding I to respond, which with its contact 6 t interrupts the circuit of the rotary magnet and at contact 2 t the circuit of the relay R, which drops out with a delay. The rotary magnet is de-energized and opens its contacts 28 d and 7 d, relay T remains in the circuit via its winding II via the folded contact 2 t. Earth, contacts IS, 4 l ?, 3 , 2 t. Via contact 1 0 t , relay U is energized in the circuit - battery, resistance gli , Winding of relay U, contacts 9 r, io t, 12 an and earth. Rel ais U - closes its contact 16u in preparation in the circuit of the test relay P and with its contact iiu it closes a holding circuit for itself. Since this circuit is disconnected when relay R drops out, relay U is placed in a holding circuit via its contact 54 't with its winding II. It also opens its contact 5 It in the circuit of the rotary magnet D and with contact 13 li it closes the circuit of relay 0: battery -, winding of relay 0, contacts 131t, 14k, earth. Relay 0 has a long drop-out delay, when responding it closes its contact 1 7 0 in the test circuit - earth, windings I and II of test relay P, contacts 16it, 170, igk, selector arm, c-wire, button SpT, contact igsp, short-circuit of the winding 1 via contact 2, o c., Winding II of relay C, battery. Relays P and C respond in this circuit. At the same time relay 0 opens its contact-41 0 in the circuit of relay Z via its winding II. Relay C closes its contact 30 c in the circuit of relay H, furthermore its contact 4o c in the circuit of relay Sp and opens at contact: 2o c the short circuit of its winding I. The relays H and Sp respond. Relay Sp opens its contact igsp in the excitation circuit of relay C, which now remains excited via its two windings I and II.

Relay P # closes its winding I with its contact: 25 p. It also prepares its contact 35P in the circuit of relay Z, winding I, and ani contact 2? P it closes the circuit of relay M: earth, contalted: 2: 2p, 2.3k, winding of relay M, battery. With its contact: 261n, this closes the circuit of relay F: earth, contact: 26 in, resistance Wi 2, selector arm, wire d, windings of relays F and AL. In this circuit, only the relay F responds due to the resistance Wi2. With its contact 2-7f, it briefly lights up the signal lamp La, as a sign that the line is being checked. Relay 111 closes its contact 5: 2 in in the circuit of relay 0 and its contact 224m in the circuit of relay A and brings about: earth, contacts 24111.,: 2 5 P, selector arm, wire a, winding of the relay, -l-, let7 - more to address. Relay A applies an audio-frequency power source to the wires of the line in a manner known per se, whereby the occupancy pulse. which is longer than the usual occupancy pulse that is sent to the arriving end. Relay K hiiiiet its contact 23 7 when responding? in the circuit of relay M, which drops out with a delay and its contact i4k in the circuit of relay 0, which however now holds through contact 5: 2 ni until relay IM also drops out; Relay Al limits the occupancy pulse.

The SFI signal receiver - ' at the incoming line end is activated by the occupancy pulse. His pulse relay T responds and closes the circuit of relay M with its contact 3 1 i . The latter has a considerable pull-in delay and therefore only speaks to Xn-P on this longer test assignment, while it does not respond to the usual assignment pulse. Relay X causes, in a manner known per se, the placement of an audio frequency power source on the wires of the line, whereby a pulse is sent backwards to the outgoing line end. The In) pulse relay I responds to this in the signal receiver SE at the outgoing end. This brings the relay S 'to excitation with its .Kontakt 33 i. (read with his contact, s places the battery on the b <t34 -wire. This closes the circuit for the relay Z via its winding I via the voter-Lind, the contact 35 P. Relay Z is connected via its contact 36- with its winding 11 into a holding circuit and with its contact 29z separates the circuit of the test relay P of the line finder LS. When the relay P drops out, the earth for the relays K, Z and 0 is separated at the contact 22 P. Relay K 8finet its contact Sk im Circuit of relays F and AL before relay 0 drops out and can close its contact 37 0 in the circuit of the Alarin - reläi, g-, 41. The alarm signal - is prevented returned, so that as soon as the contact i s of the ten-second switch SS is closed again, the selector LS adjusts itself to the next line, which is checked in the same way as described above.

The following is an explanation of the processes that occur if as a result In the event of a fault, no return signal arrives at the outgoing line end.

The switching processes are the same as described above, until the relay S responds to the return pulse sent by the incoming Encl. If this does not respond to the outgoing cable, the relay does not respond, and therefore relay Z cannot respond either. Therefore, the test relay P niclit also drops out and as a result relay K remains activated, so that after the relay (7) drops out and closes., I, a contact 370 in the circuit: earth, contacts38k, 370-, voter arm .Aderd, windings of the relay F iind AL these two relays F and AL address. Relay AL is placed over its KOntal, # t42 (1 / and the -Alarinatisli # setaste, 4.T in a Haltestroinl # rei #; - the alarm signal lamp La is brought via contact 43 01 and a Any active Z, signal sent. The blocking of the lines and repeated Bele-un- successon at 2D t '11 25 response of the relay Sp via contact # 5 5 al. Relay Sp opens its contact 1 9 sp in the circuit of the occupancy relay C. so that this by drop and Umle-en his, contact 2o c can not respond as long as the problem is not solved relay... (-) closes after the waste Stronikreis for relay Z, winding II, and passes this on through the -separation of the test circuit and the drop-out of the test relay P the return of the contacts to the idle state.

The processes will now be explained that occur when, in normal operation, when a connection is set up, no backward character (e.g. message identifier i arrives at the outgoing line end.

In this case, the connection is disconnected as usual when the calling subscriber hangs up his receiver. In the assignment was on the contacts 30 c and -17 sP the relay H come to a response and adheres to opening the contact -17sP via the contacts 48 li -, 5ial and 4gi. If no backward character arrives, (read relay H cannot drop out because contact 49i is not opened. If the line at the outgoing end is released again when the receiver is hung up, then (read C relay and finally also the Sp This closes the circuit for relay Aii in the line finder: earth, contacts 46sp, 4511 -, resistance Wi 1, winding of relay An -, contacts 53 r, 15 k, resistor TT, 7i, battery. Relay Aji leaves the line finder LS on by with se: that imWechselspiel with relay T in a known manner, such as loading described already above the arms of Wälilers LS continued switches no Contact 5oai closes the circuit of DrehmagnetenD, run onto contact to this, to which the the The line requesting the test is connected. The circuit for the test relay is then established in the manner already described, and the relays U, 0, 111 and K respond.- The line is tested in de r described way. If there is no fault, e.g. B. with incomplete connection, if the. the called subscriber has not reported, then no alarm signal is given; because the return pulse to the outgoing line end comes through and the alarm is prevented, otherwise, in the event of a fault, no signal arrives at the outgoing line end, the alarm relay AL responds and gives the alarm signal. The test device is triggered as already described. The ten-hour switch SS is switched off when the test is initiated and switched on again after it has ended. Using the test button PT, the test can also be initiated by the officer on a specific line via the relay Aii.

Claims (1)

PATENT CLAIMS: i. Circuit arrangement for telecommunications systems, in particular telephone systems, for the automatic checking of the operational readiness of lines, characterized in that a group of lines (L) is jointly assigned a test device (FE) which enables the lines (L) to be checked by sending out a different from the usual occupancy pulse Impulse or by sending out one or more pulse series (digits) through which switching means (N) are actuated at the incoming end of the lines, which cause a pulse to be sent back to the outgoing line end, and that in the event of a disturbed line and no return pulse at the outgoing end the lines the blocking and identification of the disturbed lines (L) is effected. : 2. Circuit arrangement according to Claim i, characterized in that the switching means (N) are assigned individually to the lines. 3. Circuit arrangement according to claim i, characterized in that the switching means (N) together have several, for. B. a group of lines are assigned to "e_. 4. Circuit arrangement according to general claim i, characterized in that a test device (PE) is provided at each end of the line for lines for bidirectional traffic. 5. Circuit arrangement according to claim i, characterized in that in that is carried out at lines for bidirectional traffic, the blocking of the lines at both ends by switching means which i by a special, from the actuated one transmitted to the other end pulse. 6. circuit arrangement according to claim, characterized in that switching means (H to ) are provided, which automatically initiate the test assignment if, when a connection is set up, a customary identifier (e.g. notification identifier) is not transmitted back to the outgoing end when a connection is set up. 7. Circuit arrangement according to Claim i, characterized in that the Test device is assigned an automatic pulse generator, which has a specific code number for a The incoming end of the line sends out through which the connection devices (group dialers) assigned to the lines are simultaneously assigned and checked for their operability. 8. Circuit arrangement according to claim i, characterized in that the test device (PE) is assigned a line finder (LS) which is started at certain time intervals by a timer (SS) and connects the test device with the lines to be tested one after the other. G. Circuit arrangement according to Claim i, characterized in that switching means (F) are provided which, when the test is initiated, trigger a signal (La # indicating the test occupancy. Io. Circuit arrangement according to Claim i, characterized in that switching means (AL) are provided ., are that in the absence of the return pulse and presence of interference, an optical or Z; emit n audible alarm signal to the ab renzun- of the registration object from the prior art the following documents have been considered in the issuance process: German Patent -No 303,642. , 443 9:24, 594 9 11, 59.9 11 6, 622 343, 669 12.1; Austrian patent specification .. "- \ 7r. 8. # 922.