DE1762787B2 - CIRCUIT ARRANGEMENT FOR COUPLING PANELS WITH COUPLING RELAYS THAT HAVE TWO STABLE SWITCH POSITIONS (TOGGLE PANELS) IN REMOTE SIGNALS IN SPECIAL TELEPHONE SWITCHING SYSTEMS - Google Patents

Description

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The invention relates to a circuit arrangement ,, .., for coupling matrices with coupling relays arranged in the form of coordinates, which have two stable switching positions, of which one switching position is assumed when the connection is switched through, the other when the connection is released (toggle switch matrices), in telecommunications, in particular telephone exchanges, in which a predetermined potential is applied to the wires when connections are switched through, but in the idle state the wires in the coupling network ίο are potential-free; "■," v. ■ 'γ: ■;'/.'.■' [ ^: ,, ... .1 ·',, ....

In such Kippkoppeif eidern 'is to through'' ^: switch the coupling points _o a short current impulse is given to the coupling relay,' when the connection is released a second one, which * 'however''either runs in the opposite direction or via a second Winding causes a Umgekefirite 'iVIagrietisierung. In the idle state and a connection, the coupling relays are de-energized.

The switching matrices differ essentially from relay switching matrices, their crosspoints remain switched on as long as the coupling relay has a holding current flowing through it. One It is triggered by disconnecting the holding circuit. -

Accordingly, a connection in such a relay switching network can only then not or only are incompletely triggered if the holding circuit fails due to an earth fault or a shunt is separated, or individual contacts "stick", i.e. there is an error.

In the case of the toggle switch, on the other hand, it is occasionally omitted! a trip,. if the Auslöseiinpi ^ lSi. _: to; .- short `` Gder;: z ^ L-; Sdjiw3cli. was; the coupling relay can sometimes tilt in this way due to incorrect operation or a mechanical shock; that ^: the contacts close. Closed coupling contacts do not necessarily require an error that must be corrected immediately or later after this switching point has been blocked. In this case it is sufficient to 'catch up' the required trigger pulse without the error alarm being given. · '· ·

A special determination of crosspoints that are still closed in a separate test process or permanent monitoring of the lines, as for example in the German interpretation documents 1152 158 or 1 210 049 for relay coupling fields described, can also be omitted.

If the Kippköppelfeld ,; in dependence of _ Devices is controlled that its free-occupied state on the basis of the control signals supplied to it map, this image deviates from the actual free-occupied status in the aforementioned Cases of hanging crosspoint contacts.

The invention is based on the known object of correcting this deviation, insofar as it is becomes disruptive, and / or to prevent with the help of a circuit arrangement that. over not open Coupling contacts of a switching matrix faulty connections (e.g. so-called double connections) states come, for example between two participants who are not interested in a conversation with each other to have.

Non-annoying hanging crosspoints can remain connected. For the exam should If possible, no additional time and no additional release program are required. The Effort should be kept as low as possible.

w,, There are schoii known some circuit arrangements, those at coupling points of Kippköppelfeldern Disconnect uninterrupted connections in good time before a new connection. So is for example In the German Auslegeschrift 1 213 006 a switching matrix with latching relay is described, in which after Termination of a connection this is not disconnected at the crosspoints, but for so long remains switched through until a new connection is to be established via these crosspoints. Only then are all coupling relays triggered in the row and column in which the selected one is located Coupling relay is located, and immediately thereafter a renewed connection via another winding of the coupling relay.

This circuit arrangement has the disadvantage that each coupling relay must be equipped with three windings. The tripping current to be switched assumes such strengths that it causes noises on the neighboring wires. Separate switching measures must then be taken against these noises. The large currents require a special switch outlay, in particular power transistors instead of simpler designs. In addition, the power supply must also be dimensioned accordingly. ;:; _; ; · "■., · - ■

For monitoring of. Kippköppelfeldern is a circuit arrangement, for example from the German Auslegeschrift 1 240945 known to offer, access and. Trigger two special Signal wires used. In one of them, in the accessibility '"ä' ^ id Normally closed contacts of the coupling relays in a row or in a column are connected in series, via which the setting and the release process is monitored. This circuit arrangement has the disadvantage that additional Contacts are to be provided for each coupling relay. Despite the high effort, you can do not rely on the test result, because only this one contact is actually monitored and from its position only closed on the switching position of all other contacts of the coupling relay.

It is also a circuit arrangement, ζ. Β. by the German Auslegeschrift 1 243 733, known according to which the connection of each connection takes place in three time stages. In the first stage the coupling relays are energized and thus the speech wires are switched through without the output of the coupling field to prove. In the second stage, the connected wires are not described in more detail Way checked for flawlessness. Only in the third stage is the output of the r switching matrix effectively occupied, if one is found Error but instead initiated an error localization. This: circuit arrangement does not serve in addition, disruptive deviations "of the free-occupied state in the switching matrix from its mapping to correct in the control devices, because there are no stuck contacts again opened, but only located for the purpose of decommissioning and a later repair. To locate each coupling relay must be equipped with an additional winding, which is a considerable requires additional effort.

The circuit arrangement according to the invention solves the problem in that each time a connection is established each of the wires connecting to

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a seitigt to a centrally located test device, and is connected belonging either by correcting the "coupling ^ potential examiner to fixed ^field; whether the wires, which contains the test device when initiating the encryption several potential binding at the end of the previous. Conversation potential checker - one for each wire. This has the advantage that they are tial-free, are still potential-free: 5 that even in the event of errors, for example when "gluing", if a potential (earth, minus or plus) vof ^ one single contact or with wires is found that, for example, by not touching ground or with another wire opened contacts of a toggle coupling relay effectively ver ^ the wires (asymmetry) a double connection, the test device is prevented from triggering the new one.

Connection initiates, and that this triggering of io. In the event of such errors, the test device responds to the switching means that also responds every time a connection is established via the faulty end of the call, usually the connection point of the switching network. To trigger gene. ■■.,. ■■. ■■ ■ ..: r:. /:; ■, now the maintenance staff on this error. Because each connection is made noticeable in the usual way, if the call is repeated at ¹ immediately after the end of the conversation, the test device is released according to a next-r, it is sufficient to follow the path up to when a new connection is established according to the invention .the error! - structure a short check for existing adhesive points is indicated. : and / or error alarm ^ to carry out potentials. That has the advantage of giving. · ■; ■. "■■ ..--.:.; ■. ■; ·,;: ^r . ■: ■■ :. ■ .:"; : ■ "■: y -.-- ■.: ■:. [': The test device only rarely gives a reason. An expedient embodiment of the invention finds complaints. the circuit arrangement according to the invention possible, which; normally not borrowed from the wires to simply trigger the new connection normally, the connection is present If a subsequent tripping current surge is still selected according to the diode-earth method, this potential is also not the one. The switching means are suitable as a reference potential for triggering. Furthermore, it is irrelevant that at the end of the conversation they also perform the appropriate task of comparing the potential of the official ministry. . not to 'the earthed battery pole>

According to a known circuit arrangement that speaks, i.e. normally negative potential, or a partial voltage thereof, for example in the German Auslegeschrift 1198 421 30, because it is possible is described, are also in each case that there are different ^ resistors weave construction, the cores of the connection with such a potential formed on the wires and could remain an error undetected with "one belonging to a testing device Potential- this manner. ^1.,, controller connected to determine whether the veins It is therefore another in a Training that was proposed when the connection was released at the end of the invention to select a different polarization of the previous conversation than that of the office battery, for example the one that is still potential-free. For this control, a positive potential with respect to earth however - in contrast to the invention - to The circuit arrangement according to the invention at least one core of the circuit-switched speech provides, in a practical embodiment that way a special test potential turned 40 first all switching stages of the switching network, but its lack of a criterion for a good statement, without the input ^stage: where the Teilnehmerist. Since the test potential is only connected to the individual line, it is switched through. The wires are to be applied, a number of connection has the advantage that the longitudinal voltages and the points for this potential in the speech paths residual charges as well as possible disturbances of the parts are present or created. In addition, even with this circuit arrangement, a fault in the switching system cannot influence the measurements of the internal lines. _; ■■■ ,. It is only signaled and not in accordance with the task. An example of the invention will be "cleaned" on the basis of the setting of a switching matrix. Drawing explained; In doing so, using

In contrast to this prior art, Fi g. 1 the potential relationships of a connection, the circuit arrangement according to the invention does not require any additional test potentials. This was demonstrated by the Pr facility; :: :: Advantage that the connection points and the connections are saved. In the coupling field ... which consists of two potential testers P1 and Pl , there is also no reference to, which is only required for a test. ; Potential, which may be a cause of malfunction 55 FIG. 3, it is then explained in which cases this could be. Test device Pr responds and an actuated head

An incorrectly closed contact is reset to the rest position when the pel relay is set back. The invention is not initially regarded as an error, but rather the switching matrix according to FIG. 1 consists of more than one attempt is made to re-establish this contact to the switching stages KS1, KS2 to KSn. The partial open. This is advantageous because the operator Tn are not unnecessarily alarmed via subscriber lines TL and service personnel, in particular also in unexpected subscriber circuits TS with the input coupling offices, and are connected to an activity stage KS1 . Regardless of whether the speed is employed, the switching itself is able to carry out the connection between two subscribers Tn of its own. . ·. NEN office is built up, or whether they have the, result of this self-correcting the disturbing line 65 Ltg to a downstream Eernmelde-, differences between, the Kippkoppelfeld and are: plant leads, a Verbindungssätz VS to the. the illustration of the free-busy status of the one wires of the connection switched on. v; ' individual coupling contacts in the control device. Private branch exchange,

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then in the idle state there is voltage the official acts in a manner not shown in detail, a command,

battery on one and earth on the other speaker automatically releases the connection.

vein of the subscriber line TL from the subscriber acts.

switch on TS . But as soon as the connection between FIG. 3 is first the effect of two participants of the own office through -5 the test device Pr for the fair is explained, both participants are switched to the same that in one or more of the coupling stages KS η office from the connection set VS with direct current to KS 2 a no longer occupied cross point k that is fed. In the case of an outgoing connection, which should be open, is (still) switched through from one of the input line Ltg mostly DC-wise, mentioned reasons. So that only the subscriber Tn from the connection io Fig. 3 only three lines 1, 2 and 3 and three set VS is supplied. Columns 1 ', 2' and 3 'with a single wire, in the case of a public telephone system are for example the wire a shown. The coupling relationships with regard to the feeding of the subscribers point k of row 3 and column 2 'is similar to the example. First, this is done from the subscriber way at the beginning of a new connection setup circuit TS and afterwards from another point, 15 encountered in the closed state. If now, for example, from the facility that sets up the path between line 1 and column 1 'who picks up dialing pulses from the subscriber set Tn. den, so is the cross point k for this path. As soon as the speech arteries at any point against outside of the interest, it does not need to be taken into account the potential of the subscriber feed to be cordoned off. If there is a different connection, the contacts that are in the speech 20 verbally or even solely on the way from line 2 to aderri are mostly switched through by another span column 2 ' , so the point k ebident source interferes with fritted . if not. Only when the connection 2-2 'is also assumed for the example of the invention that the path 3-3' is also connected through, the dialing pulses are not shown. there is a double connection. The potential tester Pl organ are included and then the connection for the wire α now checks from column 3 'and finds connection to the subscriber Tn from the connection set VS via the closed contact k the feed span is built up (backwards), with the speech of connection 2-2 '. Since the connectors α and b at the output of the coupling stage KSn have now also switched through to 3-3 ', this will be the last next to be potential-free. established connection immediately in the described

A test device is then triggered again at a central point χ.

device Pr switched on, the details of which in FIG. 2 Depending on the characteristics of the switching system

are shown. Since there are two wires to be monitored here, the subscriber now receives the busy signal

are, the test device Pr consists of two potentials and he must choose again or it will be due to the

tialprüfernPl and P 2, which - possibly via a connection request still stored in a connection coupler - are selected and each with a new path through the switching network

Wire are connected. switched through.

The two potential testers P1 and P 2 are full. However, if the coupler shown deteriorates in the same way. They essentially consist of two transistors Tl and Γ 2 or Γ 3 between row 3 and column 2 ' 40 the state of the crosspoint k is not. At the end other is operated in npn circuit. The basis of the conversation is this coupling point with the transistors Π and T 2 is about some here solves, without the testing device Pr to address not more interesting components with the needs. This means that the cause of a double connection wire α and that of the transistors Γ 3 and Γ 4 are switched off with the connection, the switching network has connected itself to wire. Corrected at the emitter of all four transistor 45s.

ren there is a potential + Ul , which in this

game is + 6 V. However, the collector of the transistors is designated th - automatic cleaning

T1 and T 3 are only possible via a resistor to earth if the coupling point is closed

connected, while the collector of the transistor can be opened again when triggered. However, if the ren Tl and T4 in a similar way on a chip 50 is not the case, because, for example, the

voltage + t / 2 of e.g. B. 12 V is. release circuit is interrupted, so it is

The collectors of all four transistors are obviously over to an error that can only be caused by

Decoupling diodes D1 to D 4 as well as other measures taken by the maintenance staff can be remedied

Switching means (not shown) with a gate G can be used. To identify such errors is already a

. bound. ; 55 series of circuit arrangements known.

The potential + U1 is the reference potential. For example, the test device Pr can be connected to positive and negative voltage counters that respond each time. As long as the input coupler has not switched through in the respective coupler another potential level KSl , the tial was found than expected. Normally makes wires α and b potential-free. The counter concerned 60 states that this coupler several potential testers P1 and P 2 therefore do not respond. The connection is released times in succession. However, if a potential has been erroneously caused, this coupling point or on one of the wires or on both, be it feed: this coupler, is blocked until the error has been rectified. potential, the full or part of the exchange voltage. At the same time, the built-up or ringing alternating voltage up to this point, one of the 65 ways speaks, is displayed or printed, or only potential tester Pl or P 2 or even both is triggered and an error alarm is given. In any case, even when a potential is applied across the diodes D1 to D 4 at such a fault, the occurrence of a double output 2 of the gate G. This potential connection is effectively prevented. ■■ '... -

Claims (5)

So that longitudinal voltages on the subscriber line TL do not allow the testing device Pr to respond incorrectly, the switching network is initially only switched through in the switching stages KSn to KS 2 . In this way, the influence of the interference and potentials present on the outside of the subscriber lines is avoided, and the measurements are carried out in a spatially and electrically manageable area up to the intermediate line of the input coupling stage KS1 . The residual charges on the internal line sections are so small that they do not interfere with the test. Only when this part of the switching matrix has switched through properly, the input coupling stage is also actuated. In this input coupling stage KS1 , the observation and resetting of an incorrectly closed contact takes place in a somewhat different way than was previously shown for the coupling stages KS 2 to KSn. As already described with reference to FIG. 1, supply potential is already in the idle state at the two speech wires of the subscriber line TL and thus also at the input to the coupling stage KS1. A contact k closed here is already noticed in connections that are established from the connection set VS to the subscriber Tn as soon as the contacts of the coupling stages KS η to KS 2 close for the new connection. An interfering coupling contact k , which is wrongly closed in the input coupling stage KSl which has not yet been switched through, is therefore already opened by resetting the coupling relay when a connection via the coupling point k was provided in the route search network. Because when the connection is triggered via the coupling stages KSn to KS 2 , this coupling relay is also recorded. In the case of connections originating from the subscriber who is connected to line 3, this coupling relay is reset as soon as column 2 'is used for this purpose. As long as there is no other connection via column 2 ', this subscriber is not hindered in any way. The subscriber circuit TS can also be constructed so that the contacts of the relay T, not shown, belonging to the subscriber Tn of interest, via which the supply potential is applied, already open and disconnect this potential when the coupling contacts of the coupling stages KS 2 to KSn switch through.