DE881068C - Circuit arrangement for telephone systems with dialer operation - Google Patents

Description

Circuit arrangement for telephone systems with dialer operation The invention relates to a circuit arrangement for telephone systems with dialer operation, in which the call device of a connection device upstream of the final dialer, e.g. B. is assigned to the 1st group selector. With systems of this type must be done after Free examination, the final voter set on a subscriber line an incentive back to the connection device provided with the call device, through which the call transmission is initiated. With known arrangements! this incentive is given by switching means of the final selector depending on the test relay. Such an arrangement, apart from the fact that it has additional switching means in the final selector requires the disadvantage that only subscriber lines on the other hand, no further connecting lines can easily be connected can, because when setting the final voter on a connection line also the incentive to transmit ringing currents. what is not wanted.

The invention provides an arrangement which overcomes this disadvantage. You achieve this by training the subscriber circuit in such a way that when Free checking of the final voter on a subscriber line from this an incentive back to .the connection device provided with the call device is transmitted, through which the ringing current transmission is initiated. According to the invention! e The incentive to transmit ringing current has the advantage, on the one hand, that additional switching means are not required for the incentive because it can only be obtained with the help of the Participant relay accomplish, and that also to the. Final voters without further ado Subscriber lines can be connected, on the other hand it offers the possibility of to use other voters of the office in many ways. .So it is z. B. possible to the first group dialer in addition to lines that lead to the next dialing level, as well as subscriber lines to be connected if, for example, this is ensured by a decade contact, that the voter not only in free choice, but also in controlled voting on one specific line can be set. One such application results z. B. in the case of office expansions or an occasional temporary one Interconnection of several exchanges through which the participants of the various Intermediate communication should be made possible.

The invention is explained with reference to the embodiment shown in the drawing: Fig. I shows a subscriber circuit according to the invention for preselection operation, Fig. 2 such a circuit for call seekers; Fig. 3 represents an I. GW and! Fig. 4 shows a line selector.

It is assumed that a subscriber wishes to establish a connection with another subscriber in his office. After lifting the receiver, the relay R in the preselector responds via its winding I, whereby the preselector is started in a known manner, which sets itself to a free I. GW (Fig. 3). The test circuit. takes the following course: -, T (I), ri, c-arm of the VW, uiv (1st GW), cl, kiI, A (III); Si, -f-.

In this circuit the relay T responds, stops .the preselector and switches through its contacts ti and t1u .the connection line to the I. GW. The winding II of the relay T maintains the test circuit after the winding I is switched off by the relay R. In the I. GW the relay A responds, which with its contact a111 switches on the relay C in the test circuit. Via the contact c1 the. Dialing character. switched on, which is transmitted by inductive transmission to relay A, which is maintained via the subscriber loop. . Upon receipt of the dial tone the subscriber sends the first Stromstoßgreihe, which serves to adjust the I. GW, from .. The by the relay, current surges recorded A are transferred to the following circuit for the solenoid R: +, all, CVI c i1,. woi, H; -.

When the relay A drops out for the first time, as a result of the short-circuit being removed: the relay U responds via its winding I, which with its contact 2t111 switches on the relay A i in the circuit -I-, cv, woil, UM, A i, -. Due to its drop-out delay, the relay U remains constantly energized during the series of current impulses and only drops out again after the series of current impulses has ended. As a result, the relay C i is switched on in the circuit -I-, cv, WO ") Uli" a In, C z (I), - which is awake drop of the relay A i via its contact c iiv and its winding II continues in the circuit -I-, cv, pI, shorting bar a, T (I), w ii, 21i, C IIvy C i (II), -.

In this circuit, the relay T responds, so that the following circuit for the rotary magnet is closed: 'i-, C6 I v, cIII, tvI, CVI, C I1, plII, rv, 0h The rotary magnet responds and switches with its Contact d the relay A i, which responds and with its contact a iv interrupts the circuit for the rotary magnet again. By alternately working between the rotary magnet D and the relay A i, the group selector is switched on in a free choice. When a free line selector is encountered, the following test circuit is closed: -I-, Cii, P (II), Uli, C Ivi, P (I); c-arm of I. GW, ui (Fig. 4), C, Wi, c, k, D, -.

The relay P responds, blocks through its contact pi and switches through the speech wires to the line selector with its contacts and plv. In addition, the following holding circuit is established for relay T through contact p111: -I-, T (II), pnI, rv, ki, D, -.

The relay T thus remains through-the after its winding I has been switched off Contact pi further excited. In contrast, the relay C i is de-energized and drops back.

In the line selector the relay C responds, which with its contact cII the relay V in the circuit -1 -, CI1, woü, short-circuit bar 2, V (I), -switches on. The Intakt viv prepares the circuit for the lifting magnet and the contact vili prepares the current surge receiving circuit of relay A. The further series of current impulses sent by the subscriber for setting the line selector is transmitted from relay A of the I. GW to relay A of the line selector by means of contact a1. The LW solenoid receives the current surges in the following circuit: +, uIh all, .SIh vIvy WO " H, -.

The relay S already switched on by the relay C by means of the contact civ via the head contact hII remains after the head contact has been switched during the current surge, row in the circuit CIh wolh SIE, S (II), g72 2, -.

The pulsed short circuit across the contacts vvi and av cannot cause the relay S to drop out during the surge transmission. After the end of the series of impulses, the relay S drops out because it remains short-circuited via the contacts vvI and av. The further series of current impulses used to set the line selector therefore now acts on the rotary magnet D. The rotary magnet receives the current pulses in the following circuit: +, iLII, aII, SII, .UI, pII, kI, D, -.

During this series of impulses, even after the circuit for relay h (winding I) has been opened, the excitation of relay V via winding II in the circuit +, CVI VII aIiI V (II), - maintain. The drop-out delay of the relay Z 'bridges the brief opening of the circuit through the contact aIII. After the end of the second series of impulses, the relay LT drops out. This closes the following test circuit: +, cvi, vII, P (I), P (II), c-arm of the LW, ci (Ab-b. I), LW i, d-arm of the VW, riii, -.

In this circuit, the relay P responds and switches with his Contact pIII. The relay U via winding I. The relay U responds, blocks with its contact uvi and switches the speech wires with its contacts u111 and uIV through to the participant. The contact ul switches the occupancy circuit of the relay C on winding II of this relay U, which is connected in series via contacts pII and kI with the rotary magnet.

After the voice wires have been switched through, the following circuit is closed for the relay T of the selected subscriber: - (Fig. I), T (I), rI, b-arm of the VW, bi,) -arm of the LW, uIv, b -Arm of I. GW, pIV, rI, R (I), t11, c I v, +.

In this circuit, the relay T of the preselector responds, which, with its contact tII, switches on winding II and winding II of relay R in the test circuit running from the line selector. As a result, the relay R responds, with its contact rI the winding I of the relay T of. the b-core switches off. The connection of the negative potential to the b-core connected from the I. GW to the subscriber is therefore only brief. However, it is sufficient to bring the relay R of the I. GW to respond in the aforementioned circuit of the relay T, which switches with its contact ril a holding winding parallel to the relays U and C of the occupancy circuit of the 1st GW. The contact rv interrupts the circuit for the relay T (II) in the I. GW, so that this relay comes to waste. However, before the relay T drops out, the relay A i responds in the circuit +, U (III), tlv, yvI, A i, - . Contact a iI closes the following ringing circuit: a Ii, CI (III), ZLV, tI, c III, p11, a-arm of the I. GTV, uIII (Fig. Q.), A-arm of the LW, tI (Fig. I), subscriber loop, tIII, b-arm of the LW, icIV, b-arm of the I. GW, pIV, r1, tIII, tII, c iv, +.

This is how the first call comes to the subscriber. After the waste Relay A i, whose circuit is separated again by the contact tIv, is the ringing current is switched to the 7-sec. call by means of contact a II, so that the participant is appointed periodically. If the @ ei.lnehmer reports, so the relay C i responds in the ringing circuit, which is via its winding II as well as via the contact ui and the resistor Wi 2- puts in a holding circuit. The contact c iii switches through the a-wire. The feeding of the called subscriber takes place via windings I and 1I of relay A i.

The triggering processes take place briefly in the following way: If the calling subscriber hangs up first, relay A drops out, whereby relay C is short-circuited. Since the test circuit of the I. GW is also separated by the contact cv, the relay U in the LW drops out, which in turn controls the. Disconnects the test circuit to the participant, which unlocks the participant. If, on the other hand, the called subscriber hangs up first, then the I. GW What relay A i drops out, which short-circuits the relay P with its contact a ivI 'so that it drops out, whereby the test circuit to the line selector is disconnected. The triggering of the I. GW then remains dependent on the calling subscriber.

If, in addition to subscriber lines, connection lines are also connected to the line selector (Fig. 4), the incentive to transmit power does not take place after the test, since in this case the negative potential on the b-wire is missing. The relay R of the I. GW can therefore not respond "so that the switching processes described above, which lead to the transmission of ringing current, are omitted.

Fig.2 shows the arrangement according to the invention for a call seeker. When this AS is occupied by a line selector, the relay T i speaks via the b i wire via its winding I, whereby, by means of the contact t III, the windings II of the relays R i and T i parallel to the resistor Wi3 in the test circuit are switched on. The relay R i responds as a result and switches the b i wire through with its contact r III, so that the winding I of the relay T i is switched off. The brief connection of the negative potential up to the I. GW is also sufficient here to initiate the transmission of ringing current.

By simply switching over,. Use the I. GW shown in Fig. 3 as a line selector. It is only necessary to disconnect the short-circuit strap at: 2 and instead provide a: one at i. This: prevents the relay T from responding after the end of the first series of impulses, so that! the selector cannot be turned in automatically.

The relay C i is much more in the circuit +, cv, woII short-circuit bar i, Wi i, c I Iv, C i (winding II), -The following second series of current impulses for setting the LW arrives in the circuit + aII CvI c il, III rv, kI DI on the rotary solenoid.

Likewise, by simply switching over the L TV in Fig. Q. achieve that this does not work as LLY, but as GW. To do this, remove the short-circuit bars at i and 2 ZU and instead provide short-circuit bars at 3 and 4, since the relay V then drops out after the first series of impulses, but the relay S is in the circuit -I-, elv, short-circuit bar 4, S (III ), remains held. After: The end of the series of impulses, the rotary magnet receives current in the following circuit uII, all, SI vI pII kT D Contact d, of the rotary magnet switches via contact vnI .das. Relay A on, which again interrupts the circuit of the rotary solenoid with its contact 1I. Due to the interplay of the rotary magnet D and the relay A , the voter enters automatically in the relevant decade.

If you make these switchings in Fig. 3 and 4 of decade contacts depending on, one and the same voters can be group and line voters use, so that a versatile exploitation of the voters is achieved, in particular for office expansions and temporary interconnection of several exchanges matters.

Claims (5)

PATENT CLAIMS: i. Circuit configuration for telephone systems with dialer operation, in which the call device is assigned to a connection device upstream of the final dialer, characterized by such a design of the subscriber circuit that when the final selector (LW) is checked for a subscriber line from this an incentive back to the connection device provided with the call device ( I. GW) is transmitted through which .die Rufstromaussendung is initiated. 2. Circuit arrangement according to claim i, characterized in that; marked that the incentive is given briefly for ringing current transmission. 3. Circuit arrangement according to claim i and 2, characterized in that the incentive to transmit ringtone with the help the relay (R, T) of the subscriber circuit is given. 4. Circuit arrangement according to Claims i to 3, characterized in that on one of the speech wires (b-wire) of the multiple field a winding of the subscriber isolating relay (T) is arranged over which the relay responds after switching through the final selector (LW). 5. Circuit arrangement according to claim 4, characterized in; marked that, the over the speech artery of the multiple field responding isolating relay (T) switches on the call relay (R) and communicates with it holds together in the test circuit (c-wire), while the one arranged in the speech wire Winding (I) .by the call relay (R) is switched off by the talking eagle :.