DE563541C - Circuit arrangement for telegraph systems with dialer operation - Google Patents

Description

Circuit arrangement for telegraph systems with voter operation The invention refers to telegraph systems where voters have a connection between two participants can be established. It can now happen that the desired Subscribers or the voters required to establish a connection, or if so the connection goes through several offices, all from one office to another Trunks running out of line are busy. In this case it is with the known ones Systems required that the subscriber can partially set up the connection triggers again and after some time tries again to establish the connection, whereby he must reckon that the connecting devices or lines will turn are occupied. In the case of connections, "-which run over several offices, are also, if the calling subscriber has reached the second or next office, but the voters required to establish the connection in the office reached or the subscriber himself is manned, the connecting lines between the: offices, which are only provided in small numbers, withdrawn from traffic without the desired Connection is established.

The present invention aims to avoid this drawback, and it consists in the fact that, if the number is occupied, the one to produce a desired Connection required connection devices of an office or of the office outgoing lines (connecting lines or subscriber lines) in this office Switching means come into effect, which is produced by the calling subscriber Switch the connection to a telegraph set at this office.

According to the present invention, the subscriber does not need the connection to trigger, but he can give his message to the connected office telephone, whereupon the message as soon as the onward connection line or the desired one Participant line becomes free, is passed on by an officer of the office.

For connections that use two or more connecting lines run, according to the invention, the receiver of the office is switched on, to which the busy connection device belongs or from which the busy line going off. The calling subscriber expediently receives if after switching the Connection all trunk sets are busy, no busy signal, but a waiting signal, as soon as an office telephone becomes free, the dial tone follows, followed by the subscriber's Message can give.

In the drawings, two exemplary embodiments of the invention are shown to the extent that it appears necessary for an understanding of the invention. According to the exemplary embodiment Fig. I, only exchange B can be reached from the calling office A via the connecting line VL, while according to the arrangement shown in Fig A third office can be obtained from office A in addition to office B, or vice versa. To identify whether a connection to a third office or to a subscriber of one of the offices A or B shown is desired, follow-up switching devices MS or 11TS are used in each of the offices A and B.

The arrangement according to Fig. I will now be described in more detail: To establish a connection to a subscriber in office B, the calling subscriber in office A sets the group selector GW in a known manner by dialing the digit required to reach a connection line ITL running to office B. of his office A to the decade in which the connection lines are connected. The group selector GW then searches freely for a free connection line. Assuming that the connection line ITL shown is the first free one, the following excitation circuit for relay C is established: earth in group selector GW, line c, switching arm of the group selector, break contact 4y, winding II of relay C, battery, earth. At the same time, the polarized relay ER is energized via the line a, to which a negative potential is applied by the group selector. The relay C cancels the short circuit on its winding I by moving its contact 2c and puts it in series with the winding II, whereby the connecting line is blocked against other occupancy. The relay ER lays over its contact it i a negative potential to the upper core ar the connecting line ITL, whereby at the incoming end of the connecting line, the polarized relay ER, responsive of the office B. The relay ER, rises above its contact 6 egg, the short across the coil of relay R1 and places the same over the same contact a negative potential to the one end of the winding of the relay R1 and the line a1, but to response of relay R1 is still disconnected. The relay R1 now responds and switches the line a1 through via its contact 7 r1, and via its contact gr, it occupies the selector in which the lines a1 and b1 end. A negative potential is applied from this selector via the line bi, which causes the relay ES to respond and, by switching its contact ioesi, brings the relay X1 to respond and applies a negative potential to the lower wire bv of the connecting line VL, whereby the Relay ES of office A comes into play. The relay ES through its contact 5 it initially removes the short circuit for the relay R, which responds and passes through its contact 3 r the negative potential connected to it via the contact 5 to the line b of the group selector. The calling subscriber receives the dial tone. An excitation circuit for relay Y1 is closed via the make contacts ä r1 and ii x1, which. via its contact 14y1 in a holding circuit independent of contact ii x1. The starting circuit for the call seeker AS is prepared via the contact 15y and the circuit for the changeover relay Ui is prepared via the contact 16y1.

If the calling subscriber continues to dial, a positive and a negative potential is switched on alternately to line a. The relay ER alternates its contact i er in the drawn and in the other position and thereby transmits the incoming current surges to the relay ER "which it passes on to the line A1 on lines a1 and bi, and after its setting, the following series of impulses is transmitted in the same way to the following line selector to which the subscriber is connected the lines a1 and b1 reached the group or line selector from the negative potential of the line b1 switched off and instead a positive one switched on. As a result, the polarized relay Es is counter-magnetized, and it switches its contact es, back to the position shown. The relay X1 is short-circuited and broken down t. In addition, the relays ES and R are de-energized, and as a result, the busy signal is transmitted to the calling subscriber.

The starting circuit for the rotary magnet prepared by contact 15Y is closed via contact 13 x1: earth, winding of relay Ani, normally open contact 15Y1, normally closed contact 13y1, igul, battery, earth. The starting relay Ani closes its contact room, whereby the relay Cl is activated, which interrupts the starting chain a111 hontai: t 30c running via the relays C, etc. of the other call seekers. Da .. Relay Cl closes the following circuit: earth, normally open contact -21 cl, normally closed contact -26 p1, winding of relay h1, resistance l1% i, battery, earth. The relay K1 responds and through its contact 27 1 "closes the excitation circuit for the rotary magnet Dl, which switches the switching arms of the call seeker AS by one step - and short-circuits the relay h1 via its contact --8 dl. The relay hl drops out and interrupts the circuit for the rotary magnet at contact 27k1, so that it drops out and opens its contact 28 k1. The relay lil now responds again and makes the rotary magnet again respond the switching arms of the call seeker are switched on until the calling connection line l'L is checked. Then the circuit prepared by the Xcntakt 16y1 for the switch relay U1 and the relay P1 of the call seeker AS is closed: Earth. Windings f1 and I of the relay P1, Switching arm of the caller. Line cs, winding of relay Cl, normally closed contact i2x1, normally open contact 16y1, battery, earth. Relay P1 below r breaks through its contact 26p1 the circuit for the rotary magnet Dl finally, so that the switching arms of the call seeker stop on the occupied contact. Through its contact 23p1, the relay P1 short-circuits its high-winding winding II and thereby blocks the connecting line 1'L against being seized by another caller. Furthermore, the relay P, interrupts the circuit for the relay Cl through its contact 22p1. which via its contact 30 cl the starting chain for the relay C. etc. of the other call seekers closes again, so that if another connection line is to be switched on to an office set and this is the circuit for the starting relay An ,, which is triggered by the response of the relay U1 was interrupted at the igirl contact, the relay arranged on the other connecting line is closed again, another free office telephone is switched on. The relay P1 switches through its contacts 24p1 and 25p1 through the lines from the switching arms of the caller 11S to the exchange set STA. Through the contacts 17 rat and i @ ral, the calling connection is switched to the lines as and bs, so that the connection is now interconnected with the exchange telephone STA. By opening the contact 2oie, the circuit running over the line cl to the occupancy relay (not shown) of the following group selector is interrupted and this selector is thereby triggered. The following circuit now comes about for the receiving relay EA of the office telephone: Earth, winding of the relay EA, working contact 25 p1, switching arm of the caller, line as, working contact 17 "" contact 6 er "negative pole of the battery. The relay EA responds and leaves the office telephone, its relay S, not shown, comes into play and a negative potential is applied to the line bs to the relay ES via its contact, which causes it to respond again and, as a result, the relays k1, ES and R to respond again The time during which the calling subscriber is transmitted until the switchover - the busy signal - is so short and the telegraph set of the calling subscriber is so designed that the telegraph set during this short time the transmission of the busy signal is not stopped Relay X1, the circuit for relay U1 is switched over in such a way that it runs to the battery via normally open contacts 12x1 and 19u1. The relay U1 is designed with an armature dropout delay so that it remains energized during this switchover.

The calling subscriber now sends out his message, which was sent by the Relay Er- and Ei-, via the circuit described above to the receiving relay EA of the official apparatus is transmitted, from where the message is transmitted by an officer is passed on as soon as the desired subscriber line is free.

When the connection is triggered by the calling subscriber, the group selector GW applies a positive potential to line a, whereby the polarized relay ER is counter-magnetized and its contact i er shifts to the position shown and a positive potential for geomagnetization of the relay ER , to wire a1 of the connecting line VL anchalel et. Ier the Kontakt6erl in the tagged Ü Neten position, the relay R1 is short-circuited and a positive potential to line as receiving the polarized relay EA turned on, the Official apparatus. The office machine is shut down and the contact is moved to the position shown. As a result, a positive potential is applied to the relay ES via the line bs, which moves its contact ioesl into the position shown and thereby short-circuits the relay X1 and brings about the counter-magnetization of the relay ES, which short-circuits the relay R via its contact 5 and a positive potential is applied to the line b of the group selector GW, whereby the triggering of the group selector is initiated. When relay R1 drops out, the circuit for relay Y1 has been interrupted, so that it drops out. If now, after the de-energization of the relay X1, it moves its contact 12x1 back into the position shown, no new circuit is closed for the relay U1, since the contact 16y1 is open. As a result, relay U1 drops out. At the same time, the circuit for the relay P1 of the caller AS is interrupted. This enables the call finder for the next call.

Let us now describe the embodiment according to Figure 2: As already mentioned above, connections can be made in both directions via the connecting line VL, i.e. both from A to B and from B to A. The facilities of office A agree with them of Office B and are therefore only distinguished from one another in their designation by the appended index i or 2. To explain the invention, it is sufficient to describe the traffic in one direction, and it is assumed that the connection to be established runs from left to right. There is now the possibility that from office A a participant of office B is desired or that a participant of office A tries to reach a participant of a third office (not shown) beyond office B.

Let us first consider the first case: In the lower part of the drawing, the group selector GW is indicated, via which a subscriber from office A can seize the connection line to office B. When the group selector GWl checks the connection line VL shown, the following circuit is established: Earth, normally closed contact 19z-1, i cl, winding I of relay Cl, normally closed contact 32 f1, line cgl, switching arm of the group selector to battery. The relay Cl responds, removes the short circuit via its winding II through its contact i cl and puts it in series with winding I, whereby the connection line is blocked in a known manner against other seizure from this end. The relay Cl closes an excitation circuit for the relay X1 through its contact 3 cl. The relay X1 opens its contact 6x1 in order to prevent the rotary magnet Dl of the tracking switching mechanism MS from being influenced during the current impulse delivery described below. The relay X1 also opens its contact 5 x1 and thereby prevents an occupation of the connection line VZ belonging to the lines a1 and. b1 connected group voter of the own office. The line agl is only switched through to the relay EAl via the working contacts 9 x1 and 2 cl, and the polarized relay EAl is excited by a negative potential applied by the group selector GWl. Via the contact ii eal, a negative potential is switched on to the polarized relay ES, of the office B via the connecting line TL, whereby this relay is energized and via its contact 12 it = brings the polarized relays A2 and EB2 to respond. The relay EB2 cancels the short circuit via the relay R2 through its contact 13 eb_ and at the same time thereby closes an excitation circuit for this relay. The relay R responds and prevents by opening its contact 191-2 in the circuit for the occupancy relay C2 an occupation of the connection line VL by a subscriber in the office B. Furthermore, the relay R2 brings the occupancy relay of the selector via its contact 15 r2, in which the wires 2 a and 2 b terminate, to respond. A negative potential is applied to line a2 via contact 14r2 and contact 13 eb, as a result of which the receiving relay of this selector is energized, which applies a negative potential to line b2. As a result, the polarized relay ER located in the line b2 is made to respond and is connected to earth via the normally closed contact 46x2. The relay S2 has been excited via the following path: earth, normally open contact 18r2, winding I of relay S2, rest position and switching arm III of the tracking switch mechanism MS "normally closed contact 10x2, battery, earth. A holding circuit for relay S2 is via contacts 48s2 and 2o r2 Its winding II has been closed. The relay ER2 cancels through its contact 4o er, the short circuit via the relay M2 and causes this relay to respond. The excitation circuit for the relay o2 is now closed by the contact 34m2, which is via its contact 4102 the relay EA2 with the through contact he 4o. applied negative potential in connection brings. the relay EA2 is energized and laid down over its contact ii eaz a negative potential to the connecting line to the relay ES, to responsive and its contact 12 it , the relays A1 and EBl to respond. By contact 13 ebl, the short-circuit via relay R1 is canceled, and after this relay via dens The same contact has come to respond, a negative potential is transmitted as a free indicator to the line cg, to the calling subscriber via the work contact i.Irl and the work contact 8 x1. In office B, relay O closes the following excitation circuit for relay I'2: earth, break contact 7x.2, make contacts i7r2, 24o2, winding of relay Y2, battery. Earth. The relay Y2 is placed via its contact 28y2 in a circuit independent of the contact 24o2 and prepares a circuit for the starter relay An .., the calling party AS, and the circuit breaker relay E. at the contact 29y2.

If the subscriber sends out the next series of current impulses to set the selector reached via lines a2 to c2, these current impulses are transmitted to this selector and to the tracking switch JUS by alternately switching the associated contacts of the relays EAl, ES "A, and EB2. The tracking switch: MS. Indicates whether the connection remains within office B or is to be set up to a further office (not shown) of the tracking switch lIS2 can be set to a contact ia.This means that the group selector in which the lines a2 and b2 end, i.e. the first group selector of office B, is set to a decade to which only groups - or line selectors are connected via which no line leading to another exchange can be reached s tracking mechanism on the. Contact it, it is only indicated by the second series of current impulses whether the connection remains in office B or should continue to be established to another office, i. 1i. So, through the first series of impulses, the first group selector of office B is set to a decade to which further group selectors are connected, via which internal connections can be established in certain decades and to which connecting lines to a B-office are connected in other decades . If first a series of impulses. by means of which the tracking switching mechanism is set to a contact n, and a current impulse relay is sent out through which the tracking switching mechanism is switched on to the contact -fr., this is an indication that the connection runs to a further Aint; if, on the other hand, the tracking switch is set to a different contact than yes. is forwarded, the connection remains in the own office. It is assumed that the connection remains in office B, that the tracking switching mechanism is already set to a contact za by the first series of bursts, and that a group and a line selector can be reached via the lines a2 and b2.

The switching of the tracking switching mechanism is accomplished in the following way. If the relay A2 switches its contact 23 a2 back to the position shown on the first selector surge, the relay b'2 is triggered via the following circuit: earth, rest contact 6X2, 31f2, make contact 161; 1st, break contact 23a2, winding I of relay V ., Battery, earth. The relay V2 changes its contact 2i%, and the next time the relay A2 responds, the circuit described above is switched to the rotary magnet D ... The rotary magnet responds and switches the switching arms of the 1t.IS2 tracking mechanism to the next step. Relay Y 2 holds during the series of current impulses, since it is designed with a delay, and contact 2 1 v2 remains closed during the series of current impulses. The contact 22v2 remains open, and this prevents the relay F2 from responding via its winding I while the current is being delivered.

It is assumed that the tracking switching mechanism has been set to contact 2 by two current surges. After the end of the series of impulses, relay V. drops out, and the following circuit is established for relay F2: earth, normally closed contact 7x2, normally open contact 17r2, normally closed contact 22v2, switching arm II of the tracking switching mechanism 1IS2, contact 2, winding I of relay F2, battery, Earth. The relay F2 changes its contact 3 if 2 so that the relay V2 and thus the rotary magnet Dl cannot be re-energized with the next series of current impulses. The group selector reached via lines a2 and b2 has been set by the first series of impulses. The line selector is set to the desired subscriber line by the next series of impulses. It is now assumed that the subscriber line is busy; then the line selector applies a positive potential to line b2 and thereby relays ER. counter-magnetized. The relay ER puts its contact 4o he. to the position shown and short-circuits relay 1bI2 via this contact. At the same time, a positive potential is applied to relay EA2 via normally open contact 4102, so that this relay and consequently also relays ES and EBi are counter-magnetized. As in the first exemplary embodiment, the subscriber receives the busy signal for a short time. In office B, when relay d7 drops out, the circuit of relay 02 at contact 34M2 is interrupted and the lower wire of the connecting line is switched through contact 41 o2 to wire as. To the caller. The following circuit now comes for the starter relay An, of the call seeker AS. made: Battery, switching arm I and contact 2 of the tracking switching mechanism MS !!, normally open contact 29Y2, normally closed contacts 35e2, a6o2, winding of the relay Aal, battery, earth. At the same time, the circuit for the changeover relay E2 is prepared via the normally open contact 29y2 and the normally closed contact 25o2, which is activated as soon as a caller tunes into the busy connection line. The connection of the office set is carried out in the same way as was described in the exemplary embodiment, Fig. I, and then the busy signal to the caller is switched off and the dial tone is transmitted again.

If no external telephone is free, no caller is started and the relay E2 does not respond. However, no busy signal is transmitted to the calling subscriber, since a negative potential is present at relay EA2 via the normally closed contact 37e2, the normally open contact 44y and the normally closed contact 4102. In contrast to the fact that the connection has been switched but no trunk set is free, the name of the subscriber or the office is not returned to the calling subscriber, as is the case when a free trunk set is seized or when a free subscriber's set is seized, but the subscriber also receives no busy signal, which means that the subscriber can tell that the connection has already been switched, but that no external telephone is free. He stays on the phone and waits until an office phone becomes free, that is, until the name of the office is returned. As soon as an exchange telephone becomes free, the assigned caller starts up and the relay E2 is activated. The relay E2 switches through its contacts37 @ - and 38e2 the connection to the office telephone and separates the circuit for the occupancy relay of the following group selector, which is not shown, at contact 36e. Furthermore, the relay E2 at contact 35e2 interrupts the circuit for the starting relay An .. of the caller AS ..

When the connection is triggered, the group selector GWi is triggered and the relays El and X1 drop out with a delay. The relay EAl is counter-magnetized via the normally closed contact 2 cl and the normally open contact 9 x1 of the later falling relay X1 by applying a positive potential, and as a result, ES @, A2 and EB2 and the receiving relay of the office telephone (not shown) and the relays R1, R2 are also used Brought waste. T he circuit for relay Y2 is interrupted at contact 17 r2 and relay Y. drops out. Via the normally open contact 43 f2 and the normally closed contacts 44y2 and 41 0, a positive potential for counter-magnetization of relay EA2 and subsequent counter-magnetization of relay ES " A1 is applied. By opening contact 20r1, relay S2 is de-energized, which via its contact 5iS2 the circuit The circuit for the relay E2 is interrupted at the contact 29y2, the relay E2 drops out, the further switching of the tracking switch MS2 to the idle circuit takes place in the following way: After the contact 5 has been closed, comes The following17 circuit is established: Battery, normally closed contact iox2, switching arm III and contact segment of the 1Vlitlaufschaltwerkes, winding II of relays F. and V @, normally closed contact 51 s2, earth. Relays F2 and h2 respond and the following circuit is closed for rotary magnet D2 : Earth, normally closed contact 6x2, normally open contacts 3 if 2, 2 i v2, windings of the rotary solenoid D2, battery, E rde. The rotary magnet short-circuits the relay V2 through its contact d2, which then drops out and interrupts the circuit for the rotary magnet D2 at contact 2 "v2. The rotary magnet D2 removes the short circuit via the winding II of the relay V2 again through its contact d2, see above that the relay L'2 responds again and closes the circuit for the rotary magnet D2. This is repeated until the tracking switch-IhIS2 is in the rest position, where the circuit for the relays F2 and V2 is interrupted.

Let us now consider the case that a connection to a third Office is established. The tracking mechanism is therefore first on contact n, and then set to contact n2. It can now happen that in the Setting of the first group voter of office B to one corresponding to the contact zal Decade none of the following voters connected to this decade is free, or that after setting the second group voter of Office B to one of the Contact zag corresponding decade none of the connection lines connected to this decade is free for the third office.

In both cases, the relevant selector applies a positive potential to the line hl and thereby counter-magnetizes the relay ER . The relay ER., Shorts the relay 1I., Which drops out and, through its contact i6irz ", interrupts the circuit for the rotary magnet D. of the 1-run switch mechanism JUS n., was selected, but no connection line is free, on the last turning step of the second group selector a relay G, not shown, is energized, which closes the starting circuit for the call seeker AS2 through its hontaktä @. Since the Iy @ -mtaht b = is only closed , if no free connection line to the third office is checked, if a ° free connection line has been found and a voter or a line of the third office is busy, the connection of the office telephone of office D is prevented. A third office is also through Number current impulses arranged tracking switchgear, which in the same way as the llitlaufschaltwerk JUS The office telephone of the third office switches when a voter or a line of this office is occupied.

The tracking mechanism can also be wired in a different way. For example, the tracking switching mechanism can also be used when setting a group selector on a decade init outgoing connection lines switched to an Iiontalct zzl «-Ground, and then through the surge series. through which the tracking mechanism .11S., To which the contact tt @ is switched, already a selector and the tracking switching mechanism of the third office, and the connection via contact ä2 with your Contact.2c9 y. then falls away because when setting the rear derailleur to the Contact it., The connection is already in the other office. There is then no switchover take place more in office B. Of course, several can make contact with -14l corresponding contacts be arranged in the contact bank of the tracking switchgear, as much as a series of current impulses to reach a connecting line to the third office are required. For every contact, yes, the connection can be made to the The office apparatus can be switched over if the voters connected to the decade or Connection lines are busy.

Claims (3)

YATENTAYSPRÜCHR: z. Circuit arrangement for telegraph systems with voter operation, characterized in that in the case of Besetzts-.in the voter of an office (D) required to establish a connection or the desired line (connecting line or subscriber line) going out from the office (B) in this office (B) switching means (Relay UI, Fig. R, or Relay E2, Fig. Z) come into effect, which switch the connection established by the calling subscriber to a telegraph receiver (relay EA, Fig. I) of the office (B). 2. Circuit arrangement according to claim i for systems in which the connections run across several offices in a row, characterized in that in each of the: lniter switching devices are arranged and the connection to a receiving device (E A) of the last reached Office is switched. 3. Circuit arrangement according to claim 2, characterized in that the switching devices (relay C, '1 in Fig. I, relay El and E., in Fig. A) one at the incoming end of one between two offices (.d and B) running Connecting line (L 'L) arranged current impulse transmitter are assigned. .I. Circuit arrangement according to Claim i, characterized in that a free receiving device (EA) of the office is connected to the calling line (VL) via a selector with free choice (AS in Fig. I, AS, and AS, in Fig. 2). 5. A circuit arrangement according to claim 3 and .I, characterized in that the connection of the voter with free choice to the calling line (l "L) by a free and busy indicator to the calling subscriber transmitting relay (relay ES" Fig. I. ER., Fig. 2). c). Circuit arrangement according to Claim 5, characterized in that the relay (ES, in Fig. I. ER = in Fig. Z) prepares the starting circuit for the voter with free choice when a free connection line is occupied and the voter reached via the connection line or when it is busy Line closes. 7. Circuit arrangement according to claim d., Characterized in that a switching of the connection to the connected office machine making relay (U1 in Fig. I, El and E .. in Fig. A) is arranged in the occupancy circuit of the @ voter with free choice . Circuit arrangement according to claim 2, characterized in that in each office the switching devices i relay E "in office B, Fig. @J are controlled by a switching mechanism (MS as soon as the connection is established via this office (B) to another office.g.Circuit arrangement according to Claim 8, characterized in that the circuit for the starting relay (An ..) of the selector with free choice (AS,) and the Changeover relay (E.) is only closed via contacts (n,; il) of the tracking switching mechanism (117S) in the positions which characterize connections within the office to which the tracking switching mechanism is assigned the tracking switch (MS2) identifies a connection to another office when a group selector is set to one decade with outgoing connection lines to another office nenden contact (ya,) is set and this contact is set when all the connecting lines of the decade are busy by a switching device (contact g,) operated on the last turn of the selector with the starter relay (An,) of the dialer switching on a free office telephone with free choice (AS .,) and the changeover relay (E,) is connected. i i. Circuit arrangement according to Claim 4, characterized in that, when all the office sets are busy, the subscriber is sent a character which indicates to him that he can wait for an office set to become free. 12. Circuit arrangement according to claim zo, characterized in that when an office machine becomes free by the changeover relay (E2, Fig. 2), the subscriber is shown the connection of a free office machine.