DE696799C - Circuit arrangement for the delivery of impulses to identify the subscriber initiating a connection in a company line - Google Patents

Description

Circuit arrangement for the delivery of current surges to identify the a connection of initiating party line management The invention relates to a circuit arrangement for company lines in telecommunication, in particular Telephone systems.

The aim of the invention is to provide a marking in such systems of a calling subscriber in an exchange accessible to the common line to effect in a simple and safe manner.

There are already arrangements known in which when a Connection from a subscriber station identification current surges are sent out. In these arrangements, the handset hook is in a certain way with the number shard coupled, so that when you pick up the handset, a characterizing the calling station Current impulse series is sent out. However, this solution requires complicated construction Changes to the participant sets.

There are also arrangements known in -den when initiating a Connection from the calling party. Incentive to that of the company management associated central control unit is sent; whereupon from this so long electric surges be sent out; until the switching devices at the. Branch = places the the have reached the switch position assigned to the calling station. At the same time a follow-up drive in the central station on the one assigned to the calling station Contact discontinued. ' However, this arrangement has the disadvantage of all with central Control center working systems, which consists in @ that in the event of faults in the central Control station the entire system is shut down.

It has also already been proposed to transmit the series of identification currents . on the part of the calling branch point, the branch points for selection when arriving Connections to use dialing mechanism, such; that this at initiation a connection from a certain starting position by switching by a different number of steps corresponding to the calling branch point brought into the call position assigned to the station and thereby the calling one Junction point characterizing current impulse series is sent out. This arrangement leaves can only be used in systems that have a direct influence on the surge receiving devices of the branch points by the branch sent by the calling branch Current surges is prevented, which in the proposed arrangement by different Types of power surges in both directions the company line is achieved. The invention is the Use of the dialing mechanism as a current impulse transmitter; which, when a connection is initiated, is the one that characterizes the calling branch Series of current impulses via the company line to the exchange transfer: gen, also possible then; if in both Rich @ -tungen over - the company management dis- 'same type of electrical surge is sent. The result is a more general one Scope of the invention.

The invention consists in that at Einleiturig a connection the voting facilities at all branches of the company management to be more individual, automatic switching from a rest position assumed when the system is idle into a number of effective steps that varies depending on the calling branch attainable starting position from which the switching mechanisms by the desired Branch point identifying numbered current impulse series in the one assigned to this branch point Call position are brought; can be switched: and: switching means in the Junction points for the emission of the identification current surge series during the automatic Only allow the dialing mechanisms to be set at the calling junction.

The identification currents affect in one of the company management accessible switching center devices which are used to determine from which branch of the company management the initiation of a connection has taken place; for example to use the counter assigned to this position for the purpose of counting calls to turn on.

The basic concept of the invention is based on the schematic representations i and 2 can be seen, while a complete embodiment in Fig.3 is shown.

In Fig. I and 2 there are several branch points on the common line GL TSt, VSt: According to FIG. I, all switching mechanisms are different when the system is idle set: on the contacts - i; - z etc. When initiating a connection so many current surges are emitted by the calling station; like the rear derailleur this point needs to be taken from the position assumed in the idle state of the system to get to the starting position. These surges cause the setting of a Switching mechanism (identification selector Dk) in the exchange; whereby the, circuit of the identification relay assigned to the calling subscriber (e.g. counter) will.

In arrangements according to FIG. 2; those with .denen in their general structure correspond to Fig: i, all switchgear are equivalent when the system is idle: When initiating a connection, the switching, verke in one of the optional Call enabling initial position A transferred, "whereby from the calling station as a result of the arrangement of spaces, so much @: pious thrusts are also sent out will correspond to the marking of this point.

In Fig.3 is the application of the inventive idea to a complete Embodiment shown. It is a company management GL; to which dial-up call-off points are connected that have a Exchange VSt connection option to other exchange facilities, e.g. have to a self-connection exchange. The switching center is shown on the drawing VSt and one of the subscriber stations TStß, which are basically the same in their structure shown. The branch offices of the company management are for the purpose of sealing off by Zlbertrager Ue. the common line connected to an application Such systems also in high voltage affected or thunderstorms. Areas to enable. The election is made by the party making the election -, directly (i.e. without common control device) by inductively transmitted direct current surges, which have an effect on polarized receiving relays and the switching of as step switches instruct trained voting facilities. The numbering of the branch points is such that with internal connections (connections between two participants of the same company management) only the last number of the code number (e.g. at the Number 8743 just 3) needs to be dialed. When connected is the conversation is kept secret; Intrusion on the busy line is therefore not possible, but indicators are provided at the junction points, 'which show the busy status of the line.

The polarized receiving relays are in the idle state of the system P at all branch points in the rest position: The switching units are, however, at all Junction points set differently according to der'Erfindüng; namely is located every rear derailleur by so many steps ahead of through the construction of the rear derailleur defined zero setting, as it is the internal call number of this branch corresponds to (e.g. with subscriber ä7 ¢ 3 three steps before the zero setting).

A connection is initiated at a subscriber station by lifting the handset. The transmission takes place automatically from this point an occupancy current surge, which at all branch points the individual Transfer of the switchgear from the rest positions assumed in the idle state of the system caused in the zero position. There are power surges from the calling station alone (so-called identification streams) sent via management, which in the switching center accessible to the company management - the switchgear to identify the meter and activate the receiving relays of the other branch points, but not affect their rear derailleurs.

The switching processes that take place in the assignment are as follows: In. The calling station is set up by picking up the handset to create a circuit for the relay N, closed +, rotary arm id on step - n, contacts 2 e, 3 v, Hui, relay N (winding I), -. (In the drawing, the - [potential is always referred to as "earth".) Relay N responds and switches relay S on via contact qn. This causes the transmission of a current impulse on the common line by switching its grain clocks 5 s and 6 s, in the following way: By the response of the relay N, a circuit for the winding II of the voltage-increasing transformer Tr has been formed via -f -, contacts 7 n, 5 s, winding II of Tr, -: The current surge generated on the secondary side of the transformer has not become effective on the company line, because -the contact 8n closes as a follow-up contact only after the one on the secondary side in the winding 11: I of the transformer 7r generated current surge across the resistor Wil. has already subsided. If the relay S triggers the switching of the contacts 5 s and 6 s in the never working position, the existing circuit via winding II of the transformer is opened, but the circuit is opened. closed via the winding I of the transformer Tr. Since both windings have opposite winding directions, a particularly powerful current surge consisting of four successive switching-off and switching-on currents occurs on the secondary side of the transformer, which, since contact 8 n is closed, reaches the company line. The circuit of winding I of the transformer runs through - [-, contacts 7 n, g v; io d, 6 s, winding I of Tr; -. In addition to the secondary winding III of the transformer, the generated current surge is also effective in the winding IV and influenced via the contact ri n the polarized relay P assigned to the calling point; which is transferred from its rest to the working position. The same takes place under the influence of the occupancy current surge sent to the company line via the protective transformer Ue and contact 8 n at all other junction points of the common line at which this current surge - via the protective transformer Ue and via the idle contact i 1 n to the polarized relay P acts: By moving the polarized relay into the working position, the contact 12p is closed, creating a circuit for the relay L; F and the indicator SZ comes about +, contact 12p, relay B (winding I), relay F, resistor Wie, - or indicator SZ, -. By opening the contact 13f the short circuit of the relay C is canceled, so that this relay also responds -I-, contact i2p, relay B '(winding I), relay C, resistor Wis, -. This relay forms a holding circuit via its contact 14c, whereby the winding I of the relay B is short-circuited. The Re- °. However, lais B still holds on to its second winding and the contact 15d actuated when transferring the switching mechanism D in the following circuits - +,> contacts 1q.c, r5 d, 16v, relay B (winding-II), resistor Wie, -; until the switching mechanism at this point has reached the zero position: The switching mechanism is brought into the zero position in the following way: When relay C responds, a circuit has been established for relay R +, rotating arm-1 d in position -n , Contacts 17 f, i8 c, ig f; 2o d, relay R (Wicl -, - Jung I), -. Relay R responds and switches the rotary magnet D in parallel via contact zi r; this is excited in the same circuit as relay R, responds and opens contact 2o d, which switches off relay R. At the same time, however, the rotary arm id is moved one step further so that the excitation circuit for the rotary magnet runs as follows +, rotary arm id, contact ( -n f, 21r, rotary magnet D, -. Since the relay R drops out as a result of the interruption of its circuit, the circuit of the rotary magnet D is interrupted by switching the contact 21 r; As a result, contact 2o d returns to the rest position and in turn closes the circuit for relay R (winding I). This responds in turn, and the beautifully described process is now repeated: rotary magnet D responds again, switches off relay R, etc., i.e. h: Relay R and rotary magnet D work in a self-interrupting circuit until the switching mechanism reaches the zero position in which the circuit for both magnets is interrupted as a result of contact i9 f in the working position. The switching mechanism of the calling station is therefore in the zero position. The: switching devices of the other branch points of the common line reach the zero position in the same way after they are stimulated to move further by the occupancy current surge; but a little earlier or later, because you have to cover different paths from the individual rest position (-n) to the zero position: From the calling point, when the switching mechanism is transferred to the zero position, so many current surges are sent to the common line: like that Switching mechanism makes steps to get to the zero position: The pulse is generated by the contact zod, which is designed as a drag contact and, since the relays N and S, are still energized; alternately switches the windings I and II of the transformer on and off +, contacts 7 1z, 9v, zo d, winding II from 7'r or contact 6s, winding I from Tr, -. These current surges generated in the secondary winding and transmitted to the company line are picked up by the receiving relays P of the other subscriber stations, but are ineffective at the other subscriber stations, since the contacts 12 p and 22 p that are actuated are short-circuited via contact 14c: The switchgear on The other stations are therefore not affected by these power surges. On the other hand, the switching mechanisms of the rest. Junction points do not emit current impulses when their switching mechanisms are transferred to the zero position, since the relay N is not energized at any of these "points, so neither the current impulse transmitter Tr is connected to the common line via contact 8n nor the current circuit containing the impulse sender contact io d via contact» 7'z is closed. However, as will be explained later, the current impulses emitted by the calling station are received at the exchange VSt and passed to a switching mechanism which characterizes the counter of the calling station.

If a switching mechanism has reached its zero position at a branch point, the relay B, which was previously held via its winding II, is de-energized by keeping contact 1 5 d open all the time. When the switching mechanism is in the zero position, a circuit is established for relay V +, - rotary arm id on contact o, contact 23 f, relay h (winding I); -. Relay V responds and opens contact 3 v, whereby the holding circuit for relay N is interrupted in the calling branch point. The relay S, which is switched on in parallel with relay N, remains in the following circuits via its winding II, contact 14 c, relay S (winding II), resistor Wi4, contact 24s; -. The relay S remains energized until the switching mechanism returns to the rest position. Furthermore, by moving the contact 9 v, the dial pulse contact 26nsi is switched on to the impulse transformer in place of the contact = od.

As will be explained in more detail later, the exchange a buzzer switched on to the company management, as a sign, the calling sat Participant can start dialing numbers. Let it be an internal connection first, d. H. a connection to a participant of the same company management. As already explained at the beginning, only the choice of the last number is required The code of the desired participant is required.

The calling subscriber pulls his dial up to the number of the subscriber to be called; this again energizes relay N -j-, contact 25 nsa, relay N - (winding II); Contact 24s, -: Relay N responds and prepares by closing its contacts7 around 8n the transmission of the elective current impulses. When the dial expires, the pulse pulses 26 nsi are sent out +., Contacts 7 n, 9 v, 26 nsi, winding II from Tr or contact 6 s, winding I from Tr, -, the dialing pulses, which per number consist of a current surge that occurs when winding I is switched off and winding II is switched on from Tr and an oppositely directed current surge that arises when winding II is switched off and winding I 'is switched on ) the polarized relays P, which are alternately brought into the rest position and then back into the working position according to the two differently directed current impulses sent per number. As a result, the switching mechanisms -E-, contacts 22p,: 27c, 28v; Rotary arm 29d on contact segment i to 9, contact 3o b, rotary magnet D, -: -The circuit of relay V which is interrupted after leaving the zero position is maintained in the following way - [-, normally open contact 3 i d-, contact 32v, relay V ( Winding II), -. The relay V drops out at all branch points only after the end of the selective current impulse series. If, for example, station 6 is called, all switching mechanisms are on contact step 6 after the selection has ended. At the selected junction, the call circuit is established after relay V has dropped -f-, rotary arm id on contact 6, X "ontacts 33 f, 34v, hook switch 1-1L4 in the rest position, relay R (winding II), Kaitakt 35 s, -. The relay R responds and switches on the alarm clock via its contact 36r S a circuit, prepared, which is closed when the receiver is picked up via the hook switch contact HU.

If the called subscriber answers by lifting his handset, so his alarm clock is switched off, but at the same time a power surge (back pulse), which identifies the reporting of the participant, automatically from this point sent out. This return pulse causes the activation of the when the Connection in the exchange. Prepared counter of the calling station.

The formwork operations are described in detail as follows: When reporting of the called subscriber, the prepared circuit for the relay S is closed +, rotary arm 1 d f to contact 6, contactor 33, 34v, 36r, HU3, relay S (winding I) -. The relay S responds and, by opening the contact 35 s, interrupts the circuit of the alarm clock Wh and the winding II of the relay R. Relaus R does not drop out, as will be explained later, so that a circuit for the. Relay N comes about- -i-, contact 37r, relay N (winding II), contact 24s, -. That. Relay N responds and prepares the transmission of the return pulse from the called station. A current surge is not yet sent to the company line when relay N responds, since, as already explained at the beginning, the contacts of relay N are designed as follow-up contacts, so that contact & n is only closed when the contact is closed 7 n caused current impulse on the secondary side of Tr has already subsided. The transmission of the return pulse is only initiated by the switchgear of the called station. When picking up this handset, a circuit for the rotary magnet and in parallel for the relay R (winding I) was closed -f-, rotary arm 1d on contact 6, contacts 33f, 34v, 36r, HUs, 4K , HUv 3v, 38s, contacts-33f, i8e, igf, 21y, rotary solenoid D or relay R (winding I), -The rotary solenoid responds and moves the switching mechanism of the called station by one step (on contact 7). The contact 1o d is temporarily turned over and causes the return pulse to be transmitted -, contacts 7 n; 9v, io d, winding II of Tr or contact 6 s, winding I of Tr. This return pulse from the called station influences the receiving relays at all branch points, but without adjusting the switching mechanisms at these points, Ida is interrupted after the relay V has dropped by switching the contact 28 v of the Förtschaltestromkre: is. Only in the exchange, as will be explained below; the counter is switched on by this return pulse.

At the called station, the switching mechanism is scolded by one step - the circuit for the rotary magnet D and the relay R is interrupted. Thus, by opening the contact 37r , the relay N is also switched off again. The speech device of the called station is switched on via the contact iin in the rest position and the contact 39 s in the working position. The conversation between both participants can therefore begin.

At the end of the conversation, the connection @ is triggered by the subscriber who first attaches his or her handset. If the second participant does not hang up, this has no effect on the release of the connection. Rather, the subscriber is blocked until he hangs up his phone; however, the line itself becomes free for other connections. Under the influence of the triggering stimulus, the switching mechanisms at all branch points run automatically into the individual rest positions. The switching processes are as follows: When you hang up the handset, relay N is re-energized at the branch point that triggered the release +, HU4, relay N (winding II), contact 24s, -. Relay N responds and sohliess the winding II of the relay S kure, so that this relay drops out. This causes the transmission of a current impulse on the common line via the contacts 5 s and 6 s (by switching off winding I and switching on winding II of Tr) through which the polar: isiegten receiving relay at all branch points and also at the Triggering the initiating position from the working position assumed up to then: be brought into the rest position, By moving the contact 22 p, the contacts 27e; 28v; 16 b causes the short circuit of the relay F; Relay F drops out and short-circuits relay C via its contact 13f; so @ that this is also brought to the rest position. Now there is another circuit for the relay P z.ustende + ,. Rotary arm id (on contact 7 at the called subscriber station 6, on contact 6 at all other branch points), contacts 19 f, 18 c, 2o d; Relay R (winding I), -. At the same time, relay V (winding I) is also energized. By moving the contact 2i r, the rotary magnet D is switched on parallel to the winding I of the relay R; so that the rear derailleur is moved one step further. The circuit of the relay R is interrupted by opening the contact 2ö d; this drops out and interrupts the circuit of the rotary magnet by opening the contact 2i r: This creates another circuit for the relay R, ie. Relay R and rotary magnet D work in a self-interrupting circuit until the rotary arm reaches the position -n, in which the excitation circuit for these two magnets is interrupted. Then relay V also drops out.

The processes are the same at all branch points; In other words, the switching mechanisms begin to run under the influence of the tripping current I and interrupt it as soon as they have reached the - n position; the j a, as described at the beginning, is at each branch point by as many steps before the zero setting as it corresponds to the internal call number. The relay V also drops when the. Position - n off, so that finally all switching devices at all branch points are transferred to the rest position.

The switching center VSt, like the other branch points of the common line, is connected to the common line via a transformer Uev. By emitted at initiation of a connection strip surge If the receiving relay polaresierte Pv via contact 4i m from the rest position into the working position überführt.- This comes about 42 .Contact pv a circuit for the relay G -f- state; Contact 4ä pv in the working position, rotary arm 43 dm in the zero position, rotary arm 44dk in the zero position, relay G, resistance WiS, -: The relay G responds and holds itself through its contact 45g. "At the same time, a circuit for the delay relay W is closed via contact 54g +, contacts 5 4 g, 5 5 t, rotary arm 5 6 dm in the neutral position, contact 57x, relay W (winding I), -.

The identification current impulses sent out by the calling station after seizure (in the number of the calling number of the calling station) bring the receiving relay Pv into the idle position and into the working position. As a result, the rotary magnet Dk is incremented until, at the end of the series of impulses, its rotary arm is set to the counter Z assigned to the calling point. The circuit for the rotary magnet Dk runs via - [-, contacts 42 pv; 46 g, 47 q, - rotary arm q: 8 dk in position o, relay K (winding II find I), rotary magnet Dk, -. Speaks in -diesem circuits in addition to the rotary magnet, the relay K ajuch and causes by closing its contact 49k short-circuiting of its winding II: (The further energization of the rotary magnet Dk therefore the still located in the rest position of the rotary arm 5 NC cdma and the contact 49 k . : Relay K remains energized via its winding I. When the series of identification currents is over, the circuit of relay K is finally interrupted by the contact 42 pv remaining in the working position, so that it drops out. the working position is still switched on -f-, contact 42 pv, rotary arm 43 dm in the zero position, rotary arm 441k on contact segment i to 9, throttle Dri, contacts 5 rg, 52t; 53Y, buzzer Sit, i26 h, . +: This buzzer signal is transmitted to the common line via throttle Dr, as an indicator for the calling subscriber that he can start dialing.

The dialing current pulses now sent out by the calling station no longer act on the rotary magnet Dk in the exchange; but on the idle switch Dm on +, contacts 42 pv; 46.g ;: 47q, rotating arm 48 k on contact segment i Abis 9, contacts 58k, 59w, relay W (winding III), Urehrnaagnet Dm; -. This tracking mechanism has no special functions for internal connections; how it works with outgoing trunk connections will be explained later. The relay W, which is in series with the rotary magnet Dm and is excited by the elective current impulses, drops out again after the end of the selective current impulse series; The switching devices in the exchange are now in a state in which a further current impulse, which is sent over the common line after the end of the selection current impulse series, causes the counter to be switched on. The so-called return pulse sent out when the called subscriber reports is used for this purpose. This return pulse has the same effect as described for the other branch points; a temporary switching of the receiving relay into the rest position and thus the switching on of the relay E via -I-, contacts 42 pv, 46 g, 47 q, rotary arm 48 dk on segment z to 9, contacts 58 k, 59 w, relay E ( Winding I), -. This relay responds and forms a holding circuit -f-, contact 42 Pv, after switching the contact 42 pv into the working position via its winding II; Rotary arm 43 dm on contact segment i to 9, contacts 6o e; 61k, relay E (winding II), -. At the same time, the circuit for the counter assigned to the calling station comes into being - (., Contact 4a pv, rotary arm 43dm on contact segment i to 9, contacts 6o e, 62h, counter Zn of the calling station, rotary arm 63 dk on contact n, contacts 64 h , 65.g resistance WiQ, -. In parallel with relay E, relay K is still energized, which opens the circuit of relay E by opening contact 6 1 k. This also opens contact 6o e, so that the Circuits of the relay K and the counter Z are interrupted again.

Since, as explained above; -the first after the end of the polling series over (the power surge sent by the company management, the activation of the meter caused, switching means are initially provided at Aden, which at the calling point the emission of further current surges, e.g. B. by chance Operating the dial; impede. Ice falls after the end of the Internal selection of the relay N, so that the transmission of power surges to the company line, even if the dial is operated, it is impossible because the contacts-7n and 8 n are open.

Furthermore, arrangements are also provided in the exchange, which prevent a call counting if the connection established before the Reporting of the called party is triggered. Under the action of a tripping current surge if relay Pv comes to rest just like with a return pulse, so that Relay E responds, because when triggered: the connection but relay Pv in its If the rest position remains, the circuit prepared via contact 6o e for the counter not be closed. Incorrect counts when a connection is released prematurely are therefore avoided.

The processes when a connection is released are as follows: After the 'connection' has been terminated, the switching devices in the Switching center transferred to the idle state. Due to the triggering current surge, the receiving relay Pv initially moves into the rest position. - There is therefore another circuit for the relay .E - [, contacts 4z pv, 469, 47q, rotary arm 48 dk on contact segment i to 9, contacts 58k, 59w, relay E (Wiekhing I), -. By closing the contact 66 e, the relay G is short-circuited via the contacts 67 k and 68 a, so that it opens its contact 45 9. Furthermore, the contact 69 g is transferred to the rest position, so that a circuit is established for the relay X +, contacts 699, 70h, rotary arm 7r dm on contact segment i to zz, contact 72 w; Relay X, -. Relay X responds and closes a circuit for the rotary magnet Dm and the relay W -f-, contacts 749, 75 h, 73 x, relay W (winding II), - or rotary arm 76 dm on contact segment i via its contact 73 x to ii, rotary magnet Dmr, -. By opening the contact 72.w: the holding circuit of the relay X is interrupted so that this relay drops out and by opening its contact 73 x in turn the circuit of the rotary magnet Din and the relay W is interrupted. Relay W thus also drops out and closes the circuit again .des relay X via contact 72 w. Relay X responds again, and the processes already described are repeated; ie RelaIs X works together with relay W in a self-interrupting circuit. This interplay lasts so long at first; until the switching mechanism Dm reaches the rest position in which the rotary arm 76 dm leaves the contact segment i to ii and thus interrupts the circuit for Dm.

The relays W and X, however, continue to work in Sel, bstinterrupter circuit; the circuit for relay X now runs via +, contacts 69g; loh, rotary arm 7i dm in zero position, rotary arm 8o d on contact segment i to ii, contact 72 w, relay X, -. Depending on contact 73x , however, instead of the rotary solenoid Dm, the rotary solenoid Dk is switched onwards, so that this switching mechanism too: the rest position extended -E-; Contacts 7q.9; 75h, 73x, rotating arm 76 dm in the zero position, relay K (winding II and I), rotating magnet Dk, -. If the switchgear Dla reaches: position ii, -so a circuit for relay U is closed - [-, rotary arm 77 dk. In position zi, contact segment i to 36 of rotary arm 78 da, relay U (winding I), resistor Wie, -. Relay U responds and prepares a circuit for Aden rotary magnet Da via its contact pulse 79ü. If Ida's switching mechanism: Dk reaches the zero position, the circuit of switching mechanism Da is closed - (-, contact 69 g, contact 7o h, rotary arm 7 1 dm in the zero position, rotary arm 8o dk. In the zero position, contacts i 8 iy, 79 u, rotary solenoid Da, -. The return, the. switchgear Dm and Dk therefore now follows a one-time cycle of the switchgear Da, which is carried out to block the company management for a certain period of time against incoming office connections to the ones running in the self-interrupting circuit .. derailleurs at the branch points can: enable secure conversion into their individual rest positions of the switching mechanism, since it uses the relay U in Sel'bstunterbrecherschaltung, ie through the contact 82 since the relay U is short-circuited, which in turn by opening the contact 79 u The rotary solenoids Da switches off, as a result of which the short-circuit of the relay U is canceled again, so that the relay U claims again, etc. If the switching mechanism Da reaches the Zero position, the rotary arm 78 leaves the contact segment i to 36 and finally interrupts the excitation circuit for the relay U :. This means that the switching devices in the exchange are also in the idle state.

To set up an outgoing exchange connection, the calling subscriber has to dial the number io as the code number. As a result, the switchgear at all junction points move into the switch position io, in which they remain set regardless of further series of dialing currents until the connection is triggered: In the exchange, the loop to the exchange is closed, so that the further establishment of the exchange connection as with one normal subscriber. The connection can be released by both the public service participant and the company management participant: The call count is carried out at the end of the connection; in the event that the member of the company is released, the company management will be reassigned immediately after the release, initiated by the agency; to enable correct call counting (time or zone counting). The switching operations in detail are as follows: If the code number io is selected, the -tSchä: ltwerk Dm in, of the exchange, goes to step io; so that a circuit for relay A is formed -; Contact 42 pv in the working position; Rotary arm 43 dm on contact iö; Relay A; -. Relay A responds and closes contact 83a, so that the loop to the office is closed via this contact and contact 84g. In the exchange, the preselector starts up and switches the line to the first group selector, whereupon the calling subscriber receives the official signal: The switchgear Dm and the relay -W are switched off as well as with internal connections after the end of the first series of dialing currents due to the relay W dropping out. The further rows of dialing currents sent out by the calling station therefore only control @Us Aelais, fl, which forwards the current impulses to the office via contact 83 a. The relay E, which via +, Kontal-, te q.2 pw in the rest position; 469, 47q, rotary arm q: 8 dk on contact segment i to 9, contacts 58 k, 59 zv, relay E (winding I), - is energized with each current impulse, bridged during the selection with its contact 85 e, the holding throttle Dr2.

In the other branch points of the common line are: by choice the code number io all switching mechanisms have also been set to contact io; These switching mechanisms are also not influenced by the further series of elective current impulses, since the rotary arm 29d is in position io at all of these points, the switching circuit des - rotary magnet D has interrupted: Da .by .setting the rotary arm z d to Position io the circuit of the relay V via contact 23 f remains closed; is the calling subscriber the transmission of further series of current impulses by means of the dial (over 26ns) possible.

The termination of the connection can be done by the participant of the company management as with an internal connection - by the triggering current surge caused when the receiver is hung up take place. The connection can also be triggered by the subscriber happen, @ because yes, otherwise the company management if the listener does not hang up the company management station could be blocked unnecessarily.

The switching operations are in detail as follows: The triggering current surge sent by the company management participant causes the polarized relay to be switched to the rest position. This interrupts the circuit of relay A in, the exchange; Relay A falls afb and interrupts the loop to the office by opening contact 83 a. The exchange connection is: thus released. In the c-wire of the preselector, however, the relay H is still kept energized, because the counting still has to take place. The relay! V * is switched on in order to prevent the company management from being occupied again during this time. +; Contacts 86 g, 87 h, relay M (winding I), -. Relay M responds and, by closing the follow-up contacts 89m and 228n2, switches the surge transformer Tyv to the company line. Furthermore, relay T (winding I) is switched in parallel to relay: M via contact 88 m. This causes the transmission of an occupancy current surge on the common line by switching off winding II and switching on winding I of Trv +, contacts 89 n2, 90 t, winding II of Trv or. Contact 9i x; Winding I of Trv; - This current surge, which briefly follows the triggering firing surge sent by the triggering point, causes a renewed assignment of the common line, so that the switchgear at the individual branch points; which have just begun their return to the rest position under the influence of the tripping current, can be stopped again by moving the contact 22p into the working position.

The one assigned to the calling station is now in the exchange Counter Zn ready to receive at .the c-wire of the preselector, so that the counting current surges act on it in the following way +, c-line of the preselector, relay H (winding I), contact 92 h, rotary arm 63 dk on contact n, counter Zn of the calling station, Contact 62 h, relay Ta (winding II) in the selection, -. After the count has finished Relay H drops out. The relay H also drops .aib when the connection is released on the part of the public participant. The following switching operations apply therefore for both cases - the release. ' In @ o: lge CSopening of the contact 87 h the relays M and T switched off again. Through: the drop in relay T makes contact go, t brought to the rest position and thereby a trigger current surge on the common Line. Sent, in the nicely described manner at all junction points causes the final transfer of the switching mechanisms to the rest position.

With incoming exchange connections, the line selector in the exchange is set to the contact assigned to the station to be called. For incoming exchange calls, the line selector is set to the contact assigned to the station to be called; For each branch of the company management, a special connection is provided on the line selector. However, only the c-lines of the line selector are continued as individual lines, while both all a-lines for themselves and all b-lines for themselves are combined to form a common double line a, b. By setting the line selector to a subscriber of the company management, an occupancy current surge is sent out by the switching center of the company management, which blocks the company management for other connections. At the same time, a switching mechanism provided in the exchange is started, which checks the contacts of the line selector and thereby causes the emission of as many dialing current surges as it has to take steps to reach the occupied line selector contact. The release of the connection can be done by the public office subscriber or the subscriber of the company line, as with outgoing exchange connections: The switching processes are as follows: When the line selector is checked on the company line, the "R-elais Q is switched on +, c-wire from the line selector, resistor Wic, contacts 93y; 94u, relay Q, contact 95 g; rotary arm 63 dk -in der, zero position, rotary arm 96 da in the zero position, relay Tca (winding III) in the preselector, c-arm of the preselector, contact 92 h, relay Ta (windings I. And II) in the preselector, -. Relay Q responds and activates relay NI via contact 97 q, contacts 86g, 97q, relay M (winding I), -. Relay M switches the relay via contact 88m T on, so that by turning over the contact 9o t in the manner already described, a seizure current surge is sent from the exchange to the common line Transfer of all polarized receiving relays to the working position and thus the transfer of all switching mechanisms from the individual rest positions to the zero position.

In the exchange, this comes under the influence of the occupancy surge. Relay G in - the nicely described way to respond. This closes a circuit for the rotary magnet Da - +, contacts 69g, 98m, 99q, ioo x; 79u, Drehägnet.Da, -. By moving the contact 86g, the circuit of the winding I of the relay M is opened. Relay M remains, however, due to the response of the rotary magnet Da excited via +, - contacts 102g, 103 m, 104q, iöi da, relay M (winding II), contact 1o5 t, resistance WiB, -. Furthermore, relay X is excited by contact io6da - @ -, contacts 107t, i06 da, 72 w, relay X, -. Relay X responds and interrupts the holding circuit of the rotary magnet Da by opening the contact, so that the magnet is switched off. As a result, contact i06 da is opened and the relay X is switched off, which now drops out and the contact ioox closes again, so that the rotary magnet Da. responds again. The rotary magnet Da and that: Relay X therefore work in a self-interrupting circuit until the rotary arm i08 da checks the occupied c-wire. Before it begins to test the c-wires, the switchgear 'first takes a number of spaces in order to give the switchgear at the branch points of the common line time. to get from the individual rest positions into the zero position. Only then does the switchgear start testing; from this point on, iogda and. the in working position contact iiox current impulses in the number of steps covered by the rotary arm i08 da via the impulse transformer Trv to the. common line sent out. If the switching arm Tob da points to the occupied contact in the LW, the relay U responds to -I- in the line selector, c-wire, rotary arm ro8ja, relay Ü (winding I1), contact iiix; Resistor W19; -. The relay U opens the contact 79 u and thus interrupts the switching circuit of the rotary magnet Da. The selector Da stops, relay X drops out as a result of the opening of contact io6da. By moving the contact 94u, the relay Q, which was switched on when the line selector was activated, is switched off by the line selector, but held in a circuit running in the exchange via contact 112g, resistor Wiio and contact 94u. Furthermore: by. Contact 113 u the relay Y. Switched on +, contacts 11.2 g, i 1 3 u, relay Y, -. Relay Y responds and remains independent of relay U via contact 114y; it continues to last over. Contact 129y closed the circuit of the relay Ü that had previously run via contact irix.

The rest of the process is the same as for - an internal connection. When the called party reports, a current impulse (return pulse) - is sent out, which temporarily brings the relay Pv to the rest position and thereby - switches on the relay A in the exchange -1 -, contacts 42 pv (in rest position), 46g, 15k, 116w , 117a, ir8u, relay A, -. The relay A responds; holds through contacts ri 9 g; - 117a, 118u and connects the incoming exchange connection to the company management by closing its contact 83a: The existing connection can be released by the exchange participant or the participant of the company management. If the subscriber hangs up first, the line selector is triggered in the exchange: and the occupied c-wire is opened. This will. the up to then existing holding circuit of the relay Uinterrupted.

If the release takes place by the participant of the company management, a tripping current surge is generated from this branch point in the manner already described sent over the common line, which the receiving relay at all branch points brings it to rest. By moving the contact 12o pv to the rest position the relay U, which while the connection exists via the c-wire of the line selector is excited; via contacts 12o pv, 12i g; i2: 2a short-circuited, so too in this case the relay U comes to waste.

By inserting the contact 94u the - holding circuit `of the Q relay is interrupted: On the other hand, a circuit for the relay 17 is established again via contact 123.q -I-, contacts' io2g, I23 q, relay M (winding II), contact 1o5 t, resistance WiB, -. Relay 1V1 responds and with its contact 103V2 and contact 104q short-circuits relay T , so that relay T drops out and, when the contact 9o t is switched, causes a triggering current to be sent to the company line in a known manner. The transmission of this current surge is only of importance in the case in which the connection is triggered by the subscriber. When the connection is triggered by the subscriber of the company management, a triggering current surge has already been sent out, so that a second triggering surge from the exchange is meaningless for the receiving devices at the branch points of the company management, since this is already under the influence of the first trigger current impulse are brought into the rest position: In the switching center itself by switching the contacts -47q and 42 pv a circuit for the relay K and the rotary magnet Dk is closed +; Contacts 42 pv (in the rest position), 469, q: 7 q; `Rotary arm 48 dk in the zero position; Relay K (winding II and. I), rotary magnet Dk, -. Relay K responds: and through contact 49 k shorts its winding II, so that the further circuit for Dk and K runs via rotary arm 5o dm in the zero position and contact 49k: When Dk-responds, relay G shorted. This brings about the transfer of the switching mechanisms Dk and Da to the rest position in the manner already described.

Occurs - a wrong assignment of the company. management, z. B. by interference current surges. (atmospheric discharges, inductive influence or the like :), or is the line through a participant; who picks up his phone and does not dial, is busy; so if you fail to dial after seizure after a certain time from the exchange, the transmission of a tripping current impulse is caused, which makes the seized line free again: when an interference current surge occurs; which brings the polarized receiving relay into the working position and thus does not differ in any way from an occupancy current surge; as has already been explained when initiating an internal connection, relay G for response +, contact 42 pv, rotary arm 43 dm in zero position, rotary arm 44dk in zero position; Relay G, resistance: Wi5, -. The relay G holds itself via its contact 45 g; but at the same time also closes a circuit for the relay W and the thermal relay Th -f-, contacts 549, 55 t, rotary arm 56 dne in neutral position, contact 57 x, relay W or Thermal relay Th, -. If, after the assignment, no election current impulses are sent out, @ is the indicator of an incorrect assignment. Therefore, after some time, the thermal relay Th, so that its circuit is not interrupted as in a normal connection by moving the .Dreharmes 56 dm, to respond and causes the relays M and M to be switched on by closing its contact 12.5 th T +, - contact 102g, relay T (winding II), resistor W212 or contact r23 q, relay 112. (Winding II), contact ras th, resistor Wi, .- Both relays respond, but no current impulse is sent to the company line , since the contact 128m as a follow-up contact only closes when the inrush current through winding I of the current impulse transformer Trv has already subsided. However, relay T is short-circuited via contacts 1031x and 104q so that it drops out. The current surge generated when the contact 9o t is switched over in the windings of the current impulse transmitter Trv is transferred to the company line and causes the transfer of all switching devices at all branch points to the rest position in the manner already described. However, the subscriber who "picked up his receiver and then did not continue dialing will be blocked as long as he has not hung up his receiver."

Claims (3)

PATENT CLAIMS: i. Circuit arrangement for delivering current surges to identify the branch point of a company management that initiates a connection in telecommunication systems, in particular telephone systems, characterized in that when initiating a connection, the dialing devices (D) at all branch points the company management to individual, automatic switching from one in the idle state of the system into a rest position by j e after calling branch different number of effective steps attainable starting position (o), from which the switching. works through the numbered current impulse series that characterizes the desired branching point be brought into the call position assigned to this branch point, advanced and switching means (N) in the branch points are used to transmit the series of identification current impulses during the automatic setting of the dials only by the calling party Allow junction off. 2. Circuit arrangement ° according to claim i, characterized in that; that the, idle position, (individual idle position - n) to one of the calling number of the Junction points corresponding number of steps before the starting position (o) or the switching path between the rest position and the starting position (A) for all Branch points is the same, but by 'arranging spaces between rest and initial position only saviel @ steps take effect, that in each case the the calling junction identifying the series of impulses from one of the calling numbers there is a corresponding rate of power surges at this point. 3. Circuit arrangement according to claim i, characterized in that in the one accessible to the common line Switching center switching means are provided; which when initiating an over the switching center incoming connection a secure transfer of the dialing devices at the branch points from the rest position assumed when the system was in rest cause in the initial position.