DE1009670B - Circuit arrangement for telecommunications, especially telephone systems, with dialer operation and inductively sealed lines - Google Patents

Description

Circuit arrangement for telecommunications, in particular telephone systems, With selector operation and inductively sealed lines In telecommunications, in particular Telephone systems often raise the requirement, besides, for, the connection establishment and dismantling necessary normal switching processes, such as assignment, number selection, triggering, also the incentive for special switching operations, e.g. B. for consultation, transferring, signaling to the civil servant who are important for private branch exchanges. Are the lines, especially the connecting lines, inductively sealed off by means of transformers, so it is not possible without further ado, usually through a certain potential at the connection points, such as earth connection to the line wires by means of a button Incentive for the special switching operations to be transmitted over the line. One is forced these incentives in the form of power surges, be it alternating current surges or inductive direct current surges, to be transmitted from the connection point to the office and there to convert it back into the desired labeling potential. So are the rest of them Switching operations, in particular dialing numbers, by series of current impulses over the cordoned off Transfer, care must be taken that not falsely the for the transmission of the identification of the special switching processes serving current surges as election rushes and vice versa the election rushes, as a characteristic of the special Switching operations in the incoming. Transfer of office to be evaluated.

Arrangements are already known which can be confused of the two switching processes: thereby exclude the fact that although they are used for the selector setting Serving type of surge also for the transmission of the special incentives over the cordoned off Use line., In the incoming exchange transfer but one forwarding each Series of current surges only after a minimum number of current surges has been recorded, e.g. B. after one or after two recorded power surges, is possible while at recording. only this minimum number of power surges is prevented from being passed on as elective power surges, on the other hand, the identification potential for a particular switching process is generated. In order to pass on the series of numbered current impulses according to their true numerical value, therefore require the known arrangements to send out an additional number from current impulses to the numbered current impulse series identified by the numerical value. This is suppressed when dialing numbers, when a special switching process is identified evaluated against it.

The invention is based on such known arrangements in which the additional current impulses in the connection point itself with the help of the impulse transmitter, usually generated by the transmission mechanism driven by the dial 15 will. This number current impulse transmitter is designed so that it has a or usually two additional impulses are generated for each numbered impulse series, so So that for the digits 1, 2 to 0 current impulse series of three, four to twelve current impulses. be sent out. The earth connection required for the special switching operations at the subscriber station, usually by a key, on the other hand, generated in the Station-assigned intent transmission only the minimum number of power surges, which transmitted over the cordoned off line and in the incoming office transmission can be converted back into the earth potential. Should the earthing button on the Subscriber station are avoided, so must not only the surge transmitter, but also the dial was designed for the identification of one to twelve power surges in order to be able to send out only two electrical surges. These solutions require a. special dial mechanism and. therefore mean a special construction of the subscriber stations.

The invention has set itself the task of an inductively sealed off Connection point from besides the dialing pulses also a marking potential for special Switching operations, such as B. earth, to transfer to office without a specially trained Station to have to provide. Rather, it should only be used for branches Subscriber station. with earthing button. This goal is achieved according to the Invention achieved by timing elements in the transmission at the outgoing line end and Switching means are provided which are controlled by the calling subscriber in the case of the number, the surge receiving and transmission relays influenced automatically the additional minimum number of numbered current impulses to be added to the series of numbered current impulses (e.g. two) generate, while those to initiate special switching operations of given to the subscriber station via the connection wires for outgoing transmission special. Identification potentials (e.g. earth) in a known manner only the Generate minimum number of power surges (e.g. two).

Figs. 1 and 2 show an embodiment of the invention.

Fig. 1 shows with omission of all for an understanding of the invention circuit details that are not required include a so-called prefix transmission UV near a TS telephone station. This locks the subscriber line on outgoing end inductively. In the transfer of intent, on the one hand, the at the number dialing generated loop interruptions at the subscriber station in inductive DC surges are converted in a known manner for each loop interruption a pair of inductive power; bump, namely a positive and a. negative shock, generated. In addition, two additional power surges are added in the intent transmission every series of impulses. On the other hand, if earth is connected to the Station on the speech arteries. as an incentive for a special shift in the Intentional transmission only generates two power surges. Of course, there could be a minimum number of the current impulses to be added to the numbered current impulse series. Power surge or three and more additional power surges are also generated.

In Fig. 1 a, the generation of only one additional current surge is indicated.

In Figure 2, the circuit of the incoming counter transmission UK is im Office shown. This transmission is with a preselection organ, z. B. a selection, tied together.

When an outgoing connection is established, the following play out Switching processes from When the subscriber at the subscriber station TS lifts his handset, the prefix transmission UV, thus the subscriber line TL and the counter transmission U K as well as the connected preselector and a group selector occupied. After taking off of the handset, the subscriber loop is established via the closed hook switch contact HU closed, causing relay S to respond: 1. +, S II. X II, nsi, HU, XI, S I, 1 sa, Wi 6, -. Relay X does not speak as a differential relay in this circuit at. Relay S switches relays. Sb a 2nd +. 3s, 4i. Sb, -.

Relay Sb switches on relay Sa: 3. +, 7sb, SaI, -.

Relay Sa switches on relay Vc: 4. +, 8sa, Vc, -.

When relay Sa responded, winding I of the transformer Tr switched on: 5th +, 9 sa, 10 vc, 11 va, Tr I, -.

This creates a current surge in the secondary winding of the transformer Tr generated which, however, does not get onto the line because the secondary winding is not yet connected to the transformer Ue 1, which is blocking the line. This current surge may have a certain direction, e.g. B. positive direction. When relay Vc responds, the circuit is opened by opening contact 10vc open for winding I of transformer Tr. This will result in the secondary winding a negative induction surge is generated, which now on the following path on the transformer Ue 1 and thus on the line: 6. TrII, 19vc, Ue1I, 20sb, 22va, TrII.

This current surge is used to clean the connection line and possibly for the return of the receiving relay in the counter transmission to the Rest position in the event that the relay has previously been in the working position due to a glitch has been killed. Relay V c remains energized throughout the connection. relay Vc switches on relay B: 7. +. 16 va. 17 vc, 18 th, B II, B I, -. Relay Vc switches also relay Vb on: B. +, 16 va, 17 vc, 25b, Vb, -.

After energizing relay Vb, relay Va is switched on: 9. +, 26 vb, 27 vc, Va, -.

Relay Va remains energized throughout the connection. Furthermore, switched on by relay Vb relay Vd: 10. +, 33 vb, Vd, -.

After energizing the relay Va. will turn a circuit over the winding I of the transformer Tr is closed and thereby in the secondary winding a positive induction burst produces: 11. +, 9sa, 15vb, 11va, TrI, -.

This current surge is transmitted to the line in the following circuit: 12. Tr I I, 23 v b, Ue 1 I, 19 vc, T r II.

When relay Va responds, the current flow for winding TrI (see current flow 11) at contact 11v is interrupted and a negative induction surge is generated in the secondary winding, which is also transmitted to the line, since relay Ijb is still connected. Relay L'b drops out after the relay Tja is energized, since its current flow (see circuit 8) is interrupted at contact 16va. When relay Vb drops, relay Vd also drops. Likewise, the circuit for relay B (see circuit 7) is interrupted by contact 16vd and the relay is brought to drop out with a delay.

So there are three inductive power surges on the occupancy Transfer line, of which only the last two in the countertransference be effective.

In the transmission UK, the incoming positive induction shock shifts the polarized relay Tk or its contact from the rest position to the working position. This switches on relay Im : 13. +, 120 jk, Im, -.

Relay Im switches on relay V: 14. -f-, 100 jin, VI, VII, -. Relay Jm also switches on relay Ek: 15. +, 101 jm, 102 on, Ek, Em I, -.

In this circuit there is also relay on in series with relay Ek excited. The relays Ek and Ein remain energized during the connection. After speaking of the relay Ek, a loop to the preselector is closed via the speech wires: 16. a-vein, 104 jm / 121 k, Ar I, 103 ek, Ar II, b-vein. Through the loop formed the selection VW is started in a known manner. He looks for one in free choice. free group selector and occupies it. By the incoming over the line negative induction shock becomes the anchor of the bridge to the speech veins Receiving relay Jk returned to the rest position. This also brings the auxiliary relay Jm to waste. Depending on the drop in relay Jm, relay V drops out with a delay. When relay V drops out, relay Er is switched on 17. +; 106ek, 107v, He, -.

Relay It maintains itself independently of relay V via its contact 132 he.

When dialing a number, the number disc expires at the subscriber station the impulse contact nsi opened in pulses. This makes the loop pulsatile interrupted. Relay S in the transmission header drops out as a pulse. This impulsive The relay S drops out. also the auxiliary relays Sb and Sa. The circuit for Relay S b is from contact 3 s, then the circuit for relay Sa on contact 7sb interrupted. The relay times. are chosen so that relay Sa drops out when the receiving relay S responds again with the next pulse. The fall of the Relay S is also switched on again relay Vb: 18. +, 28 va, 29s, 30 vc, Vb, -.

Relay Vb remains while the number is dialed, regardless of the pulse-wise Interruption of his current flow at contact 29s, excited by means of a contact 32vd capacitor resistor connected in parallel. By relay Vb became namely relay Vd is also energized (see circuit 10). When the relay Sb drops, the following becomes Circuit for the winding TrI closed: 19. +, 13sb, 12va, TrI, -.

This creates a positive induction surge in the secondary winding TrII induced, which is transmitted to the line in the following way: 20. Tr II, 21 sb, Ue 11, 19 vc, Tr II.

If the loop relay S responds again when the loop closes, the auxiliary relay Sb is also switched on again, and this switches in turn the auxiliary relay Sa on. When the relay Sb responds, the circuit for the Winding TrI interrupted at contact 13 sb. This interruption causes the Secondary winding Tr II generates a negative current surge, which again on the Ledtung is transferred :, 21. Tr I I, 23 vb, Ue 1 I, 19 vc, T r II.

In this way, one after the other for each at the subscriber station generated loop interruption when dialing numbers one pair each inductive Power surges sent to counter-transmission. If relay S after the first loop break responds again, the following power crane for relay J is closed: 22. +, 35 b, 36 vd, 37 s, J, Wi 1, Wi 5, -.

Relay J speaks, however, in this circuit as a result of its Winding parallel connected capacitor C 7, which with the resistor. Wi 1 forms a timer, not on. If relay S drops with the second pulse or with the second loop interruption again, so the circuit 22 for relay J interrupted at contact 37s. At the same time, however, the capacitor C7 has contact 40s and resistor Wi 4 discharged, so that relay J is also in the discharge circuit of this capacitor cannot respond. This game repeats itself for each of the Subscriber station incoming number current surge. If the from the subscriber station Relay S responds again and again. As a result, relay Sb initially responds again and, depending on this, relay Sa too. The relays Va and Vb begin to drop out with a delay. Since the capacitor C7 is no longer short-circuited via contact 40s, relay J comes after one certain time to respond, adjustable by resistance Wi 1 (see current flow 22). As soon as relay J responds; the following is still during the release time of the relay Vb, Circuit for the winding TrI closed: 23. +, 33vb, 34vb, 14j, 12va, TrI, -.

This indicates a positive induction surge in the secondary winding, which is transmitted over the line, since relay Vb is still energized. After this If the relay Vb drops out, the circuit for the winding TrI on contacts 33vb, 34vb interrupted and thereby a negative induction surge in the secondary winding TrII induced. This is transferred to the line in the following way: 24. Tr II, 24j, Ue 11, 19 vc, Tr II.

Relay J was delayed during the. Relay Vd still drops held (see circuit 22). After the relay Vd drops out, relay Sb comes on for a short time to the waste, since its current flow (see. Current flow 2) now both at contact 4 j and is interrupted at contact 5vd. Relay Sb closes after it has dropped out again via contact 13 sb a circuit for the winding TrI (cf. 19). This again creates a positive induction surge in the secondary winding TrII induced, which is transmitted via the line (see. Circuit 20). After the waste of relay Vd, the power supply for relay J is interrupted at contact 36vd (cf. Circuit 22). During the release time of relay J, the following circuit is made for Relay year closed: 25. +, 38j, 39vd, Jh, -.

Relay Jh again switches on relay .Sb: 26. +, 3s, 6 jh, Sb, -.

Relay Sb responds again and opens its contact 13sb, so interrupting the circuit for the winding TrI. This creates a negative induction shock induced in the secondary winding Tr II, during the delayed, fall of the Relads J is transmitted to the line via contact 24 j. That way are two additional. Pulse pairs have been transferred to the line. After that, in the Transmission UV continuously energizes the relays S, Sa, Sb, Va, Vc.

If only a single additional impulse is to be transmitted, then is to apply a circuit as shown in the basic form of Fig. 1 a. The receiving relay J is switched off in a pulsed manner by the pulse contact nsi, which with its contact j 1 gives the pulses to the line TL. During the The delay relay V b is continuously energized in the usual manner; as a result, auxiliary relay Ih is switched on impulsively via contact j2. That I with each pulse but contact j 3 opens, the timing element consists of a capacitor C and resistor Wi2, connected in parallel to the auxiliary relay Jh, so that this during the number current impulses do not respond. Capacitor C becomes after each Impulse discharged through contact j3 and resistor Wi3. Only after relay J. the number current impulse series responds again continuously, relay Jh after a certain address time dependent on the timers. With his contact there is jh 1 another impulse on the line. By bridging the discharge resistor Wi2 via contact jh3 and resistor Wi 4 can influence the release time of relay Jh will. Another possibility is, instead: resistor Wi4 and contact ih3 Condensate. sator C and. Resistance Wi2 of the timer via contact jh2 and resistance Bridging Wi5.

In the countertransmission UK (Fig. 2), the positive induction surge of the first number current surge puts relay Jk or its armature from the rest position into the working position. This energizes relay Jm. Relay jm switches on relay V. Relay V remains energized while the number current surges are received. Relay jm is de-excited again by the negative induction current. When relay Jm drops out, relay Y is energized: 27. +, 108 ek, 109v, 110 he, 113z, 111 jm, 115z, 112 k, Y, -. On the positive. The induction impulse of the next pair of impulses in turn triggers the relays Jk and Im. After relay Im has responded, relay Z is now energized: 28. +, 108 ek, 109v, 110 er, 114y, ZI, 122 jm, 112k, Y, -. Relay Z is independent of relays M and K in the following circuit 29. +, 108ek, 109v, 110er, 114y, ZI, 116z, ZII, -. Relay Jm drops out again as a result of the following negative induction surge. Relay K is then switched on: 30. +, 108 ek, 109 v, 110 er, K, 111 jm, 116 z, Z II, -. The relays K and Z stay in series in the following circuit during the number current impulse: 31. +, 108 ek, 109 v, 110 er, K, 117 k, 116 z, Z II, -. When the next positive induction surge arrives (third current surge), relays Jk and jm respond again. While the relay chain Y, K, Z previously prevented the transmission of number dialing pulses over the voice lines for group dialing, when relay Jm is triggered, the loop over voice wires 32. a-wire, 104 jm, 124 he, 123 k, 103 ek, Ar II, b wire at contact 104 jm open. This is the first time that a voting impulse is given to the group voter. In the same way, the following dialing pulses are then passed on depending on the dropout and response of the relay jm. At the end of the series of impulses, the relays Jk, Im and V come into their rest position one after the other. After the relay Im drops out, the loop via the speech line to the group selector is finally re-established. After relay V has dropped out, the holding circuit (see circuit 31) for relays Z and K is interrupted at contact 109v. It should be made up for the fact that relay Y has already come down through contact 1121z after relay K has responded as a result of the opening of its excitation circuit (see circuit 27).

Is used to initiate a special switching process, e.g. B. Incentive for an inquiry from an extension subscriber, earth by pressing the TA button. the subscriber station TS is applied to the voice wires, one winding of the differential relay X short-circuited in the feed bridge. Relay X speaks in series with the already excited Relay S via its winding I to: 33. +, TA, HU, XI,, S1, 2sa, Wi6, -. Relay X switches on relay T: 34. +. , 40x, T, -.

Relay T switches on the auxiliary relay TH : 35th , 41 t, TH, -.

After the key has been pressed, relay T drops with a long delay as a result of a capacitor resistor element connected in parallel via contact 49t away.

When relay T responded, the inferential circuit for the winding was established TrI closed: 36th +, 44th, 42t, 12 va, Tr I, -.

This creates a positive induction surge in the secondary winding induced on the: line in the following. Circle is transferred: 37th TrII, 47t, Ue1I, 19vc, TrI.

When relay T7-1 responds, the circuit for winding Tr I at contact 44 tla is opened. This induces a negative induction surge in the secondary winding TrII. of the two contacts connected in parallel 48 tlz and. 47t transferred to the line TL . will. The relays X, T and TH now fall one after the other. After the relay T has dropped, a circuit for the winding TrI is recently closed during the dropout time of the relay TH : 38th +, 45th, 43t, 12 va, TrI, -.

This in turn generates a positive induction surge in the secondary winding TrII, which is now closed via the. Contact 48 th on the, line is transmitted. By opening the contact 45 th (cf. current flow 38) a negative induction surge is generated on the secondary side, which is transmitted to the line TL that the relay B switched on via contact 50 tlt falls off after the relay TH has dropped out and during its fall time Via its contact 49 b, the Wick-Jung TrII connects to the primary side of the transformer Ue1.

In the countertransmission UK, the first pair of current impulses cause the Relays jk, Jm, V switched on and switched off again. The relays Ek, Em, Er are already excited. Relay V comes after the negative induction surge has been received in it Fall to the fall, because the fall of the relays T and TH in the transmission UV certain pause between. two pairs of current impulses is greater than the pause between the number current surges. After relay V responded, relay Y responded (see circuit 27). After the relay V has dropped, the transmission UK to the b-wire earth potential switched on: 39. +, 108 ek, 118v, 119y, Ar II, b-wire.

This potential forms the incentive criterion for inquiry switching; it remains connected to the b-wire until depending on the arrival of the next one Impulse pair relay V responds again. By the next positive induction pulse In turn, the relays Jk, Jm, V are connected to this pair. Relay V switches by opening. Contact 118v off the earth again from the b vein. A transfer these two current surges as selective current surges is prevented by relay K in this case does not respond and the impulse loop over, the two speech wires does not release. After the relays Jm and V have responded. Relay Z switched on (see circuit 28). The, relays Jk, Jm and V successively returned to the rest position. After the relay Jm has dropped out Relay Y to drop, whose hold circuit at contact 111 jm is interrupted. To If relay V drops out, relay z drops out.

The connection is triggered by the fact that the subscriber hangs up his receiver. This interrupts the loop over the speech wires to the transmission UV. The relays S, Sb, Sa come to waste one after the other. When relay S drops out, relay Vb is switched on again: 40. +, 28 va, 29s, 30 vc, Vb, -.

After relay Vb has responded, relay Vd is switched on again. After relay Sa has dropped out, the circuit for relay Vc is interrupted at contact 8sa. Relay Vc drops out after a delay. After the relay Sb has dropped, it is again over Contact 13sb closed a circuit for the winding TrI and thus a positive one Induction shock transmitted via the line to the counter transmission UK. After waste of the relay Vc drops out as a result of the opening of the contact 27vc relay Va. To. waste of relay Va drops by opening contact 28va relay Vb and then Relay Vd off. A negative induction shock is not transmitted in this case.

In the countertransference UK are due to the positive induction shock the relays jk. Jm and V turned on. When relay jk responds, it becomes relay Ek short-circuited via contacts 101 jm, 130 em. Relay Ek drops out with a delay. When relay Ek drops out, the holding circuit of relay Er at contact 106 ek is opened. Relay It comes to the dropout with a delay. After the relay Ek dropped out, the excitation winding was I of relay on at contact 105 ek interrupted, but relay Em still holds during the release time of relay V in the following circuit: 41. +, 131v, 132 em, Em I I, -.

After the relay V drops out, this holding circuit is also opened. relay One drops off with a delay. The reset winding is turned on during the release time of the relay II of the polarized receiving relay Jk switched on 42. +, 126 ek, 127, em, Jk II, Wi 9, -.

This brings the armature of the receiving relay back into the rest position. The transmission is thus in the rest position. When the relay Ek dropped, it was through Opening of the contact 103 ek the loop over the speech wires to the occupied group dialer opened and thereby its triggering and the triggering of the other connecting devices initiated in a known manner. The traffic to the subscriber station TS in incoming Direction is of no importance for the invention and is therefore not described.

Claims (7)

PATENT CLAIMS: 1. Circuit arrangement for telecommunications, in particular Telephone systems with dialer operation and inductively sealed connection lines, in which the series of numbered current impulses to be transmitted over the cordoned off line by an additional number of over and above the indicated numerical value Current surges (minimum number) are increased and switching means at the incoming end of the line the elective impulses of a numbered impulse series only after the inclusion of a minimum number of current surges (e.g. two) exceeding the number of current surges as such, on the other hand, if only the minimum number of power surges is received, suppress their transmission and convert it into a special switching process (e.g. consultation incentive), thereby characterized that in the transmission (UV) at the outgoing line end timing elements (c7, wi 1) and switching means (J, Jh) are provided. are. which are controlled by the Impulse current influenced by the calling subscriber station when dialing the number and transmission relays (S, Sa, Sb) automatically add those to be added to the series of current pulses generate additional minimum number of power surges while those initiating special Switching operations from. the calling subscriber station via the connection wires to outgoing transmission given special identification potentials (e.g. earth) in this only the minimum number of power surges! (e.g. two). 2. Circuit arrangement according to claim 1, characterized in that a relay (J) for generating the additional current surges in the outgoing transmission (UV) is provided which, although influenced by the incoming number current surges, is preferably switched on, but which is a coordinated timer (c7, Wi 1) is assigned, which becomes effective. of the relay during the recording and forwarding of the number current surges initially prevented and only after them. Termination allows. 3. Circuit arrangement according to claim 2, characterized in that da.ß the timer during each pause between the number current surges ineffective by the surge receiving relay (S) done, preferably, that a capacitor (C7) is discharged through a resistor (Wi4) and only after termination a numbered burst series is released (Fig. 1). 4. Circuit arrangement according to Claim 2, characterized in that the fall time of the relay (jh) by. Bridging of the whole or individual parts of the timing element via its own contacts of the relay is influenced (Fig. 1 a). 5. Circuit arrangement according to claim 2, characterized. marked, that the relay (J) immediately when it is energized following a recorded Number surge series instead of the number surge series recorded by the number current surge series controlled transmission relay (Sa, Sb) the transmission of the first additional Current impulse takes over and in connection with the end of the recorded number current impulse series characteristic switching means (S, Vb, Vd) switching means (Sb, Jh) to operate, which generate a second additional surge of electricity. 6. Circuit arrangement according to Claim 1 to 5, characterized in that the switching means of the outgoing transmission both the power surges picked up by the subscriber station and the additional ones Current surges each as a pair of oppositely directed, inductive direct current surges Pass on (positive and negative) over the line to the incoming countertransference. 7. Circuit arrangement according to claim 5 and 6, characterized in that the Stromstaßempfangsrelais (S) of the outgoing transmission (UV) auxiliary relays (Vb, Vd) are controlled which on the one hand generate the end pulse (negative) of the first additional pair of current impulses, on the other hand the number current impulses Transfer relay (Sb) after it has been excited at the end of the series of numbered current impulses again for the transmission of the first induction impulse (positive) of the second additional impulse pair to drop and at the same time prepare its reconnection via an auxiliary relay (Jh), which from the the first induction impulse (positive) of the first relay (J) transmitting additional current pulse pair. Considered publications: German Patent Specifications No. 849 429, 867 873.