DE1487899C3 - Circuit arrangement for telecommunications, in particular telephone systems, in which character receivers or registers are looped into the connection path during the connection setup - Google Patents

Description

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which can make a recoding. To do this, the monitoring switching means cause. With such-

monitoring switching means are required, which the ger dimensioning and switching of the control inputs

trigger any necessary switching operations and one can be connected to the monitoring switching means

corresponding looping in of registers or with the character receiver also the termination

Character receivers or their short-circuit after 5 a connection by loop interruption.

Cause connection establishment. put and report to central facilities so that

Should or can, in the case of partial storage and missing, the release of a connection in a particular one special end-of-election criterion the switching fan way is possible.

A known magnetic core module can be used as a monitoring switching device, which can only be dialed after a certain of the low-resistance control windings in the speech path that is switched on after the last digit has been sent is switched on.
Waiting period can be initiated, the information about it. In the following, based on the figures Outputs, that no more dialing characters are to be expected. Management examples of the circuit according to the invention - The switchover which then takes place can therefore already fall into the arrangement and its application in the conversation that has already started and an indirectly controlled telephone system. Make noise. But it can also be too early, Fig. 1 shows schematically the basic Aufd. H. Before dialing the actual last digit, the construction of a directly or indirectly controlled remote number must have been made, so that intercom system in which a switching device containing the inventive see the register and the relay set monitoring 20 circuit arrangement are required. is looped in before a group election stage;

The invention is now based on the object of F i g. 2 shows an example of the application of the invention to create an arrangement with the help of which it is possible, according to the circuit arrangement in a remote area, to subsequently select the subscriber intercom, in which the keypad selection or which, after switching has already taken place, a dial selection is used;
Switching back to another feed point, for example FIG. 3 shows a modification of the register shown in FIG. 2, and with the circuit arrangement shown therewith;

connected connections of various feed points Fig. 4 shows schematically the basic structure

to the respectively connected subscriber station this build a centrally controlled telephone system

to be carried out noiselessly for the participant. 30 the one the circuit arrangement according to the invention

This is achieved by the fact that the switching device between subscriber ohms Monitoring station provided with control inputs and outgoing relay set in the connecting means is constantly looped into the speech path of a connection;

in front of another, in a known manner at Einlei- F i g. 5 shows the circuitry in detail

function of the character receiver or register in each case 35 Execution of the in FIG. 4 shown schematically

effective feed point are arranged. switchgear that can be looped in as well as the relay

With the invention it is in particularly simple sentence, and

Way possible to switch the supply of F i g. 6 shows an application of the invention during the existence of a connection effective circuit arrangement in a telephone seed Dining point on a z. B. during the dismantling system, in which certain parts of the switching device given by dialing signals or during the connection are further centralized.

effective feeding point. Each in F i g. 1 a subscriber station TN is shown

after centralization of the monitoring switching means , which via the call finder AS, a set

can switch over from the monitoring loop switching device X and the relay set RS

switching means is connected to the group selector GW while the connection is being established or 45. the

even during the existence of a connection independent switching device X contains the monitoring device

depending on the switching means of the then effective device UE, a character receiver ZE and one

Feed point initiated and carried out, memory ZSP or a register REG. This radio

without causing annoying noises. for the sake of clarity

The monitoring switching means can be shown as a single structural unit at the same time

are used between subscriber stations with Num- which also supply the subscriber station circuit

Membrane disk selection and subscriber stations with data take place while the connection is being established

to distinguish between the choice of stature. For this purpose can can. There is also a supply from the relay set

The control inputs of the monitoring switching means RS are possible, as are the circuit symbols shown

z. B. be dimensioned and connected in such a way that they show 55. Depending on how the telephone system works

in the event of a current imbalance in the speech cores, the setting of the optional levels, e.g. B. of the group

of the connection path, a change in the establishment dialer GW can be made directly or indirectly. There-

cause the state of the monitoring switching means. depends on, among other things, the respective training

In systems in which only dialing characters in the form and mode of operation of the switching device X from. are sent out by digit pulse series, or in 60 common applies to both types of systems, systems in which a distinction is made between that in the switching device X by the monitoring dial and keypad selection in the actual device UE of each of the spoken character receivers and the prevailing state is recognized and, depending on the keypad dialing characters, are accompanied by a loop interruption of the communication sent out by the subscriber station TN , the control inputs 65 dialing characters can be configured and switched to an effective switching of the character type so that they can be activated at a receiver ZE or of the memory ZSP or the return of the powerlessness of the speech wires of the register REG takes place. This also includes in each case a connection path a change in the operating state evaluation device in which, for example, a change

Keypad dialing characters are set in digit-current impulse series. The ZSP memory is used in indirectly controlled systems for partial or full storage of the transmitted dialing characters.

The switching devices UE, ZE, ZSP and REG can also be arranged centrally in the interests of less effort and, if necessary, looped in via coupling devices. Thus, for example, only connection links can remain in the course of the line and a further functional unit can be formed from the remaining units, which in the on-the-fly connection is looped into the occupied connection line when a connection is requested. The various options for centralizing structural units will be discussed in the description of the other figures.

In Fig. 2 shows a circuit arrangement which can be used in directly or indirectly controlled systems in which both keyboard selection and number dial selection is possible. The subscriber station circuit TN is connected to the relay set RS via the call finder AS and the monitoring switching means of the monitoring device UE. Depending on the state on the speech cores α and b, the monitoring switching means cause a central character receiver ZE to be requested or looped into the speech cores α and b when keypad dialing characters are sent out, while the dial pulses go directly to the relay set RS .

The subscriber station TN shown works with direct current keyboard selection according to the diode-earth method. It consists of the speech circuit SP and a set of pushbuttons, via the contacts tx, ty of which one or both diodes D 1 and D 2, which are connected on one side to earth, in a combination or polarity corresponding to the given coding to one or both speech wires α and b are switched on. The monitoring switching means arranged in the course of the line consist of a toroidal core RK with an approximately rectangular hysteresis loop, which is provided with the control windings I and II, the query winding III and the switching winding IV. The interrogation winding III is continuously supplied with bipolar interrogation pulses, which cause magnetic reversal processes in the toroidal core and, in the absence of direct current control excitation, trigger the transistor T via the switching winding IV and thus cause the relay AN to be quiescent.

When the handset is picked up in the subscriber station circuit and assigned, the following is initially set Supply circuit effective:

1. Earth, UX, UA, lan, 2d, 4, IIRK, 3, AS, b, SP, tg, a, AS, 1, IRK, 2, ld, lan, IA, IX, minus.

Since the control windings I and II act in opposite directions, the magnetizations generated by them cancel each other out and the relay AN remains energized.

It is now assumed that the subscriber station sends out a keypad dialing character whose coding corresponds to the connection of the diode Dl to the wire α. When the button is pressed, the speech circuit SP is switched off by the contact tg common to all buttons, and the following circuit results:

2. Earth, Dl, tx, a, AS, 1, IRK, 2, ld, lan, IA, IX, minus.

By interrupting the supply current on wire b , the magnetic core RK is now only excited with direct current by its control winding I and is therefore put into the saturation state. The bipolar interrogation pulses can no longer cause magnetization reversal, which means that the activation of the relay AN is interrupted and it drops out. This switches the supply to the following supply circuit:

3. Earth, Dl, tx, a, AS, 1, IRK, 2, Id, lan, R 2, minus.

At the same time, when contact 3 is opened, relay E drops out:

4. Earth, 3 on, E, minus.

With contact 1 e a signal receiver ZE is requested via a coupling device (not shown) (requests:

5. Earth, Ie, 1 /, ..., minus (in ZE).

During the connection of the character receiver ZE , the relay D is activated from this:

6. Earth (in ZE) ,. .., D, minus.

With contact 3d the relay F is energized:

7. Earth, 3d, F, minus.

This interrupts the request current for the character receiver ZE and keeps itself in the circuit:

8. Earth, le, If, F, Minus.

Via the contacts 1 d and 2 d , the speech wheels were switched to the character receiver ZE , from which the further supply takes place:

9. Earth (in ZE), ..., 2d, 4, HRK, 3, AS, b, TN, a, AS, 1, IRK, 2, Id, ..., Minus (in ZE).

The transmitted keypad dialing character is now evaluated. The evaluated and converted criteria are sent to the relay / in the form of series of numbered current impulses. This is shown separately from the character receiver ZE , but can also be included in this. The relay / transmits the current impulses with contact 1 / to the line:

10. Earth, HX, JlA, Ad, R3, Ii, IA, IX, Minus.

After evaluating the keypad dialing character, the character receiver ZE switches itself off and the relay D de-energizes. Contacts Id and 2d cause the speech wires to be switched to the connection path, but cannot yet

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completed keystroke continue to be monitored, since subscriber station for the corresponding dialing time

in this case the relay AN and the relay E chen each effectively switched rectifier Dl

still remain de-energized. Therefore, there is initially the or D 2 arise. The winding V of the toroidal core

Monitoring circuit 3 continues. In the direction of the RK is used to pre-excite it in a certain

When the connection is established, the loop remains saturation with direct current. This is

received clock 2 e in circuit 10. At the end of, among other things, a counter-magnetic

At the push of a button, the relays ON and E are again activated and thus the relay ON is activated

turned on. With the contacts lan and lan it is only for a control alternating current of a certain strength

follows the connection of the speech wires and with to enable and not for the minor ones

Contact 2 e the separation of the circuit 10. io fault currents, which via the line resistances and

Since the monitoring switching means in the form of the feed relays A and X flow. Corresponding to the ring core RK when the keyboard is selected on the Schleifenun DC pre-excitation, the coding of the keyboard symmetry responds, this must be selected for each transmission, so that keyboard selection characters are available for each individual display. However, due to the half-waves of the coding of these characters for modulating the ring, cases 15 kernes suitable direction are available, in which a symmetry due to current. It should also be noted that the relay AN consists in restlessness of both wires. In order for the circuit not to be excited for all critical states and that therefore an evaluation current in one of the two control contacts is in the opposite direction to that shown in FIG. To enable 2 show windings I and II is to work for this th functionality.
Cases of connecting a high-resistance resistor 20 In FIG. 4, an indirectly controlled telephone booth R1 via the contact tz of the subscriber system is partially shown, which is provided using the station on the wire α , which causes the required circuit arrangement according to the invention to produce unsymmetrical. tet. Within a switching network KF , the subscriber

In the case of an erring station TN from the subscriber station initially via route 1 with the following dial selection, the symmetry of the two via route 2 with the outgoing relay set speech cores α and b is not disturbed by the switching device X and this loop interruption which also allows RS to connect. After the completion of the further no modulation of the tran connection establishment via the toroidal core RK, the switching device X looped in via the paths 1 and 2 sistor T or the switching relay AN and thus also looped-in switching device X is to be looped out. The no request for a character receiver ZE- 30 switching device X contains the following in this appendix. The loop pulses are sent directly to the monitoring device UE and the character temp storage relay A. catcher ZE. It is equipped with a central control device

If the in F i g. 2 shown circuit arrangement ZST and via this with the central memory

connection in a telephone branch exchange connected to ZSP.

turns, in the inquiry or transfer option 35 After establishing the connection path 1 through

The central control device ZST is switched off in this by pressing the earth button at the subscriber stations

is given, then by such a criterion the first received in the character receiver ZE

also requested a character receiver. These dial characters indicate the direction of the desired connection

detects the earth button pressure and controls the relay Y dung and a corresponding relay set RS

on. This keeps itself in the circuit: 40 requested. After the establishment of route 2 to the outgoing relay set RS , the possibly in the central

11. Earth, 3e, Y, 2x, 2 /, R 4, minus. central memory ZSP still stored dialing characters

from the switching device X via route 2

Via contact 1 y , earth is transferred to wire α, this relay set and there into the corresponding

switches as long as the earth key in the subscriber 45 characters to be forwarded, z. B. 'Earth impulses,

station is actuated because the circuit 11 is implemented via the. Are in the central memory ZSP none

Contacts 3 e and 2 / are available for the duration of the dialing characters to be forwarded, and

Asymmetry of the speech cores is controlled by a certain minimum number of dialing characters.

tion of the relay ON remains closed. By having been sent in this way, a toggle command from

The resulting asymmetry of the wires is addressed by the Re- 5 ° of the central control device ZST to the

lais X and evaluates the earth key pressure. direction X given. The speech path is in the

In Fig. 3 is another embodiment of a switching direction X on the outgoing relay set monitoring circuit for the switched in the circuit RS . Are from the subscriber station shown in FIG. 2 running processes in the user TN in this switching state of the connection path shown by keypad dialing characters. With 55 no further dialing characters are sent out, so its terminals 1 to 4 at the correspondingly designated points of the in FIG. 2 circuit shown in turn switched on at the command of the central control device arrangement. The monitoring takes place ZST, the path 3 is set up in the coupling network KF and there, via a single control winding I of the ring with the looped-in switching device X short-core RK, via which an alternating voltage of a ^{closed circuit is} closed. The switching device X and the paths 1 of the grounded generator G by means of the two capacitors and 2 are activated. A possible Nachoren C symmetrically on the two speech cores α choice from the subscriber station TN leads to a and b is fed. If, in the subscriber station criteria input from the relay set RS to the central station TN, ground potential is applied to one of the two speech control devices ZST and thus to a new one α and b , an alternating current ⁶ S request from a switching device X or to the erkrcis comes about , which is a modulation of the control ncute structure of routes 1 and 2 in the switching network KF. winding I causes. This modulation takes place with the help of the circuits shown in Fig. 5 rectified pulses, which are generated by the in the switching device X and the Rclaissatzes RS

now the functioning of these two devices explained in more detail. In the switching device X , a toroidal core RK1 is again used as the monitoring switching means, which is provided with the control windings I and II, the interrogation winding III and the switching winding IV. The transformer T1 is controlled via the switching winding IV. The switching device X contains a character receiver ZE for the dialing characters transmitted by the subscriber station TTV. The subscriber station TN is fed via this character receiver ZE when the switching device X is in the idle state, ie after it has been occupied, but before the dialing. The control windings I and II of the toroidal core RKl are polarized in such a way that the toroidal core is in the saturation state due to the direct current excitation caused by the supply current and a modulation by the bipolar interrogation pulses cannot take place. Accordingly, the relay AN can only be energized via the transistor T1 when the supply circuit is interrupted by the subscriber TN when a keyboard or dial dial is sent and the control windings I and II are de-energized. Correspondingly, the toroidal core RKl works in the relay set RS. However, it is only provided with one control winding I, which is located in wire a of the connection path.

For the explanation of the connection setup or the dialing character evaluation that follows, it is assumed that the connected subscriber station TN sends out dialing characters that either consist of loop interruptions or are accompanied by them and cause the relay AN in the switching device X to drop out, but this is shown in this switching state has no effect. The dialing characters arrive at the character receiver ZE, and from there they are passed on to the central control device ZST , where the desired connection direction is evaluated after the first dialing characters. After this evaluation, the relay set RS of the desired connection direction is connected from the central control device ZST to the switching device X via path 2 in the switching network KF . Since the connection direction has already been determined, the further dialing characters already received can be passed on in pulses from the central control device ZST via the switching device X and the relay set RS . The relay / in the switching device X is operated in pulses from the control device ZST , and this forwards the pulses via its contact 1 / to the relay JB in the relay set RS :

12. Earth, 1 /, Rl, DrI. 4d, bl, b3, lc, JB, minus.

With contact 1 ib 4 earth impulses are given via the outgoing wire α.

Depending on the mode of operation of the telephone system, the central control device ZST at a certain point in time, for. B. after evaluating a certain number of digits of the dialed number, a switchover command is given to the switching device X. This is sent one after the other to relay DH and relay D. With contact ldh , earth is connected to wire α 2 or «3 to relay set RS , which saturates the toroidal core RKl in relay set RS and the relay AR drops out:

13. Earth, ldh, Rl, DrI, 3d, al, a3, JRKl, SDl, minus.

When relay AR drops out , relay C in relay set RS is energized:

14. Earth, lar, C, minus.

The relay JB is separated from the wire b 3 by moving the contact ίο Ic. By the time shift of the Umschaltebefehle to the relay DH and D, the relay D is excited little later. The contacts ld, Id, 3d and 4d are switched over. The connection path is thus switched from the subscriber station TN via path 1 of the switching network KF, via the switching device X and via path 2 of the switching network KF directly to the relay set RS . The supply of the subscriber station TN is thus also switched from the character receiver ZE to the relay set RS. There is therefore the following supply circuit:

15. Earth, 5Dl, Ic, b3, bl, 4d, ld, JJRKi, bl, TN, al, JRKl, ld, 3d, al, a3, JRKl, SDl, minus.

If the subscriber station TN dials further, the relay AN in the switching device X responds, whereby a criterion is given to the central control device via the still closed contact 5d and the then closed contact Lan and the relays DH and D drop out. This means that the character receiver is looped in again.

If the connection has progressed so far that path 3 has already been set up in the switching network KF , and if the subscriber TN then makes a by-dialing in the form of a loop current interruption, this leads to a renewed pulling of the Re- Ims, AR and a delayed release of the relay C. in the relay set RS to a criteria input via the contacts 3c and lar to the central control device ZST. This causes the request from a switching device X or the renewed establishment of routes 1 and 2 in the switching network KF.

In the following, on the basis of the in FIG. The circuit arrangement shown in FIG. 6 describes the processes taking place when a connection is set up for a telephone system which, using the circuit according to the invention, according to the method shown in FIG. 1 works and in which the connection of subscriber stations with dial dial or of subscriber stations with keyboard selection is possible. The switching device X is, however, divided into individual functional groups, which are centralized in a different way according to the frequency of their use compared to corresponding groups in the figures already described.

The in F i g. The circuit arrangement shown in FIG. 6 shows part of a connection path between a subscriber station TN ' and the first activated group selection stage GW. The connection path runs via the call finder AS and the two speech addresses a and b to the feed point (relay A) of the group selection stage GW.

While the connection is being established, the looping of the monitoring system is carried out via the wires a 1 and b 1 or al and b 1 by means of the coupling device Kl.

Claims (4)

1 2 will. It is possible, only in case of need, claims: d. H. depending on the switching status of the mentioned monitoring switching means, a keyboard selection part 1. Circuit arrangement for telecommunication, subscriber station a signal receiver only for the special telephone systems in which to be assigned during 5 duration of the connection setup. When setting up the connection, depending on the switch to the directly controlled telephone exchange of the connection and the switching status, systems in which subscriber stations with pulse dialing from monitoring switching means character receivers and subscriber stations with keypad dialing are to be switched on or registers in front of which are to be after the establishment of the connection, can then be the establishment of a Connection binding effective feed point for the Spe- io initially run in such a way that when the handset is lifted, the subscriber station of the calling subscriber device in the calling subscriber station is looped into the connection path via the mers, subscriber selectors a connection of the speech wires characterized in that the with the first feed point pre-monitoring switching means (RK or RKl) located in front of the low-resistance control inputs (I, II) to be set by the dial characters (I, II) is used to set the speech path for the transmission dig in the speech path (a, b ) to prepare a connection before numbering disc pulses to the feeder relay of another, in a known way with looping. If keypad dialing characters are sent out by the subscriber station jefung of the character receiver (ZE) or register, then (REG) the respective effective feed-in point is assigned, which determines the switching status of the speech path. 20 knowing monitoring switching means to the effect 2. Circuit arrangement according to claim 1, there and cause the looping in of a character characterized by the fact that the control inputs of the receiver with possibly associated Wahlum- (I, II) are dimensioned and switched in such a way that setter in the speech path. Regardless of whether the looped-in signal receiver of each subscriber wire (a, b) of the connection path is assigned a change point or centralized when the current imbalance occurs, the operational status of the monitoring speech path must be switched again after the connection has been established (RKj RK I) . normally through which a short 3. Circuit arrangement according to claim 1, including the looped-in character receiver characterized that speaks the control inputs. (I, II) are dimensioned and connected in such a way that 30 With the processes described here, a change point is connected to a change point when there is no current in the speech switchover of the supply to the calling subscriber wires (a, b) of the connection path. In the event of a keypad selection participant in the operating state of the monitoring station, the supply is initially carried out via the switching means (RK, RKl) upstream of the switch . first option level to be controlled 4. Circuit arrangement according to one of the pre-35 relays, then from the character receiver and according to the preceding claims, characterized in the connection setup again from an optional level, net that as low-resistance control inputs for the similar processes run in the connection monitoring switching means (RK, RKl) the control building in indirectly controlled telephone exchange windings (I, II) of a magnetic core (RK, RK 1) systems. Here, for example, in the course of the connection with an approximately rectangular hysteresis loop 40, looped-in registers are required, which are used. Record dialing characters, request relay sets and cause a setting of the elective levels. The up taking the dialing character in the register can after the principle of full storage of the entire call 45 number or partial storage where The invention relates to a Schaltungsan- only a certain, z. B. to recognize the order Sufficient part for telecommunication, especially telephony desired connection direction systems in which during the connection establishment of the user station z. B. in the form of digit-dependent from the switching status of the connection and the telephone number transmitted by remote pulse series Switching state of monitoring switching means is 5 ° chert and evaluated, whereupon after evaluation Character receiver or register in front of the after switching on and through to the desired direction or construction of the connection effective feed point for the transmission to a corresponding relay set the feeding of the subscriber station of the calling part - the remaining digit pulses in this direction dinehmers be looped into the connection path. can be done directly. In the case of full storage and Circuit arrangements of this type are used in both 55 the partial storage is a switchover of speech for example, in directly controlled telephone systems way to different dining points, z. B. the des used when the switching status of a control register or that of the connected relay set, binding as to the type of required by the participant. In the case of partial storage, the switchover Frequently transmitted dialing signals are monitored in themselves already in a dialing pause, the should to z. B. when sending keypad selection 60 when the relay set is in the desired direction sign a suitable sign receiver, if there is enough space available. transmission of dialing impulses that receive or. Activate the feed relay. The character template borrowed or used exclusively the keyboard choice, Catcher will therefore appear before the requirements set up as they were for direct binding effective feed point in the connection 65 controlled systems have been described. The appropriate looped in so that each subscriber-controlled relay set must have keypad dialing characters provide individual assignment of a character receiver and / or impulse series can process, and as gers and thus avoiding excessive effort and expense of registers, facilities must be used