DE1000057B - Arrangement for recording the number of the calling subscriber in telephone, in particular telephone branch exchange systems with charge printers - Google Patents

Description

GERMAN

In telephone systems with display of the charges by automatic charge printer, the transmission the number of the calling subscriber on the printing facility is one of the most important subtasks. The detection is particularly important in private branch exchanges where several subscribers use the same exchange line the subscriber number is important for the charge printer assigned to the exchange line.

Various arrangements of this type are already known. So is z. B. known the relevant Subscriber connection through special switches via test circuits operated with alternating or audio frequency, which are superimposed on the speech or test wires, test again and this search process to be used directly or indirectly to record and transmit the relevant number. According to another arrangement, the call searcher used to establish the connection is after the call is terminated allowed to run back into the rest position, with current surges being sent out for number acquisition to serve. In another known arrangement, the call finder to which the Subscriber connections in a specific order are switched on, continue to run in two processes after a certain point, with the call subscriber characteristic power surges to the slip printer. In a different arrangement a calling subscriber is identified in his control center by issuing special interruption impulses on the line loop to the control center. The subscriber set is included for this purpose equipped with a special sequence disc, the cams corresponding to the groups of digits to be transmitted or has teeth. Further additional funds are provided to disc the special drain put into action in a suitable manner and at the right time.

These known arrangements require a considerable amount of contacts and additional Switching means and have, if the subscriber counter is used to operate the contacts, still the disadvantage that the subscriber counter also falls for each register operated and thus the participant is charged a local fee.

The new arrangement avoids these disadvantages and solves the problem in a simple manner by the the dial pulses different loop pulses for the identification by reversing the direction of the loop current be generated. These identification pulses are according to a development of the invention of a switch operated synchronously with the dial sequence supplied in series with the Dial breaker is provided in the loop circuit. By parallel to the two sub-arrangement to record the number of the calling subscriber in telephone, in particular Telephone PBXs with charge printers

Applicant: South German telephone apparatus, Cable and wire works A. G., TEKADE,

Nuremberg, Nornenstr. 33

Curt Eichler, Nuremberg
has been named as the inventor

breakers lying, oppositely polarized, direction-dependent switching means, z. B. diodes, is achieved that depending on the direction of the loop current only one or the other breaker as a pulse generator takes effect.

The following exemplary embodiment is intended to explain the new concept and further details of the invention. In Fig. Ι the simplified circuit of a subscriber set is reproduced. It is assumed that a common exchange dialer switched AW to the subscriber after the exchange code had been dialed. This means that the relay S located on the a / & wires, through which the feed current of the local power source flows, has the two relay windings / located via contacts all / HI instead of the usual through connection to the office. / responds and switches on relay U via il (Fig. 2). The contacts μ I and μ III (Fig. 1) in the supply current loop reverse the polarity of the voltage leading to the participant. A current interruption is avoided by a transitional circuit of the a and & wires. While a loop closure does not trigger a switching effect, an interruption would act as a false pulse and falsify the dialing structure. As a result of this polarity reversal, the subscriber alarm clock, because it is polarized, rings for a short time and thus signals that the subscriber set has been switched through to the charge printer.

Before dialing the number for the calling subscriber, the number ο must now be dialed again, during which the subscriber identification is sent to the printer. To generate them, there is a further interrupter ki in series with the interrupter nsi in the subscriber loop circuit (Fig. 3), the

is controlled by an identification disc running synchronously with the dial. Essential for the differentiation of the tag and dial pulses generated in the same circuit is on the one hand, the opposing current direction for the two pulse trains, on the other hand, the oppositely poled rectifier elements lying parallel to the interrupters D ι, D 2. It is thus achieved that each ki only the contact or nsi is effective for the interruption, which the rectifier is parallel in reverse direction.

The Η-contact is interrupted by a special identification disc, which according to Art the fire alarm signaling is provided with breaker cams. It is so on the axis of the dial arranged that it only expires when one ο has been raised. The one-time expiry of a Such a disc allows as many identifiers to be formed for ten to twelve cams as for one hundred-part headquarters are required. By omitting one or more interruptions it is possible to form the various groupings of numbers that correspond to the identification numbers of the participants. The missing pulses result in pauses in the transmission that allow the Counter can be used for the next decade. These identification numbers can be linked to the subscriber numbers to match.

The interruptions of the contact ki by this identification disc take effect on the 6 * relay of the control center. The j-contact transmits the impulses to the relay /, which is im. Interrupts the rhythm of the impulses. Contact iI (falling) brings relay V via contact u II (attracted), contact ill sets the first drum Zi in motion via contacts? / 1 and uml , while relay V holds itself through delayed fall via the first series of pulses.

As already mentioned, the entire pulse series of the Η disk is repeatedly interrupted for the purpose of forming groups of digits. After the first series there is therefore a short pause due to the missing pulses, which is sufficient to release relay V as a result of switching contact i I, while relay / remains energized for s (il).

Contact / II (Fig. 5) switches on the relay Um when it drops, because the .soi contact was closed with the first counting step. The wml contact switches to the second drum Z 2 of the pressure meter, in order to keep itself on with mot II (Fig. 5).

The impulse transmission continues with the second series; the contact ill (Fig. 4) now works on counting drum Z 2. The counter contact ζ 02 (Fig. 6) prepares the circuit for a possible third series of a third counting drum or when the impulses are finished with the second series , V drops again, with will -s 02 on the ^ L relay. AL picks up after the pulse has expired.

The contacts al I and al III (Fig. 1) switch the relay / off and the line through to the office. The participant now receives the official sign and begins with the actual election. Contact aiii (Fig. 6) had opened the [/ -circle, contacts M-1-μ III (Fig. 1) have fallen back into the rest position, and the current reversal is thus canceled. The nsi dial is effective for the subscriber , since D 2 is now blocked.

The AL relay can be switched over while the K-disc is running, because the timing of the disc is fixed. With the first pulse, a relay G (Fig. 7) operating with a set drop-out delay is switched off. Its fall coincides with the end of the pulse series; Contact g is in the rest position, AL is switched on via the contact ζ οι, which has now closed. The G relay is switched on by the relay / already when the line is occupied (i III - ζ ο ι - G).

The switching process described above has caused the calling subscriber's own identification numbers are brought to print counters (number drums), which z. B. in addition to the other number drums for fee units and dialing digits are located in the charge printer. All of them are also reset here Counter as soon as the participant hangs up, automatically or in small devices by hand.

With the reset, the ζ contacts are brought to their rest position, which leads to the switching off relay Um and the ^ 4L relay. The system is then immediately ready for a new connection.

In house traffic, the aforementioned circuit remains ineffective, as it is only available after dialing the outside line code comes into action.

Claims (9)

Patent claims: 1. Arrangement for recording the number of the calling subscriber in telephone, in particular Telephone extension systems with charge printers by dialing pulse «! different, The subscriber-characterizing interruption of the loop current, characterized in that the pulses for the identifier are generated by reversing the direction of the loop current. 2. Arrangement according to claim 1, characterized in that a synchronous with the dial sequence operated interrupter for the subscriber identification (ki) and the usual dial interrupter (nsi) in the loop circuit and means («I, will) are provided, which the direction of the loop current reverse depending on a dialing digit. 3. Arrangement according to claim 2, characterized in that each of the two breakers a direction-dependent switching means is parallel and these switching means with respect to their forward direction are switched against each other. 4. Arrangement according to claim 1 or one of the following, characterized in that the interrupter for the identifier is controlled by a disc that runs with the dial and contains the identification of the device in the form of cams. 5. Arrangement according to claim 1 or one of the following, characterized in that switching means become effective by dialing the exchange code instead of switching through to the exchange line, which switch on the marking device of the charge printer (al) and make a Umpokmg of the supply current in the loop circuit of the subscriber (U). 6. Arrangement according to claim 1 or one of the following, characterized in that after the end of the identification pulse series switching means (G) become effective, the delay of which corresponds at least to the expiry of the identification disk and which cause the reverse polarity of the supply current and the connection to the office (AL). 7. Arrangement according to claim 4, characterized in that by omitting certain cams in the identification pulse series gaps arise and that switching means (/, U, Um) are provided, the resulting impulse groups as multi-digit numbers on the marking drums of the charge printer. 8. Arrangement according to claim 4, characterized in that the cam disk so mi't the rotary dial is coupled so that it only runs when you select one ο. 9. Arrangement according to claim 1 or one of the following, characterized in that on the Contacts arranged on counting drums cause the system to be reset. Considered publications:
Swiss patent specification No. 220 600. 1 sheet of drawings © 609 739 12.56