DE1110247B - Method for monitoring ring core evaluation fields for the subscriber identification of telecommunication systems, in particular telephone systems - Google Patents

Description

Method for monitoring ring core evaluation fields for the subscriber identification of telecommunication systems, in particular telephone systems. It is known to use ring core evaluation fields in telecommunication systems, in particular telephone systems, for subscriber identification. In these toroidal fields, evaluation loops are threaded through a number of toroidal cores corresponding to the number of digits of the subscriber call numbers according to the subscriber call numbers, with these taking over the function of shunting rings and transmissions. So z. B. in a field with four columns - one column generally corresponds to a decade - and ten lines, i.e. with a total of forty toroidal cores, a total of ten thousand clearly distinguishable toroidal core combinations, each including four columns, can be formed.

Depending on the type of supply, those are threaded through the toroidal core field Evaluation loops via coupling elements with one or both ends fixed connected to the wires of a subscriber line. The same over the subscriber line and the evaluation loops of the toroidal core field Identification loops are used when z. B. a transfer of office this transfer of office assigned identification contacts individually to all Office transmissions common test generator switched on, Simultaneously with closing An identification loop over the test generator is used to determine the test process controlling switching devices.

Depending on the type of testing process, a distinction is made between pure series testing, column testing and parallel testing. In the pure serial testing a single test receiver in the absence checked dependence of a timing chain, the individual annular None of Auswertefeldes sequentially. On the other hand, in the column or row parallel test, several or all toroidal cores of a column or row are tested simultaneously by a corresponding number of test receivers and the individual columns or rows are tested one after the other.

Since such identification devices are all central devices, it is advisable to provide monitoring devices that check each result obtained for its uniqueness in order to avoid the connection establishment being impaired or even disturbed as a result of external or internal disturbances or that - for example in Connection with automatic billing - as a result of an incorrect result, the incurred charges are incorrectly assigned to an unaffected subscriber.

The present invention is therefore a method for Monitoring of ring core evaluation fields for subscriber identification. This The method according to the invention is characterized in that the individual Toroidal cores column-wise scanning test receivers recorded preference result except a memory is also fed to a control device, which only occurs when it rains an unambiguous test result of the respectively checked decade the reversal the test receiver arranges for the next decade.

A method and further details will be described in detail using the basic circuit diagram shown in the drawing. The basic circuit diagram shows two of the subscriber stations to be identified for subscribers Tln 2122 and Tln 1222 with their connection lines for exchange transmission A Ue and the toroidal evaluation field AF with the evaluation loops 2122 and 1222 coupled to the subscriber lines and the common control loop KS. Also shown are the test receivers E 1 to E 0, a control chain ASK for connecting the test receivers, the test generator G with the exchange switch A W and the common control device KE and the memory SP with the converter U for converting the »1-out -10 «codes in a» 2-out-of-S «code and with a control chain ESK for the numeric input of the evaluation result in the memory.

When the identification device is occupied by the requesting exchange transmission A Ue, the associated evaluation loop, e.g. 2122, is first closed by the identification contacts 1d21 and id22 via the generator G and the switching device ASK in controlling the connection of the individual test receivers P 1 to P 0 not shown.

In the column parallel test used in the present example, the ten existing test receivers E 1 to _E 0 are coupled in the first test step via contacts t to the toroidal cores of column T, which corresponds to the thousand decade, and the result obtained is once via the converter U, in a manner not shown the memory SP and on the other hand the common control device KE supplied. Simultaneously with the setting of the connection control chain ASK, the setting of the control chain ESK takes place for the numeric input into the memory.

Now speak in the checked column, e.g. B. T, two or more test receivers at the same time, then in addition to the ring core excited by the identification loop (e.g. 2 T), other ring cores also incorrectly display a signal via coupling paths or as a result of an interference pulse. The test result is therefore ambiguous. In this case, the control device KE causes, in a manner not shown, the repetition of the evaluation process for this decade or the entire identification process and the deletion of the ambiguous result already stored, since in the event of interference, e.g. B. od by switching clicks on the subscriber line. DgL, the identification in the case of repetition will probably proceed properly.

However, it is also used in the case of repetition as a result of interference An ambiguous call result again via coupling paths from the control device determined, the subscriber is in a manner not shown from the transfer of office separated. As a result, the participant is forced to contact the responsible fault location communicate.

If, on the other hand, all test receivers remain ineffective during the identification test, then there may be a fault in the identification device itself. In such cases, the control device therefore initiates an internal check of the identification device in a manner not shown. For this purpose, the generator G is switched over to the control loop KS, which runs through all the ring cores of the ring core evaluation field, via the contacts U1, U2; all ring cores are thus excited, so that all ten test receivers must respond during the test control of the column if all test and connection elements involved in this test step are in order.

If the internal control shows that the identification device is faulty is, if there are replacement test and connection devices on this switched. If, on the other hand, there are no equivalent switching elements, the from calling subscriber desired to establish a connection while waiving the determination of the calling subscriber released. Simultaneously with the activation of the participant the partially stored call number is deleted by the identification device and an interfering signal is triggered.

If, on the other hand, the internal control shows that all test and Connecting elements are working properly, i.e. there is no internal fault, so will the participant is also separated from the transfer of office and thus his official traffic prevented. In this case either the evaluation loop is defective, or it is the participant tried to short-circuit the speech wires, e.g. B. by pulling up the dial at the time of identification, the test voltage becomes ineffective do. By releasing the connection, the subscriber is also forced to to notify the fault location, but on the other hand an intended bypass prevented from identifying.

Through the foregoing in detail, for example in connection with automatic billing in private branch exchanges for monitoring ring core evaluation fields for subscriber identification once safely avoided that the accruing fees wrongly not one affected participants are assigned. On the other hand, errors within the Identification device by the internal control which is initiated immediately each time immediately recognized and signaled, so that the scope of an internal disturbance is largely restricted. Furthermore, the normal official traffic in the case an internal malfunction of the identification device is not hindered, but the desired one Connection released immediately in the event of a lack of replacement switching elements. on the other hand become participants who want to evade identification in some way, immediately separated from the delegation so that they do not take advantage of their Manipulations can pull.

The procedure is by no means as outlined in the example the subscriber identification in connection with the automatic billing limited in private branch exchanges but it is equally applicable in public ones Offices or similar systems and regardless of the coupling with the automatic Billing.

Claims (2)

PATENT CLAIMS: 1. Method for monitoring ring core evaluation fields for subscriber identification in telecommunication systems, in particular telephone systems, in which the individual ring cores are arranged in rows and columns, each column corresponds to a specific decade and any number of evaluation loops closed simultaneously via the subscriber lines through one of the numbers The number of toroidal cores corresponding to the columns are threaded, of which only one of the toroidal core combinations corresponding to the individual loops is effective, characterized in that the test result recorded by the test receivers (El to EO) scanning the individual toroidal cores column by column apart from a memory (SP) also has one Control device (KE) is supplied, which only causes the test receivers (El to EO) to be reversed to the next decade (e.g. T) when a clear test result is available for the respective decade checked (e.g. T). 2. The method according to claim 1, characterized in that if there is an ambiguous test result on the evaluation of the excitation state of the individual toroidal cores within a decade (z. B. T) either the evaluation process is repeated only for this decade or the entire identification process. 3. The method according to claim 1, characterized in that in the absence of a test result on the evaluation of the excitation state of the individual ring cores within a decade (z. B. T) all test receivers (El to EO) and connection elements (ASK) involved in the test within this decade ) can be checked via a control loop (KS) running through all toroidal cores of the toroidal core field. 4. The method according spoke 3, characterized in that in the event of an internal malfunction of the test and / or connection devices is switched to replacement test and / or replacement connection devices. 5. The method according to claim 3, characterized in that in the event of an internal fault in the test and / or connection devices and in the absence of corresponding replacement switching elements, the respective subscriber to be identified (z. B. Tln2122) is enabled by the identification device. 6. The method according to claim 5, characterized in that simultaneously with the activation of the subscriber (z. B. Tln 2122) already partially stored call numbers are deleted and an interference signal (S) is triggered. 7. The method according to claim 2 or 3, characterized in that the existing connection line is disconnected if, when the identification process is repeated several times, there is always an ambiguous test result within the same decade (e.g. T) or all internally checked devices are working properly.