DE2223364A1 - PROCEDURE FOR TESTING MESSAGE CHANNELS IN REMOTE COMMUNICATION, IN PARTICULAR TELEPHONE SYSTEMS - Google Patents

Description

Method for checking message channels in Pernmelde-, in particular Telephone systems.

The invention relates to a method for testing communication channels in computer-controlled telecommunications, in particular telephone systems, in which one A plurality of exchanges via bundles of communication channels with one another is connected, in each of which a message channel in a predetermined order each bundle as a data channel for establishing a connection via the communication channels This bundle is used and for this purpose with modems consisting of a number of modems be selected in each case, for the channel-compatible transmission of the data at its ends is completed. -When exchanges of this type in mobile communication systems are used, it must be expected that the individual exchanges often change their location and that the news channels to all connected to it Switching centers can also be set up and wired anew more often in a very short time have to. It must be carefully checked each time whether there is no Pehler has committed, or whether not a bad contact one or more Makes news channels unusable and therefore withdraws them from traffic. This happens in that the operating or construction personnel every installed channel at least by means of a so-called speech test for its occupancy capacity and speech permeability examined. This has the disadvantage that at least two people are busy checking and that the testing process of a larger trunk group takes a long time takes, the operation of which has not changed News channels must go on undisturbed. In addition, the speech sample does not reveal whether the channel is data transmission quality owns.

The object of the invention is closer to provide a method that a Check the functionality and speech permeability of the channel in both Allows directions in the shortest possible time without the use of personnel, with the additional equipment expenditure must remain as small as possible. The operation must not be carried out by checking be hindered.

This task is solved in telecommunication systems of the type mentioned by that for checking the message channels, the computer controlling the switching activity selects a free modem for the duration of the test, regardless of whether already There is a data channel in the diaper that occupies a communication channel, the selected one Modem connected to this and in the opposite exchange to the occupied one Channel also a modem is connected that between the computers with the help of the modems test messages are exchanged in both directions, and that subsequently the thus connected and checked message channel is triggered again.

Because the computer controlling the switching activity also is used to control the test connection, a separate test device is not required in each of the participating exchanges. It is also not necessary to own to provide known test transmission and to connect it to the message channels, because the existing modems have test reports in both directions over the voice lines which are within the voice frequency band and in the used Form include very wide level ranges that are processed by the modems. Through this such an exchange of test messages corresponds completely to a bilateral exchange carried out Speech rehearsal without having to use the speaking and hearing people. The non-functional capability of the pilot wires is also examined by the fact that documents and Triggering made with all characters transmitted in both directions will.

At the same time, the modems are also in the counter-exchange checked for proper connection to the news channels and their work.

In the intermediary activity of the computer, step in between small pauses that he can use to check the news channels. In this way, the placement activity is not hindered and yet in the shortest possible time Time examined a larger number of news channels.

If there is no free modem available for the test, Thus, according to a further development of the invention, an existing data channel of the checking or another bundle is released for a short time and the modem for the test connection is used. This has the advantage that in this way the new ones are added News channels checked as soon as possible to start operations.

The exchanges of such a telecommunications system have a Computer-controlled switching network, at which mostly all are reciprocal or directed message channels to be established are connected.

Such a communication channel usually has one for each direction of transmission ? Speech wires and 2 signal wires. The communication channel is via these signal wires occupied and eventually triggered again when all required messages are over the speech wires were exchanged. Just like this news channel is too a number of modems with the same Switching network connected. the The other side of each modem ends in the computer that controls the establishment of the connections.

Should now be a communication channel between this and the opposite exchange are set up, the computer first occupies a modem and switches this device in the switching matrix to a communication channel leading to the remote exchange at. A request is then sent to the counter-switching center via the message channel that is occupied in this way, connect a modem to this channel. This then also happens via the Switching matrix of the switching. In this way, the computers of both offices are with one another tied together. You exchange different data channels with the help of the modems via the data channel created in this way Search and feedback that are not of further interest here, which in the end result for the Establishment of one or more connections via the other communication channels of this Lead a bundle.

The invention is used to test the individual message channels one of the modems in each exchange. Regardless of whether straight If a data channel exists, the computer builds it in the same way as a data channel a test path. However, no search and feedback are transmitted now, but specially marked test messages, all of which are otherwise for a structure prevent additional measures required for a user connection. These test messages are taken from a memory of the computer in the exit office, in the computer the counterpart Exchange processed, and according to the test feedback connected there evaluated in the computer of the exit office.

If the attempt to occupy a test route is negative, a Signal set, which means that the signal wires of the channel are disturbed. at A successful assignment attempt is only possible when a modem is switched on in the remote exchange requested. A negative test result from a terminated with a modem Message channel Is a sign of faulty speech lines, which is also signaled. Only if the test is successfully completed, the channel. as assignable in the computer marked.

If all modems of the outgoing exchange are busy, there is the possibility available, the possibly existing data channel of the bundle to be checked to dissolve and to check with the modem that has become free. If the result is positive, remains then pass the tested channel as a data channel.

But it is not a free modem and also not a data channel in this bundle exists, then a data channel of another bundle could be temporarily terminated and the test path can be set up with the MQdem that has become free. However, it is undesired, the test will be carried out at a later point in time, e.g. if a modem becomes free, tries again or a corresponding message is issued. To this Thus, one after the other, all news channels become one newly added, one expanded or re-commissioned bundle in one from the computer of the one Switching point given sequence on their functionality and language permeability checked.

The check can be carried out through manual measures, through an error message or routinely started.

When one of the two exchanges set up a data channel wants, but the other checks, or when checking two at the same time with the same Bundles of connected exchanges can happen that the same message channel occupied by both sides. In systems with priority allocation for the individual Switching centers, the one with the lower priority draws its occupancy return. In systems without priority allocation and in exchanges the same Priority is examined in both places whether it is a Check assignment or a data channel formation. Depending on which type of occupancy has priority is granted, one occupancy is maintained, but the other is triggered.

6 claims

Claims (6)

Claims W method for testing message channels in computer-controlled telecommunications, in particular telephone systems, in which a majority interconnected by exchanges via bundles of communication channels is, in which a message channel of each bundle in a given order as a data channel for establishing a connection via the message channels of this bundle serves and for this purpose with modems, each selected from a number of modems is completed for the channel-compatible transmission of the data at its ends, d u r c h e k e n n -z e i c h n e t that for checking the message channels the computer controlling the switching activity has a free modem for the duration the test, regardless of whether a data channel already exists in the bundle, that a communication channel is busy, the selected modem is connected to it and A modem is also connected to the channel occupied in this way in the opposite exchange that 3sZYischen the computers with the help of the modems in both directions check messages are exchanged, and that then the wired and tested communication channel is triggered again. 2. The method according to claim 1, d a d u r c h g e k e n n -Z e i c h n e t that when all modems are busy, the existing data channel of the bundle is terminated and the message channel to be examined is checked with the modem that has become free and that after testing has ended, the tested message channel exists as a data channel remain. 3. The method according to claim 1, d a d u r c h g e k e n n -z e i c h n e t that if all modems are busy, an existing one Data channel one and @@@ bundle dissolved and the one to be examined with the modem that has become free Message channel tested @ w @ rd and that again after the test @@ de @ modem has ended otherwise available. 4. The method according to claim m or 3, d a d u r c h g e k e n n -z e i c h n e t that with no free and no free modem as well as with faulty message channels or message channels that are not connected in the remote exchange a corresponding message is given. 5. The method according to claim 1, d a d u r c h g e k e n n -z e i c h N e t that the computer controlling the switching processes is the modem which controls received test messages to be sent and evaluated. 6. The method according to any one of the preceding claims, d a -d u r c h e k e n n n z e i c h n e t that at the same time from the opposite direction for test purposes or message channels occupied by the exchange for data channel formation lower priority withdraws its occupancy.