PL161625B1 - Method and device for controlling transmitter snareceivers in a phone exchange - Google Patents

Abstract

System for controlling transmitters and receivers in telephone exchanges, especially those performing digital commutation, containing transmitters, receivers and a switching field, characterized in that the outputs of the transmitters (3) and receiver outputs (4) are connected to the input of the commutation field (1) through the sync and divide circuit channels (2), while the inputs of the receivers (4) and R2 (A) code transmitter input are connected via the synchronization system and split channels (2), with field output commutation (1).

Description

The subject of the invention is a system for controlling transmitters and receivers in telephone exchanges, especially those that implement digital commutation.

There are known telephone exchanges in which devices for generating information signals, i.e. tones, verbal messages and R2 code signaling runs, and the receivers of the R2 and DTMF code signaling runs function as handling devices. They are separate devices, spatially separated in the control panel equipment.

This division applies to both signal handling devices and information signal transmitters, while the transmitters are bound by the principle of rigid assignment of one signal content to individual channels. It requires a constant, large number of channels resulting from the sum of all combinations of signals, generated regardless of their degree of use. Moreover, the implementation of signaling exchange, resulting from its protocol, requires changes of the commutation state in the commutation field.

In digital-commutated exchanges, access to the operating devices is realized through a digital commutation field, and the signals are introduced to and from this field through a bi-directional PCM stream. The signals from the transmitters to the switching field are sent by the stream directed towards this field, and the signals to the receivers are sent by the stream in the opposite direction.

In the system according to the invention, the outputs of the transmitters and the outputs of the signal receivers are connected to the input of the switching field through the channel synchronization and splitting circuit, while the inputs of the receivers and the input of the R2 code transmitter are connected by the synchronization and channel division circuit to the output of the switching field.

The advantage of the circuit according to the invention is the ability to generate, in one state of field commutation, any combination of bi-harmonic signals. Thanks to this, the number of channels needed to exchange signaling with the R2 code is reduced, i.e. it is possible to flexibly use the rest of the channels in the PCM stream, e.g. by other service teams. Moreover, the proposed solution simplifies the communication between the operating devices and the AHU control.

The subject of the invention will be explained in more detail on the basis of an exemplary system, shown in the drawing in the form of a block diagram.

In the system according to the invention, the outputs of the transmitters 3 and the outputs and inputs of the receivers 4, as well as the input of the code transmitter R2A, are connected to the commutation field 1 through the synchronization and splitting circuit 2. The transmitter A is used to generate the code signals R2. The transmitter B produces tone signals, while the transmitter C is used to transmit verbal messages. The transmitters are spatially separated between the time channels of the PCM stream. The receivers 4 cooperate with the PCM stream directed to the commutation field 1

For the DTMF code, receiver a and receiver b. From the PCM stream 2, a signaling channel is separated, the content of which for tuning the R2 code transmitter A is fed to its input. The results of recognizing the signals in the receivers 4 are transferred to the system 2, through which they are introduced, synchronously in the signaling channel, to the switch field 1.

Claims (1)

Patent claim A system for controlling transmitters and receivers in telephone exchanges, especially those implementing digital commutation, containing transmitters, receivers and a switching field, characterized in that the outputs of the transmitters (3) and the outputs of the receivers (4) are connected to the input of the switching field (1) through a synchronization system and dividing the channels (2), while the inputs of the receivers (4) and the input of the code sender R2 (A) are connected, through the synchronization and dividing of channels (2), to the output of the switching field (1).