KR0141290B1 - Switching network for use in extending subscriber capacity in switch board - Google Patents

Abstract

The present invention relates to a switch network for expanding subscriber capacity of a small capacity electronic switch (DTS-1100), which is connected to a peripheral matching device to perform a time slot exchange function, a network synchronizer function, a conference call function, and a matrix switch device matching function. A plurality of time switch devices; A matrix switch device which receives a subscriber telephone channel data, matrix switch control data, and a clock output from the plurality of time switch devices, performs a bit rate conversion, stores, and reads, and performs a spatial division exchange function; It includes a plurality of time switch processor for transmitting and receiving time slot exchange information with the switch device. Therefore, it is possible to expand the capacity of the telephone subscriber and the trunk line of the existing small capacity exchanger up to four times.

Description

Switch network for subscriber capacity expansion of small capacity exchange

1 is a configuration diagram of a conventional switch network

2 is a block diagram of a switch network according to the present invention

3 is a redundant structure diagram of a switch network

* Explanation of symbols for main parts of the drawings

101, 200a-200d, 300, 302: time switch device

102a-102c: Relay line matching device

103: signal device 104: concentrator

105, 202a-202d: Time Switch Processor

201,301,303: Matrix Switch Device

The present invention relates to a switch network for expanding subscriber capacity of a small capacity electronic switching device (DTS-1100).

1 is a configuration diagram of a switch network of a conventional small capacity exchanger.

The subscriber network extension switch network of the small capacity switch is composed of a time switch device 101, a concentrator 104 and a relay line matching device 102a-102c.

The relay line matching devices 102a to 02c basically accommodate 120 relay lines, and have a function of the aggregation device 104 to accommodate 500 telephone line subscribers. According to the requirements of the system user, only one relay line matching device 102a is mounted in the system in the case of a 500-line relay line 120 lines of general telephone channel subscribers to perform relay line reception and switch network aggregation. In case of the maximum capacity of the system, 500 repeaters of regular telephone channel subscribers (102a-l02c), which accommodates 500 regular telephone channel subscribers and 120 relay lines, are matched to 500 regular telephone channel subscribers. Configure the line.

The test apparatus 100 and the signal apparatus 103 are matched to the time switch apparatus 101 to transmit the general subscriber test and various signals to the general subscribers through the switch network.

The time switch processor 105 exchanges a message such as time slot exchange information with the time switch device 101. That is, the conventional switch network is composed of a time switch stage performing a condensation function and a time switch stage performing a time slot exchange function, so that a typical telephone channel subscriber line having a maximum condensing ratio of 4: 1, and a relay line 360 lines.

Accordingly, an object of the present invention is to provide a switch network for expanding a subscriber capacity of a small capacity exchanger by accommodating an extension of an existing subscriber capacity by mounting a matrix switch device that performs a connection function between time switch devices of the small capacity exchanger.

Another object of the present invention is to exchange clocks between a time switch device and a matrix switch device of a small capacity exchanger, so that systems that use different synchronization reference clocks without being restricted by the separation distance when installing the small capacity exchanger are installed. That is, the present invention provides a switch network for expanding subscriber capacity of a small capacity exchange to enable communication between time switch devices of the small capacity exchange.

A switch network for expanding subscriber capacity of a small capacity exchange according to the present invention for achieving the above objects is connected to a peripheral matching device to perform a time slot exchange function, a network synchronizer function, a conference call function, and a matrix switch device matching function. A switch device; A matrix switch device configured to receive subscriber telephone channel data, matrix switch control data, and clocks output from the plurality of time switch devices, perform bit rate conversion, storage, and reading to perform a spatial division exchange function; And a plurality of time switch processors for exchanging timeslot exchange information with the plurality of time switch devices.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram of a switch network for expanding subscriber capacity of a small capacity exchange according to the present invention.

As shown in FIG. 2, the subscriber network extension switch network of the small-capacity exchanger includes a matrix switch device 201, a plurality of time switch devices 200a-200d, and a plurality of time switch processors 202a-202d.

The time switch device 200a-200d is connected to the matrix switch device 201 and the peripheral matching device and consists of four parts. The time switch exchange function, the synchronizer function, and the conference call are controlled by the time switch processor 202a-202d. Performs function and matrix switch device registration functions. Here, the peripheral matching device shows the test device 100, the signal device 103, the relay line matching devices 102a-02c and the concentrator 104 of FIG.

The time slot exchange function of the time switch devices 200a-200d is matched with a peripheral matching device to receive 2048kbps serial subscriber telephone channel data from 32 input sub highways and multiplex it to 8192kbps parallel subscriber telephone channel data. The multiplexed subscriber telephone channel data is sequentially written to the voice memory, and is randomly read by the time slot exchange information written by the control of the time switch processors 202a-202d, that is, the control memory data, and transmitted to the peripheral matching device. It is demultiplexed into 2048kbps serial subscriber telephone channel data. In addition, it is transmitted to the matrix switch device 201 for data transmission and reception with other time switch devices.

The network synchronizer function of the time switch devices 200a to 200d receives a reference clock for synchronization from a relay line matching device as a peripheral matching device to generate a clock to be used in the time switch device.

The conference call function of the time switch devices 200a-200d uses a PCM conference call element M116 that processes 32 time slots per unit element.

The matrix switch device matching function of the time switch devices 200a-200d bitrate converts the time slot exchanged subscriber phone channel data and converts the control data and subscriber phone channel data of the matrix switch device 201 to the matrix switch device 201. send. Then, the internal clock of the time switch devices 200a to 200d is transmitted to the matrix switch device 201 and, on the contrary, the subscriber telephone channel data and the clock are received from the matrix switch device 201 to perform bit rate conversion.

The matrix switch device 201 is connected to the plurality of time switch devices 200a-200d to perform a space division exchange function of 4 × 4 capacity. That is, the matrix switch device 201 receives subscriber telephone channel data, matrix switch control data, and clocks outputted from the plurality of time switch devices 200a-200d and performs bit rate conversion, storage, and reading to perform spatial partition exchange. Perform the function. In other words, the matrix switch device 201 receives the subscriber telephone channel data and the matrix switch control data from the time switch devices 200a-200d and bitrate converts them by the clock received from the time switch devices 200a-200d. Temporarily store in voice memory. The subscriber telephone channel data and the matrix switch control data stored in the voice memory are read by an internal clock generated by the matrix switch device 201, thereby performing spatial division exchange. The subscriber telephone channel data, which has undergone the space division exchange, is transmitted to the time switch devices 200a to 200d together with the internal clock of the matrix switch device 201.

The plurality of time switch processors 202a to 202d are configured by four to exchange time slot exchange information with the plurality of time switch devices 200a to 200d, and the plurality of time switch processors 202a to 202d using a processor data bus. Communicate between The communication information includes the matrix switch device 201 exchange information. That is, the time switch processor 202a exchanges time slot information with the time switch device 200a, and the time switch processor 202b exchanges time slot information with the time switch device 200b. The time switch processor 202c exchanges time slot information with the time switch device 200c, and the time switch processor 202d exchanges time slot information with the time switch device 200d.

The oral time switch device and the matrix switch device constituting the subscriber network expansion network with a redundant structure perform the redundant operation, which will be described with reference to FIG. 3.

The voice memory write address generation clock and the voice memory read address generation clock are not synchronized with each other when the subscriber telephone channel data is written to and read from the voice memory mounted in the time switch device 200a and the matrix switch device 201, and therefore, a collision occurs during voice memory access. This can happen. Since the memory of 2K byte capacity is used to prevent the voice memory collision, the time switch device (A) 300 and the time switch device (B) 302 can be regarded as transmitting the same data to the matrix switch device. That is, a maximum difference of one frame (125 μs) occurs between subscriber telephone channel data of the time switch device (A) 300 and subscriber telephone channel data of the time switch device (B) 302.

Therefore, when the subscriber telephone channel data is transmitted by the time switch device 200a, only the active plan time switch device transmits the subscriber telephone channel data. The cable between the time switch devices 200a-200d and the matrix switch device 201 is configured in redundancy.

The matrix switch device (A, B) 301, 303 selects one plan data by receiving parity search on subscriber telephone channel data received from the time switch device (A) 300 and the time switch device (B) 302. do.

Since the matrix switch device (A) 301 and the matrix switch device (B) 303 exchange a redundant signal and a clock, the clocks used in the matrix switch are equalized. When transmitting subscriber telephone channel data from the matrix switch device to the time switch device, the matrix switch device A and the matrix switch device B are transmitted separately. The time switch device selects the clocks received from the matrix switch device (A) and the matrix switch device (B) according to the clock monitor result, and the subscriber telephone channel data is converted into one plan by the valid bit (matrix switch connection status signal) and parity search. Select the data.

As described above, the present invention has the following effects.

First, by sending and receiving a clock between the matrix switch device and the time switch device, it is possible to remove the constraints related to the separation distance when installing the small-capacity exchanger, and to enable data communication of the time switch device using different synchronization reference clocks.

Second, the matrix switch control data is received from the time switch device without a separate processor for controlling the matrix switch device.

Third, since it is equipped with a matrix switch device that performs the connection function of the small-capacity exchange period, it can accommodate four times the capacity of the existing small-capacity exchanger.

Claims (5)

A plurality of time switch devices connected to the peripheral matching device to perform time slot exchange, network synchronizer, conference call function, and matrix switch device matching function; A matrix switch device configured to receive subscriber telephone channel data, matrix switch control data, and clocks output from the plurality of time switch devices, perform bit rate conversion, storage, and reading to perform a spatial division exchange function; And a plurality of time switch processors for exchanging time slot exchange information with the plurality of time switch devices. 2. The switch network of claim 1, wherein the matrix switch device performs a space division exchange function of 4x4 capacity. 2. The switch network of claim 1, wherein the time switch device and the time switch processor are four. 2. The switch network of claim 1, wherein the plurality of time switch processors communicate using a processor data bus. 5. The switch network as claimed in claim 4, wherein the communication information using the data bus includes exchange information of the matrix switch device.