KR960028663A - Subscriber Concentrator for Small Capacity Electronic Switching System - Google Patents

Abstract

The present invention relates to a subscriber concentrator of a small-capacity electronic switch, comprising: a clock receiving unit (100) receiving an 8 KHz clock and an 8192 KHz clock output from a time switch device, and an 8 KHz clock output from the clock receiving unit (100); An internal clock generator 101 for generating a frame synchronization signal and a 2048 kHz clock by dividing an 8192 kHz clock, a processor matching unit 105 for exchanging messages via a concentrator processor and an L-bus, and the clock receiver 100 Multiplexer which receives 2048kbps of serial 8bit data from 32 input subhighways consisting of 32 time slots from time switch device using 8KHz clock and 8192KHz clock output from ), A voice memory unit 107 for storing the multiplexed subscriber telephone channel data output from the multiplexer 106, and the sound. The demultiplexer 108 demultiplexes the 8-bit parallel data stored and output in the sex memory unit 107 into 2048 kbps serial 8-bit data and transmits the demultiplexer 108 to the peripheral device through the processor matching unit 105 and the output subhighway. The 8-bit parallel data input from the processor matching unit 105 is converted into serial data using the frame synchronization signal output from the internal clock generation unit 101 and the 2048 KHz clock. The demultiplexer 108 The maintenance unit 102 converts the serial data outputted from the X-ray output into 8-bit parallel data and transmits it to the processor matching unit 105 to test the call path, and multi-writes to the voice memory 107. A control memory 104 for controlling the exchange of the subscriber telephone channel data between time slots, and an 8KHz clock and an 8192KHz clock outputted from the clock receiver 100 And an address generator 103 for generating a write address for writing data into the sex memory 107 and a read address for reading data from the control memory 104. Accordingly, the present invention can accommodate 512 regular telephone channel subscribers per subscriber concentrator as a time switch stage for performing a 4: 1 aggregation function.

Description

Subscriber Concentrator for Small Capacity Electronic Switching System

Since this is an open matter, no full text was included.

2 is a block diagram of a subscriber concentrator according to the present invention, FIG. 3 is a detailed block diagram of a clock receiver of FIG. 2, and FIG. 4 is a detailed block diagram of an internal clock generator of FIG.

Claims (11)

A clock receiver for receiving an 8KHz clock and an 8192KHz clock output from the time switch device, an internal clock generator for generating a frame synchronization signal and a 2048KHz clock by dividing the 8KHz clock and the 8192KHz clock output from the clock receiver; Processor matching unit for exchanging messages through device processor and L-bus, and 32 input subhighway consisting of 32 time slots from time switch device using 8KHz clock and 8192KHz clock output from the clock receiver. A multiplexer for receiving 2048 kbps serial 8-bit data and multiplexing the data into 8192 kbps parallel data; a voice memory unit for storing multiplexed subscriber telephone channel data output from the multiplexer; By demultiplexing bit parallel data into serial 8-bit data of 2048 kbps A demultiplexer which transmits to a peripheral device through a processor matching unit and an output sub highway, a frame synchronization signal output from the internal clock generator, and 8-bit parallel data input from the processor constant voltage unit by using a 2048 KHz clock. A maintenance unit which converts data and outputs serial data output from the demultiplexer into 8-bit parallel data and transmits the data to a processor matching unit to test a call path; and a subscriber telephone multi-write in the voice memory. A control memory for controlling the exchange of channel data between time slots, a write address for writing data to the voice memory using the 8KHz clock and 8192KHz clock output from the clock receiving section, and a read for reading the data of the control memory Useful to include an address generator for generating an address Before the subscriber concentrator of the electronic exchange The subscriber aggregation of the small-capacity electronic switchgear according to claim 1, wherein the clock receiver comprises an 8 KHz clock and an 8192 KHz clock outputted from the time switch device, and a TTL clock converter configured to convert the clock signal into a TTL level signal. Device The clock divider of claim 1, wherein the internal clock generator divides an 8KHz clock and an 8192KHz clock output from the clock receiver to generate an 8KHz frame synchronization clock, a 2048KHz clock, and a 4096KHz clock. Subscriber concentrator for small-capacity electronic switchgear comprising a latch unit for outputting a 2MHz clock and an 8KHz frame synchronization signal in synchronization with receiving an 8KHz frame synchronization clock and a 2048KHz clock and a 4096KHz clock 4. The subscriber concentrator of claim 3, wherein the latch unit comprises two flip flops. The apparatus of claim 1, wherein the maintenance unit 102 comprises a control signal generation unit for generating a control signal using an internal synchronization clock and a frame synchronization signal output from the internal clock generation unit, and the processor matching unit. A first latch unit for storing the output 8-bit data in accordance with a signal output from the address generator, and a synchronous output of data stored in the first latch unit in synchronization with a control signal output from the control signal generator. 1 PISO (Parallel In Serial Out) and SIPO (Serial In Parallel Out) to convert serial data output from the demultiplexer into parallel data in synchronization with the 2048 KHz clock output from the internal clock generator, Output data output from the SIPO from the address generator according to the control signal output from the control signal generator It is a small capacity of the entire electronic switching subscriber concentrator characterized in that the second latch part configured to output to the matching processor according to the signal 2. The apparatus of claim 1, wherein the address generator divides an 8KHz clock and an 8192KHz clock output from the clock receiver to generate a write address and outputs the write address to the voice memory unit, and 8KHz output from the clock receiver. A clock for frame synchronization is generated by combining a second division circuit unit for dividing a clock and an 8192 KHz clock to generate a read address and outputting the read address to a control memory unit, and a part of the read address signals among the read addresses output from the second division circuit unit; And a second decoder unit configured to receive and decode a write signal read signal and a clock signal output from the processor matching unit, and to transmit a control signal to the maintenance unit. Subscriber Concentrator for Small Capacity Electronic Switching System The read memory of claim 1, wherein the control memory unit receives a 10-bit address signal and a 16-bit data signal output from the processor matching unit, writes control data to a corresponding address through a left port, and outputs a read address from the address generator. And a latch memory for sequentially reading the data stored through the right port and receiving the data, and latching the data read from the control memory according to an 8192KHz clock output from the clock receiving unit and outputting the data to the voice memory unit. Subscriber concentrator for small-capacity electronic switchgear 2. The processor of claim 1, wherein the processor matching unit comprises: an address and data receiving unit for receiving an address and data from a concentrator processor of the small-capacity electronic switchgear and outputting the address and data to a control memory unit; A control signal receiver for receiving a control signal and outputting the control signal to the address generator, and latching data output from the address and data receiver in synchronization with the latch enable clock signal inputted from the address generator, and outputting the latched data to the control memory unit. Subscriber concentrator of small-capacity electronic switchgear, characterized in that consisting of a latch unit 2. The apparatus of claim 1, wherein the multiplexer comprises: a first line receiver for receiving subhighway data input through 16 sub highways from a subscriber receiving device, and a sub input via 8 sub highway ports from a time switch device; A second line receiver 801 for receiving highway data, a third line receiver for receiving sub highway data inputted from the demultiplexer via seven sub highway ports, an 8KHz clock and an 8192KHz clock outputted from the clock receiver; And a multiplexing circuit for converting data output from the first, second and third line receivers and data input from the maintenance unit through one sub highway into 8-bit parallel data of 8192 Kbps. Subscriber concentrator for small-capacity electronic switchgear The 8-bit subscriber telephone of claim 1, wherein the voice memory unit receives a write address outputted from the address generator, sequentially writes to the corresponding address through a left port, and is stored according to control data outputted from the control memory. And a latch unit for outputting data read from the voice memory to the demultiplexer according to a clock output from the clock receiver. The demultiplexer of claim 1, wherein the demultiplexer demultiplexes 8192kbps 8-bit parallel data output from the voice memory unit into 2048Kbps serial 8-bit data according to an 8KHz clock and an 8192KHz clock output from the clock generator. A first line driver for outputting data output from the 16 output ports of the output port of the demultiplexing circuit to the subscriber receiving apparatus through the 16 subhighways, and 8 outputs of the output ports of the demultiplexing circuit; A second line driver for outputting data output from the port to the time switch device through the eight sub highways, and data output from seven output ports of the output ports of the demultiplexing circuit through the one sub highway; Small capacity electronics exchange, characterized in that the third line driver outputs to the demultiplexer The subscriber concentrator