KR100284409B1 - Subhighway Multiplexing and Demultiplexing Device for Electronic Switching System - Google Patents

Abstract

According to the present invention, a device capable of accommodating 2K capacity even with a single circuit pack in a time switch device is designed by designing a 64 subhighway multiplexing and demultiplexing circuit pack that is mounted and operated in an electronic switch. The present invention provides a 64 subhighway using a Z-PACK connector having a large number of terminals to multiplex and demultiplex the 64 subhighway, and connect the multiplexing / demultiplexing unit with the relay line and subscriber matching unit. The subhighway clock and the synchronous clock are distributed to the subhighway matching section, and the latch clock used for the multiplexing and demultiplexing functions can be monitored to accommodate 2K capacity.

Description

Subhighway Multiplexing and Demultiplexing Device for Electronic Switching System

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electrical exchanger, and more particularly, to a multiplexing / demultiplexing device for multiplexing and demultiplexing subhighways.

In general, an electronic switch is a device that replaces most of the electromechanical devices constituting the exchanger with electronic parts, and performs an exchange connection function between the sender and the receiver, and a charge and maintenance operation function.

The 32 subhighway multiplexing and demultiplexing apparatus of the conventional electronic switch is a time switch and multiplexing serial 8-bit data of 32 subhighway 1.024Mbps input from the subhighway matching section 20, as shown in FIG. Multiplexing / transmitting to the subhighway matching section 20 by demultiplexing the parallel 8-bit data of 8.192 Mbps, which is transmitted to the maintenance section 50 and the time slot exchange of the time switch and the maintenance section 50 has been performed. A demultiplexer 10; 32 sub-highway serial data input from the relay line and subscriber matching unit 40 is converted into a transistor-transistor logic (hereinafter, referred to as ″ TTL ″) signal and transmitted to the multiplexer / demultiplexer 10. And converting the demultiplexed TTL signal data of the multiplexer / demultiplexer 10 into 1.024 Mbps differential pulse code modulation (hereinafter, referred to as `` PCM '') data to match the relay line and the subscriber. A sub-highway matching unit 20 which transmits to the unit 40 and performs sub-highway matching with the relay line and subscriber matching unit 40; The local data link unit 60 receives the 8.196 MHz switching clock and the 8 KHz synchronous clock and supplies the multiplexing / demultiplexing unit 10 to the sub-highway clock and the synchronous clock in the time switch and maintenance unit 50. It consists of a clock receiver / distribution unit 30 for receiving and supplying to the sub-highway matching unit 20.

The operation of the conventional 32 subhighway multiplexing and demultiplexing apparatus configured as described above will be described in detail with reference to the accompanying drawings.

First, one subhighway consists of 32 channels. Thus, the subhighway matching unit 20 transmits data input at 32 subhighways 1.024 Mbps from the relay line and subscriber matching unit 40 to the multiplexing / demultiplexing unit 10 as 32 subhighways. Then, the multiplexing / demultiplexing unit 10 multiplexes 1.024Mbps serial 8-bit data according to the 8.196MHz switching clock FP2 and the 8KHz synchronous clock CP2 received from the clock receiving / distributing unit 30 to time switch and It transmits to the maintenance unit 50, and demultiplexes the 8.192 Mbps parallel 8-bit data in which the time switch and the time slot exchange of the maintenance unit 50 are exchanged, and transmits the data to the subhighway matching unit 20.

The clock receiving / distributing unit 30 receives the 8.196 MHz switching clock and the 8KHz synchronous clock from the local data link unit 60 and supplies it to the multiplexing / demultiplexing unit 10, and the time switch and maintenance unit 50. The sub-highway clock MCLK and the synchronization clock FS are received at the sub-highway matching unit 20. Then, the subhighway matching unit 20 converts the demultiplexed data of the multiplexing / demultiplexing unit 10 into discrete PCM data of 1.024 Mbps in the TTL signal and transmits it to the relay line and subscriber matching unit 40 through the 32 subhighways. Sub-way matching with the relay line and subscriber matching unit 40 is performed.

Here, the 32 subhighway multiplexing and demultiplexing devices mounted and operated in the conventional all-electronic exchange system are referred to as an Applicable Specific Intergated Circuit (hereinafter referred to as "ASIC"). 300-pin DIN connector is used. In addition, the circuit pack can accommodate eight 3 * 7 subhighway cables, each of which discretely accommodates a 4.096 MHz subhighway clock, an 8KHz synchronous clock, four multiplexed data lines, and four demultiplexed data lines, respectively. The relay line and the subscriber matching unit 40 are connected.

However, in the conventional apparatus, when multiplexing and demultiplexing channel data of 2K capacity, the multiplexing and demultiplexing circuit packs are composed of two pieces, and when the redundancy is implemented, two circuits each of two A and B sides are composed of four circuit packs. Due to the high power consumption and maintenance and management was difficult.

In addition, when designing a self- or half-self to improve the efficiency of the self-use, there was a problem that it is difficult to design the backboard to 1/2 self size.

Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to design a multiplexing and demultiplexing circuit pack mounted and operated in an all-electronic exchanger as a 64 subhighway multiplexing and demultiplexing circuit pack. Accordingly, the present invention provides a subhighway multiplexing and demultiplexing apparatus for an all-electronic exchange that can accommodate 2K capacity even with one circuit pack in a time switch device.

The subhighway multiplexing and demultiplexing apparatus of the all-electron exchanger according to the present invention for achieving the above object,

A multiplexing / demultiplexing unit for multiplexing and demultiplexing 64 subhighways; A subhighway matching unit connecting the multiplexing / demultiplexing unit to the relay line and the subscriber matching unit; When the reception clock obtained from the local data link unit is supplied to the multiplexing / demultiplexing unit, the subhighway clock and the synchronization clock are received from the time switch and the maintenance unit and distributed to the subhighway matching unit, and the multiplexing and demultiplexing function is performed. The technical configuration features a clock receiving / distributing and clock monitoring unit for monitoring the latch clock used.

1 is a block diagram of a 32 subhighway multiplexing and demultiplexing apparatus of a conventional all-electronic switching system

Figure 2 is a block diagram of a 64 subhighway multiplexing and demultiplexing apparatus of the electronic switch according to the present invention.

<Explanation of symbols for main parts of drawing>

100: multiplexer / demultiplexer 101: multiplexer

102: transmission latch unit 103: reception latch unit

104: demultiplexer 200: sub highway matching unit

201: subhighway input unit 202: subhighway output unit

300: clock reception / distribution and clock monitor 301: clock reception / distribution

302: clock monitoring and alarm sending unit 400: relay line and subscriber matching unit

500: time switch and maintenance unit 600: local data link unit

Hereinafter, an embodiment according to the technical idea of the subhighway multiplexing and demultiplexing apparatus of the electro-electric switch of the present invention configured as described above will be described in detail.

Fig. 2 is a block diagram of a 64 subhighway multiplexing and demultiplexing apparatus of an all-electronic exchange according to the present invention.

As shown therein, a multiplexing / demultiplexing unit 100 for multiplexing and demultiplexing 64 subhighways; A subhighway matching unit 200 for connecting the multiplexing / demultiplexing unit 100 to the relay line and the subscriber matching unit 400; The reception clock obtained from the local data link unit 600 is supplied to the multiplexer / demultiplexer 100, the sub-highway clock and the synchronization clock are received from the time switch and maintenance unit 500, and the sub-highway matching unit ( And a clock reception / distribution and clock monitoring unit 300 for monitoring the latch clock used when performing the multiplexing and demultiplexing functions.

The multiplexer / demultiplexer 100 includes: a multiplexer 101 for multiplexing 64 subhighways; A transmission latch unit 102 for latching data transmitted from the multiplexing unit 101 and delivering the latched data; A reception latch unit 103 for latching received data transmitted from the time switch and the maintenance unit 500; The demultiplexer 104 demultiplexes the 64 subhighways latched by the receive latch 103.

The subhighway matching unit 200 receives the 64 subhighways transmitted from the relay line and the subscriber matching unit 400, converts the subhighway into a TTL signal, and transmits the subhighway inputting unit 100 to the multiplexing / demultiplexing unit 100. 201); The TTL signal received from the multiplexer / demultiplexer 100 and the subhighway clock and the synchronous clock received from the clock receiver / distributor 301 are converted into RS-422 signals to the relay line and the subscriber matcher 400. Sub-highway output section 202 for transmitting.

The clock receiving / distributing and clock monitoring unit 300 receives the switching clock and the synchronous clock transmitted from the local data link unit 600 and transmits the received clock to the multiplexing / demultiplexing unit 100, the time switch and A clock receiver / distributor 301 which receives the subhighway clock and the synchronous clock from the maintenance unit 500 and distributes the subhighway clock and the synchronization clock to the subhighway matching unit 200; It consists of a clock monitoring and alarm sending unit 302 for monitoring the latch clock used in the multiplexing and demultiplexing of the multiplexing / demultiplexing unit 100.

The operation of the subhighway multiplexing and demultiplexing apparatus of the electronic switching system according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, data received from the relay line and the subscriber matching unit 400 at 2.048 Mbps through the 64 subhighways is received by the subhighway input unit 201 of the subhighway matching unit 200, and the 2K channel of the 64 subhighway (= 64 Subhighway * 32 channels) to the multiplexer 101 of the multiplexer / demultiplexer 100. Then, the multiplexer 101 multiplexes the serial 8-bit data of 2.048 Mbps according to the switching clock FP2 of 16.384 MHz and the synchronous clock CP2 of 8 KHz received from the clock receiving / distributing unit 301 and transmits the transmission latch unit ( 102 is transmitted to the time switch and maintenance unit (50). 16.384 Mbps of parallel 8-bit data, in which the timeslots of the time switch and the maintenance unit 500 have been exchanged, is inputted to the demultiplexer 104 through the receiving latch 103 and demultiplexed, followed by 2K of 64 subhighways. The channel is transmitted to the subhighway matching unit 20.

The clock receiver / distributor 301 of the clock receiver / distributor and clock monitor 300 receives a 16.384 MHz switching clock and an 8KHz synchronous clock from the local data link unit 600 to perform multiplexing / demultiplexer 100. It is supplied to the multiplexer 101 and the demultiplexer 104, and receives the subhighway clock MCLK and the synchronous clock FS from the time switch and maintenance unit 500 to receive the subhighway matching unit 200. Supply to the highway output unit 202. Then, the subhighway output unit 202 converts the demultiplexed data of the demultiplexer 104 into 2.048 Mbps discrete PCM data in the TTL signal and transmits the demultiplexed data to the relay line and subscriber matching unit 400 through the 64 subhighway channels. Sub-highway matching is performed with the relay line and the subscriber matching unit 400.

Here, the 2K channel capacity multiplexing and demultiplexing circuit packs, which perform the 64 subhighway multiplexing and demultiplexing functions, can be reduced to 2 pieces from the conventional 2 pieces, so that each of the A and B sides can be operated by 2 sheets each. It is possible to design a time switch device with a capacity of 2K. The 2K multiplexing ASIC and the 2K demultiplexing ASIC are implemented as a field programmable gate array (hereinafter abbreviated as "FPGA") to handle 64 subhighways.

A 4.096 MHz subhighway clock, an 8KHz synchronous clock, four multiplexed data lines, and four demultiplexed data lines were used to connect the trunk line and the subscriber, and to cover 16 subhighway cables, each of which was discretely accommodated. The matching function with the time switch device processor is eliminated by using a Z-PACK connector that can accommodate up to 525 pins in the circuit pack size of the conventional electronic switch 32 subhighway multiplexing and demultiplexing devices. When the multiplexing and demultiplexing functions are performed, the clock used as the latch clock is monitored to determine whether the circuit pack is faulty. A synchronization signal, a redundant signal, and the like are received.

By using the 64 subhighway multiplexing and demultiplexing circuit packs as described above, 2K capacity can be accommodated in one circuit pack in the time switch device.

As described above, the subhighway multiplexing and demultiplexing apparatus of the all-electronic exchange according to the present invention uses a device for multiplexing 32 subhighways in a time switch device for time-switching a 2K capacity time slot in a conventional self. The circuit pack that performs the multiplexing and demultiplexing functions is redesigned as a device that multiplexes and demultiplexes the 64 subhighways, and by using a Z-PACK connector with a large number of terminals, a multipack and a demultiplexing circuit pack that accommodates 64 subhighways can be implemented. It can be effective.

In addition, 2K time slots can be processed in a single multiplexing and demultiplexing circuit pack, so that the efficiency can be more than doubled compared to a conventional two-sheet multiplexing and demultiplexing circuit pack. There is also an effect that can be configured to 1/2 self.

Claims (4)

A multiplexing / demultiplexing unit for multiplexing and demultiplexing 64 subhighways; A subhighway matching unit connecting the multiplexing / demultiplexing unit to the relay line and the subscriber matching unit; When the reception clock obtained from the local data link unit is supplied to the multiplexing / demultiplexing unit, the subhighway clock and the synchronization clock are received from the time switch and the maintenance unit and distributed to the subhighway matching unit, and the multiplexing and demultiplexing function is performed. A subhighway multiplexing and demultiplexing apparatus for an electronic switching system, comprising a clock reception / distribution and clock monitoring unit for monitoring a latch clock used. The method of claim 1, wherein the multiplexing / demultiplexing unit, A multiplexer for multiplexing 64 subhighways; A transmission latch unit for latching data transmitted from the multiplexer and transferring the latched data to the time switch and the maintenance unit; A reception latch unit for latching reception data transmitted from the time switch and the maintenance unit; And a demultiplexer configured to demultiplex the 64 subhighways latched by the receiving latch unit. The method of claim 1, wherein the subhighway matching unit, A sub-highway input unit which receives 64 sub-highways transmitted from the relay line and subscriber matching unit, converts the sub-highway into a transistor-transistor-logical signal and transmits the sub-highway to the multiplexer / demultiplexer; Translating the transistor-transistor-logic signal received from the multiplexer / demultiplexer and the sub-highway clock and the synchronous clock received from the clock receiver / distributor into RS-422 signals for transmission to the relay line and subscriber matching unit. Sub-highway multiplexing and demultiplexing apparatus of the electronic switch, characterized in that the sub-highway output portion. According to claim 1, wherein the clock reception / distribution and clock monitoring unit, A clock that receives a switching clock and a synchronous clock transmitted from the local data link unit and transmits it to the multiplexing / demultiplexing unit, and receives a subhighway clock and a synchronous clock from the time switch and maintenance unit and distributes them to the subhighway matching unit. Receiving / distributing unit; Sub-highway multiplexing and demultiplexing apparatus of the electronic switchboard, characterized in that consisting of a clock monitoring and alarm for monitoring the latch clock used in the multiplexing and demultiplexing of the multiplexing / demultiplexing unit.

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