TC-CCR014 97321174-A01 | HONEYWELL | Circuit Interconnection in SDH Networks

Description

TC-CCR014 97321174-A01 | HONEYWELL | Circuit Interconnection in SDH Networks

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Taking the networking of one central station and two substations as an example, the main station equipment of the central station is interconnected with the terminal equipment of the substation through the E1 circuit of the SDH network. TC-CCR014 97321174-A01 assumes that each substation needs to access 4 channels of low-speed data, occupying 1-4 time slots of their respective E1 circuits. The 2 E1 signals are transmitted to the central station through the SDH network. In order to merge the 1-4 time slots already used in the 2 E1 signals into one E1 circuit, the central station needs to be equipped with a time slot scheduling device (DDN device). The E1 circuit, which has been merged through time slots, is directly connected from the communication room to the new serial port server in the automation room. Upward direction:

The new serial port server extracts the effective time slots from the E1 signal and packages them into a standard IP packet to send to the front-end processor. The TC-CCR014 97321174-A01 packet contains the corresponding time slot number. Downward direction: The new serial port server receives IP packets sent by the front-end machine and inserts the data in the IP packet into the corresponding E1 time slot according to the slot number in the IP packet. A low-speed data insertion E1 signal 64K time slot conversion device needs to be added to the substation end, and for substations with existing PCM installations, the existing RS232/RS422 plug-in board can be used.

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