1, change serial code to parallel code (8 bits).
2. Four pcm channels are merged, that is, four serial 2mbps voice signals are converted into 256kbps parallel voice signals after serial/parallel conversion respectively.
3. Multiplex it into a parallel code of 1mbps and send it to the voice memory of Class T connector. At present, all Fuan devices adopt multi-wire terminators, FA+ and FA- are connected to the DC screen, and OUT 1 and OUT2 control external devices, which can output 24V after operation, and FK 1 and FK2 receive passive feedback.
4. When the input module of GST-LD-8319 is connected in series with the non-coding detector, the base of the detector should be connected with diode 1N58 19, and the output loop terminal must be connected with GST-LD-8320 or GST-LD-8320A terminator, which can be used as the base of the detector.