Based on these excellences, user bring out network supporting Signaling System 7, achieving integrated multiplexequipment connecting PSTN and so on.
基于七号信令的上述优点，用户提出采用此信令实现综合复分接设备接入公众电话网等支持七号信令的网络。
2
Manufacture methods, some attentive questions during design and use conditions of the multiplexequipment of carbon steel with PTFE liner are introduced.
介绍了钢衬聚四氟乙烯设备的加工方法，设计中需要注意的问题，以及在湿氟、湿氯环境下的使用情况。
3
About multiplex channel, a large number of problems frequently happened in protection cooperating between channel and diplex equipment.