Design And Realization Of General Office Signaling Transceiver

In recent years, the communication system of our country develops rapidly, and the comparatively complete telephone switch network has been set up. Among telephone network, the control rule of using to establish, keep and release communication relation, finish communication function is called signaling mode (signaling way), it is an essential signal to accomplish telephone exchange, and, it is the nerve centre of telephone switch network. That telephone network takes what kind of signaling mode, is closely related to the exchange control technology that exchange office adopts. With the exchange technology developing fromstep-by-step system to crossbar system then to programmed system, signaling system develops from channel associated signaling (CAS) to common channel signaling (CCS). Our country present telephone network is mixed by digital mode and analogy mode, so our country present signaling system is at the stage of CAS and CCS commixture. As the communication network of the telephone develops to intelligent and digitization, the transition from CAS to CCS of our country telephone network must be solved progressively.To above-mentioned problem, author designed and realized a general telephone exchange office signaling transceiver. It makes layer structure of CCS (No.7 signaling system) apply to CAS (China No. 1 signaling system), offers a clear signaling transmission channel for telephone exchange system. Under the condition of not changing any original hardware resource, the device realizes smooth transition for exchange system from No.l signaling to No.7 signaling, which not only economizes cost, but also offers a flexible way for system disposition.This thesis further investigated signaling receiving and sending process, No.7 signaling system and its key technology. On the basis of analyzing the technology of all digital programmed private branch exchange, put forward the design plan of general telephone signaling transceiver, designed and realized the key part of the signaling transceiver system - signaling call flow.The transceiver passed actual usage testing, the test result indicated that the system is low-cost and high reliability, its all technique performance indexes come up to ITU recommendation and country standard.