通信专业实务1（Communication practice 1）.docVIP

通信专业实务1（Communication practice 1） Professional practice 1.txt yesterday was an invalid check; tomorrow is an outstanding promissory note; cash is the only cash that can be cashed at any time. People always love to deceive ourselves, because it more easily than to deceive others. This article is contributed by raynumdo DOC documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view. Communications professional practice A RadioButtonList, 1, the structure of Chinas long-distance network at this stage (two two) two 2 level structure, frame relay (using statistical multiplexing, applicable to all kinds of unexpected data service users. Statistical multiplexing) multiplexing 1 Internet IP layer belonging to the architecture of TCP/IP (3) network layer network, mobile IP technology refers to processing (cellular mobile cellular mobile cellular mobile telephone call) principle 4, signaling transmission between users online user terminal to exchange all can be classified into (subscriber line signaling (subscriber line signaling) the basic functional structure of 5,7 signaling system by MTP and (UP UP UP 6,7) is composed of two signaling system in SCCP (signaling connection control signalling connection control part) signaling connection control part 7, from the timing device clock node in use (PLL PLL) the The clock frequency node locked in frequency reference clock source. PLL 8, GPS is the U.S. Naval Observatory set up a set of high precision satellite global positioning system, it provides the signal to the time (UTC UTC) tracking UTC 9, the composition of TMN can be divided into (three level three level three level 10), base station subsystem (BSS BSS) can be divided into (BSC) and BTS two functional entities. BSS (11 TD-SCDMA, a carrier bandwidth for (1.6MHz) 1.6MHz) 1.6MHz). 12, using the intelligent network (No.7 signaling No.7 signaling exchange between the layer and the business