Transmission Network And Bearer Service

Because help the fast development of jinan, once constucted of the network using of resource changes of severity not and all, already biggest influenced help the market of jinan develop a request, if handle not and as soon as possible will give help the jinan telecom CO.ltd result in deathblow. But if re- constuct a new net will result in not only a great deal of waste of resources, and constuct a period will change of very endless, this ising to help the jinan telecom CO.ltd can't accept.But the progress with mere communication, maturity and advance of SDH technology, make it used widely in the access network finally to the relaying network from the long-distance network progressively. The transmission network is that the business storey includes supporting the platform on storey, and SDH technology is the soul of this platform. Among access network, for satisfy group flexibility and to mix in real time circuit of network, SDH technology applied to user's end and office end extensively, protects the function and offers the security for " the last kilometer " with the complete ring. From present's view, both PSTN network and base station moved is transmitted, the transmission system of the access network still relies mainly on offering TDM business to transmit. From a different perspective, after beginning to bear the transmission subject apparatus of the access network of optic fibre from the access network built-in SDH155, the speed can not already meet access network's of the narrowband demands at present, users need improving the bandwidth of transmitting badly. Connect and start with section for a large amount of satisfied many kinds of broadband business and broadband introduced at the same time, it is very necessary to raise the transfer rate that the access network is transmitted, improve the efficiency of transmitting, construct the land of city of new generation / many business transmission platform of access network. Though the access technology that the access network adopts is varied, the user's needs are various, network structure is changeful, but need a transmission network with high dependability to bear the weight of all the time. SDH network resume ability and prolong with strong protection their performance land will occupy the absolute leading status of the network in city when the a fixed one. Certainly, the diversification of the network business, give city land transmission net to propose...