To this end, the requirements of the telephone service, the datatransmissionservice and the signalling network management, in particular, were investigated.
为此，专门调查了电话业务、数据传输业务和信令网络管理的要求。
2
In order to provide reliable datatransmissionservice on disturbed channels, a modified Go-Back-N ARQ protocol is used to retransmit data by a communication gateway.
The real-time datatransmissionservice is an important service in the MSTP of deep-sea measuring ship, is also a weak link, which restricts the full use of transmission platform in measuring ship.