messages of characters 文字报
two-way voice conversation 双向对话
X.21 protocols X.21协议
coaxial tree network 同轴数状网络
community antenna TV network 公用天线的电视网络
direct broadcast system 直接广播系统
Ethernet 以太网
token bus and token ring network 令牌总线网和令牌环网
word-wide independent networks 全球范围的独立网络
resource pooling 资源共享
peak hour traffic 繁忙小时流量
integration of narrow-band services窄带业务的综合
the progress in speech coding and chip technology 在语声编码和芯片技术方面的进步
a new teleservice 新的电信业务
adapting to new service requirements对新业务要求的适配
optimal statistical sharing of the resources 资源最佳统计式的共享 |
