发明公开
EP0105212A3 Circuit arrangement for the transmission of signals between subscriber lines and at least one transmission line of a services integrated communication centre 失效
服务集成通信中心的用户线和至少一个传输线之间的信号传输的电路布置

Circuit arrangement for the transmission of signals between subscriber lines and at least one transmission line of a services integrated communication centre
信息查询
0/0