公开(公告)号：EP0843948A1

公开(公告)日：1998-05-27

申请号：EP97925162.0

申请日：1997-06-09

申请人： GPT LIMITED

发明人： FORTIER, John, Douglas ,  WILLIAMS, Howard

IPC分类号： H04Q3 ,  H04J11 ,  H04Q11

CPC分类号： H04Q11/0471 ,  H04J2203/005 ,  H04Q11/0478

摘要： A telecommunications system has broadband digital subscriber loop circuitry at each end of a link and is arranged to transmit telephony signals by digitising them and carrying them within the DSL signals whereby, in the event of failure of one of the DSL circuits or its associated power supply, the telephony signal is automatically switched to bypass to DSL circuits.