Communications Network Bridge

摘要

A bridge for linking a first communications network 1 to a second communications network 2, the bridge comprising a first bridge module 11 linked to the first communications network and a second bridge module 21 linked to the second communications network. The first bridge module is linked to the second bridge module by only an analog audio link 14 and a General Purpose Input Output call negotiation signalling link 15 such that generic digital data cannot effectively pass between the first communications network and the second communications network through the bridge elements. There is also provided a network terminal 13 for connection to a network connected to the bridge and communications system comprising the bridge and first communications network.