Communication device and access network device
Communication line test apparatus for a mobile radio system
Communication lines with terminate and leave capability-VF data
Communication network cut-off detection arrangement
Communication network signalling system link monitor and test un
Communication state management system and method in an intellige
Communication system and a method, to detect a power exposure of
Communication terminal equipment
Communication terminal having functions of detecting and prevent
Communications channel testing arrangement
Communications devices including test circuits and related...
Communications line testing
Communications link testing
Communications system having a host exchange and a mate exchange
Communications test system
Communications test system
Compact telephone line test apparatus
Composite ringing and coin control voltage detector and method
Computer controlled test facility for a telecommunication switch
Computer-executable method for diagnosing trouble causes in...