Advanced intelligent network (AIN) functionality for electronic
Alarm mechanism
Alarm system backup
Alerting device for telephones
Apparatus and method for automatically returning a telephone set
Apparatus and method for identifying and analyzing telephone cha
Apparatus and method for monitoring performance of an...
Apparatus for use with key telephone systems
Call detail reporting for lawful surveillance
Call-content determinative selection of interception access...
Cellular alarm backup system
Cellular alarm backup system
Cellular radiotelephone diagnostic system
Cellular radiotelephone diagnostic system
Common channel signalling communication monitoring system
Common channeling signaling network maintenance and testing
Communication terminal equipment
Data preparation for traffic track usage measurement
Database driven methods and systems for real time call tracing
Device for indirectly forwarding messages in data and/or...