Cellular telephone system that uses position of a mobile unit to
Cellular telephone system that uses position of a mobile unit to
Cellular telephone unit having multiple memory location command
Cellular telephone with audio recording subsystem
Centralized feature platform in a packetized network
Centralized message service apparatus and method
Change speed of voicemail playback depending on context
Changing-urgency-dependent message or call delivery
Channel changing system
Channel selecting cordless telephone
Channel selection in a multichannel access radio communication s
Circuit and method for detecting error causing tones in a voice
Circular memory addressing option for audio messages
Cleaning system for telephone number list
Clerk paging system
Closed-loop command and response system for automatic...
Coalescence of voice mail systems
Coin telephone message and management system
Combination telephone and voice-mail transceiver
Common gateway to call control systems