Distribution device in a data signal processing...
Distribution device in a data signal processing...
Door answering machine
Door message apparatus with telephone answering device
DOS compatible dictation and voice mail system
DOS-based card-type voice mail system
DPNSS VRU with single channel transfer
Drive mechanism for a two-tape telephone answering machine using
DTMF signal detection apparatus
DTMF signal discriminating circuit
Dynamic allocation of roamer routing numbers system and method
Dynamic allocation of voice ports and menu options in an...
Dynamic call processing control
Dynamic channel assignment in a communication system
Dynamic control of voice mail delivery sequence
Dynamic interactive voice architecture
Dynamic interactive voice architecture
Dynamic interactive voice interface
Dynamic message-mailbox size variation
Dynamic pricing method and apparatus for communication systems