Ensemble modem structure for imperfect transmission media
Entrance communication system
Entry door answering telephone system
Entry of alphabetical characters into a telephone system using a
Entry phone apparatus and method with improved alphabetical...
Equipment for facsimile call service of telephone exchange
Error correction and compression parameter exchange during...
Escape sequence using monitoring of control signal states
Establishment of facsimile calls
Ever ready telephonic answering-machine for receiving and delive
Exchange for an ISDN capable of controlling an incoming call by
Expanded telephone data organization system
Expansion subsystem for use in a communication system
Extension device for telephone
External bilateral telephone interface remote control system
External device interface for an electronic telephone
Facility for tying a door intercommunication system with a video
Facsimile and voice communications interface device
Facsimile apparatus
Facsimile apparatus