Half-duplex or full-duplex automode operation for use in data co
Handheld facsimile and alphanumeric message transceiver operatin
Handling incoming data/facsimile transmissions and voice calls i
Handy communication terminal
HDSL and POTS carrier system
Health support system
High capacity advanced 8YY mass calling event network...
High fidelity speech encoding for telecommunications systems
High impedance signal detection device
High speed digital data transmission over switched voice network
High speed modem
High-speed data communication over a residential telephone...
High-speed data communication over a residential telephone...
Home control system and interphone system
Home health care system
Home merchandise ordering telecommunications terminal
Home office communication system and method
Homeowner key for an electronic real estate lockbox system
Host computer digital signal processing system for communicating
Host computer digital signal processing system for communicating