POWER LINE TELEPHONE COMMUNICATIONS SYSTEM HAVING ON HOOK DIGITAL VOICEBAND MESSAGING

摘要

A power line telephone communications system having an ON HOOK digital voiceband messaging feature by which selected information contained in an incoming call to a telephone is received prior to the telephone being lifted off its hook. The incoming ring signals, ON HOOK digital voiceband messaging and information signals are conducted by a base unit to the power line for transmission to an extension unit to which a telephone is connected.