Multiplex communications – Wide area network – Packet switching
Patent
1993-10-25
1996-07-09
Chin, Wellington
Multiplex communications
Wide area network
Packet switching
370 81, 370118, 3701101, 375222, H04J 312
Patent
active
055352049
ABSTRACT:
The voice over data component of a personal communications system enables the operator to simultaneously transmit voice and data communication to a remote site. This voice over data function dynamically allocates data bandwidth over the telephone line depending on the demands of the voice grade digitized signal. The user may enter voice over data mode from a data transfer mode by lifting the handset of the telephone connected to the modem. The off-hook condition is sensed and software sends a supervisory packet to the remote site to invoke voice-over-data mode. The remote telephone will simulate a ring to alert the remote user, and the local telephone will simulate a ringback to inform the caller that the remote unit is responding.
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Chin Wellington
Multi-Tech Systems, Inc.
Nguyen Chau T.
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