Dual signal triggered message waiting notification system for indicating storage of different types of messages awaiting retrieval
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United States of America Patent
Stats
-
Sep 1, 1998
Grant Date -
N/A
app pub date -
Nov 30, 1994
filing date -
Nov 30, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A message waiting notification system comprising a telephone provider's off premise central switching office connected to a Dual Signal Triggered Message Waiting Indicator (DSTMWI) circuit via a telephone line is disclosed. The central switching office transmits predetermined asynchronous Frequency Shift Keying (FSK) signals and/or audible tones indicating different types of electronically stored communication messages awaiting retrieval, such as voice mail, E-mail, fax mail and video mail. Responsive to receiving the FSK signals and/or audible tones from the central switching office via the telephone line, the DSTMWI circuit provides visual notification of any combination of different types of the electronically stored communication messages.
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