Apparatus for interfacing analog telephones and digital data terminals to an ISDN line
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United States of America Patent
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Apr 19, 1994
Grant Date -
N/A
app pub date -
Feb 7, 1992
filing date -
Feb 7, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An interface to an integrated service, digital network (ISDN) line for up to two analog dual tone, multifrequency telephones and up to four personal computers or data terminals. A stored program-controlled processor controls access to the ISDN line for the analog and digital interface circuits. The processor also provides access to switch-controlled ISDN features for the analog telephones (e.g., call waiting, call hold, etc.).
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