Apparatus for interfacing analog telephones and digital data ter

Details Apparatus for interfacing analog telephones and digital data ter Apparatus for interfacing analog telephones and digital data ter

1992-02-07

1994-04-19

Safourek, Benedict V.

Multiplex communications

Wide area network

Packet switching

370 79, 3701101, 379 88, 379 93, H04J 312, H04Q 1104

Patent

active

053053125

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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patent: 5067125 (1991-11-01), Tsuchida
patent: 5113396 (1992-05-01), Kagami
patent: 5134611 (1992-07-01), Steinka et al.

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