ISDN terminal adapter for use with external modem and employing

Details ISDN terminal adapter for use with external modem and employing ISDN terminal adapter for use with external modem and employing

1997-09-04

1999-05-11

Patel, Ajit

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

370463, H04J3/12

Patent

active

059035722

ABSTRACT:
An ISDN terminal adapter is capable of providing both digital and analog communication connectivity between a customer's data terminal equipment (DTE) and a digital communication link. The adapter includes a digital (ISDN) communication transceiver for transmitting and receiving digital communication signals on the ISDN link. A first digital communication connector is coupled with the DTE. A second digital communication connector is coupled with the customer's modem. An analog communication connector is coupled with an analog port of the modem. An analog/digital communication interface is coupled between the analog communication connector and the digital communication transceiver. A serial communication exchange processor is coupled with the first and second digital communication connectors and the transceiver. For all-digital (ISDN) connectivity, the processor provides a first communication path, exclusive of the modem, between the first digital communication connector and the transceiver, so that digitally formatted communication may take place between the DTE and the ISDN link. For digital-analog connectivity, the processor provides a second communication path that makes use of the customer's external modem, between the first digital communication connector and the transceiver, for communications between the DTE and the ISDN link.

REFERENCES:
patent: 5305312 (1994-04-01), Fornek et al.
patent: 5404491 (1995-04-01), Huzenlaub
patent: 5450412 (1995-09-01), Takebayashi et al.
patent: 5483530 (1996-01-01), Davis et al.

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