Apparatus and method for a digital data communications device to

Details Apparatus and method for a digital data communications device to Apparatus and method for a digital data communications device to

1995-03-21

1997-01-28

Marcelo, Melvin

Telephonic communications

Telephone line or system combined with diverse electrical...

Having transmission of a digital message signal over a...

39518202, 370385, H04L 122

Patent

active

055984010

ABSTRACT:
An apparatus and method for a data communications device to selectively operate in a plurality of analog and digital modes, including as an analog modem, as a digital modem, and as a terminal adapter. The embodiments provide for a single, integrated data communications device to be configured and also subsequently reconfigured to provide for data communications over a variety of networks, including public switched telephone networks, leased line, and digital networks, including T1, E1 and ISDN. The various embodiments further provide for the selection of a primary digital operating mode while simultaneously providing for automatic reconfiguration for an auxiliary or back-up analog operating mode. The various embodiments also provide for signal simulation of the various networks, such that the actual coupled network is transparent to a data terminal transferring information through the data communication device to the network.

REFERENCES:
patent: 5210740 (1993-05-01), Anzai et al.
patent: 5406564 (1995-04-01), Okita
patent: 5442622 (1995-08-01), Hokari
patent: 5483519 (1996-01-01), Satomi et al.
patent: 5490135 (1996-02-01), Hiraiwa et al.

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