Data communication apparatus having bandwidth selection capabili

Details Data communication apparatus having bandwidth selection capabili Data communication apparatus having bandwidth selection capabili

1990-07-18

1993-05-11

Richardson, Robert L.

Pulse or digital communications

Repeaters

Testing

375 8, 370 32, 358442, G06F 1300

Patent

active

052108260

ABSTRACT:
A data communication apparatus includes a command receiving unit for receiving a command for setting up a call; a discriminating unit for discriminating a bearer capability included in the command received by the command receiving unit; and a judging unit for judging if a modem is to be used or not, in accordance with a discrimination result by the discriminating unit.

REFERENCES:
patent: 4270202 (1981-05-01), Stuttard et al.
patent: 4353097 (1989-10-01), Takeda et al.
patent: 4774590 (1988-09-01), Haganuma et al.
patent: 4827349 (1989-05-01), Ogata et al.
patent: 4893305 (1990-01-01), Fernandez et al.
T. Okada, Proceedings of the IEEE International Conference on Communications (May, 1984) vol. 3, pp. 1389-1392.
J. L. Lavoisard, et al., Communication & Transmission (Sep., 1987) vol. 9, No. 3, pp. 35-50.
J. P. Delatore, et al., ISDN Data Networking Application in the Corporate Environment (Nov./Dec. 1988) vol. 67, No. 6, pp. 107-120.

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