Data transmission/reception apparatus

Details Data transmission/reception apparatus Data transmission/reception apparatus

1988-02-29

1990-01-30

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 31, H04L 516

Patent

active

048978310

ABSTRACT:
A data communication apparatus includes a data communication section for preforming data communication according to full duplex communication, a testing section for performing a communication test prior to the data communication, and a transmission controller for determining whether full duplex communication can be performed during a period of the communication test performed by the testing section. The testing section includes a backward signal generator, a backward signal detector, and a control signal analyzer. The backward signal generator and the backward signal detector may be replaced with an echo canceller.

REFERENCES:
patent: 3956589 (1976-05-01), Weathers et al.
patent: 4351059 (1982-09-01), Gregoire et al.
patent: 4653044 (1987-03-01), Kudo

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