Adjusting data transmission rate based on received signal qualit

Details Adjusting data transmission rate based on received signal qualit Adjusting data transmission rate based on received signal qualit

1984-03-05

1986-08-12

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 58, 370 84, H04J 322

Patent

active

046060448

ABSTRACT:
A data transmission control system for allowing remote transceiver stations to transmit data via a telephone line or like analog transmission line through modems. When transmit and receive stations have been interconnected by a call, a training sequence for the modem is executed and, also, a test signal transmission sequence is effected to set up a data transmission rate before delivery of information. When the receive station has received test training data inclusive of a plurality of transmission rates from the transmit station, the function of the modem at the receive station is checked with respect to each of the transmission rates on a signal space diagram, thereby determining whether the receive station is capable of normally receiving data at the transmission rate. Training on the transmission rates which a modem can use is executed satisfying a predetermined protocol and without increasing the protocol time.

REFERENCES:
patent: 3536840 (1970-10-01), Sullivan
patent: 3988539 (1976-10-01), Motley et al.
patent: 4153916 (1979-05-01), Miwa et al.

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