Microprogrammed unit for a data set incorporating a modem...

Details Microprogrammed unit for a data set incorporating a modem... Microprogrammed unit for a data set incorporating a modem...

G - Physics

06

F

354/235

G06F 3/00 (2006.01) H04L 27/00 (2006.01)

Patent

CA 1106977

ABSTRACT OF THE DISCLOSURE The invention provides data sets for connecting a data terminal to an exchange of data network using ordinary telephone lines and links, the sets being used at either end of the line or link and comprising interface and modem functions implemented by a unit comprising a processing unit, which processes, organises, modulates and demodulates incoming and outgoing signals under the control of a control unit providing instructions from a stored program in response to timing signals provided by a timing unit. At the exchange end of the line the timing unit is slaved to the exchange clock, and at the data terminal the timing unit is phase and frequency locked to synchronizing signals received from the exchange.

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