Establishing and supporting data traffic in private branch exchanges
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United States of America Patent
Stats
-
Dec 11, 1984
Grant Date -
N/A
app pub date -
Mar 30, 1982
filing date -
Mar 30, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Apparatus for facilitating the transport and switching of synchronous and asynchronous digital data signals presented by data terminal or data communication equipments to a voice switching network such as a PBX advantageously without the use of modems. The clock rate of the PBX user's digital data is multiplied by a variable factor to define a synchronous transmission clock rate on a data link between a pair of interfaces, one locally connecting to the data terminal or data communications equipment and the other appearing as a port of the PBX switching equipment. The higher rate on the data link permits both the digital data as well as a control channel to be provided. Variations in the data terminal or data communications equipment clock rate do not affect the control channel. Variations in the voice sampling rate of switching modules serving different groups of ports through which the digital data is transported are accommodated.
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