H - Electricity – 04 – L
Patent
H - Electricity
04
L
340/168
H04L 25/00 (2006.01) H04B 17/02 (2006.01)
Patent
CA 1230654
SUPERVISORY CONTROL NETWORK PROTOCOL FOR COMMUNICATION SYSTEM Abstract of the Disclosure A supervisory control network protocol for transmitting either solicited or unsolicited status messages on a single channel network so that either no overlap between messages occurs, or if it does the message from the upstream station is blocked so that it does not result in a garbled message being communicated downstream. To avoid overlap between solicited and unsolicited messages each transmission of a solicited message signal is preceded by an inhibit signal having a bit length at least equal to that of the unsolicited message signal. Once the inhibit signal is received at a station, it cannot initiate an unsolicited message of its own. - i -
480133
Mowle John E.
Nortel Networks Limited
LandOfFree
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