H - Electricity – 04 – Q
Patent
H - Electricity
04
Q
340/90
H04Q 5/00 (2006.01) H04Q 9/00 (2006.01) H04Q 9/14 (2006.01)
Patent
CA 1079829
MULTIPOINT POLLING TECHNIQUE Abstract of the Disclosure A multipoint polling system wherein a multipoint switch selectively connects a plurality of remote terminals to a central station in response to remote terminal addresses transmitted on a signaling path to the multipoint switch. Polling apparatus stores portions of a remote terminal address list provided by the central station and transmits individual ones of the stored remote terminal addresses on to the signaling path. The polling apparatus periodically requests different portions of the remote terminal address list and replaces the stored remote terminal address portion with the requested remote terminal address portion. The multipoint switch is advantageously comprised of a plurality of sections with each section of the switch responsive to a portion of the address list for establishing a signaling path between the central station and selected ones of the remote terminals defined by the address list portions. The failure of a multipoint switch section to respond to remote terminal addresses results in the address list portion normally transmitted to the failed section and the address list portion normally transmitted to a remaining active section being transmitted to the active section whereby the active section polls the remote terminals previously polled by both the failed and active sections.
292057
Napolitano Orlando
Reid Robert E.
Saltzberg Burton R.
Stochel Nathan H.
Tingley John R.
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