Maintenance processing apparatus for remote port units in a...

Details Maintenance processing apparatus for remote port units in a... Maintenance processing apparatus for remote port units in a...

H - Electricity

04

Q

344/1, 344/29

H04Q 1/20 (2006.01) H04M 7/14 (2006.01)

Patent

CA 1173942

G17-017 ABSTRACT A telephony network with a digital central office and one or more remotely located digital satellite units. Each digital satellite unit connects to a number of remote subscriber lines and monitors these lines to establish communications through interconnecting spans and a digital satellite interface at the digital central office. The digital satellite interface includes a programmed controller that communicates with the remote digital satellite units connected to it, with call processing equipment in the digital central office and with maintenance processing equipment in the digital central office. Communications with the maintenance processor are in the form of messages having a header byte and a byte indicating the length of the message. During network initialization and various recovery operations, the programs and/or the data base can be transferred from the maintenance processor to each digital satellite interface through the use of these messages.

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