Data transmission with improved message format

Details Data transmission with improved message format Data transmission with improved message format

H - Electricity

04

L

340/95

H04L 12/40 (2006.01) H04L 29/06 (2006.01)

Patent

CA 1332455

- 17 - DATA TRANSMISSION WITH IMPROVED MESSAGE FORMAT Abstract In a voiceband data multipoint network, each tributary modem transmits, in a trailer which follows the user data, a tributary modem identification, a sequence number which advances for each start-up and a checksum. The observation at the receiver of a gap in the series of sequence numbers in messages determined to have originated from a particular tributary modem is used to accurately compute a missed message rate for that modem.

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