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Byte Synchronism Adjustment For Two SDLC Frames

IP.com Disclosure Number: IPCOM000048838D
Original Publication Date: 1982-Mar-01
Included in the Prior Art Database: 2005-Feb-09

Publishing Venue

IBM

Related People

Authors:
Nelson, PE Norris, RW [+details]

Abstract

There are times when it is necessary to synchronize Synchronous Data Link Control (SDLC) frames from two different sources, i.e., two SDLC frames where byte synchronism at the message level does not exist. For example, data synchronism on the loop systems must exist as data is propagated around the loop and each successive secondary station places its transmit data on the loop. If any data from a station is not in byte synchronism with data already on the loop, a second station downline from the one transmitting may start a transmission if seven one bits occur, thus blocking data from the upstream station not in byte synchronism.