How is this (SDLC?) CRC computed ?

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Article #14798

#14798

From: Herity D.
Date: Thu, 19 Nov 1992 17:46

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I'm doing an SDLC implementation in software (processing every bit) and
am stumped by the CRC calculation.
I receive a packet 03h,05h,08h,17h,31h,94h, the last two bytes of which are
the CRC. This is in MNP level 5. I've read several versions of how the
SDLC CRC is computed, but I can't reproduce it. I've tried CRC-CCITT,
CRC-16, LSB first and MSB first, initialising to 0s and 1s, but there's
something missing.

Suggestions, anyone ?

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| Dominic Herity,  dherity@.cs.tcd.ie,                      | Something clever |
| Computer Science Dept, Trinity College, Dublin 2, Ireland.| coming soon to a |
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Message-ID: <1992Nov19.174655.1416@cs.tcd.ie>

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Newsgroups: sci.electronics
Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!ieunet!tcdcs!dherity
From: dherity@cs.tcd.ie (Herity D.)
Subject: How is this (SDLC?) CRC computed ?
Message-ID: <1992Nov19.174655.1416@cs.tcd.ie>
Keywords: SDLC, CRC, MNP
Organization: Computer Science, Trinity College Dublin
Date: Thu, 19 Nov 1992 17:46:55 GMT
Lines: 15