Dacom 450/500 facsimile data transcoding, November 1981
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The first part of this RFC describes in detail the Dacom 450 data compression algorithms and is an update and correction to an earlier memorandum. The second part of this RFC describes briefly the Dacom 500 data compression algorithm as used by the INTELPOST electronic-mail network under development by the US Postal Service and several foreign administrators.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.