Internet Fax T.30 Feature Mapping (RFC2880)

This document describes how to map Group 3 fax capability identification bits, described in ITU T.30 [6], into the Internet fax feature schema described in "Content feature schema for Internet fax" [4].

Network Working Group L. McIntyre Request for Comments: 2880 Xerox Corporation Category: Informational G. Klyne Content Technologies

August 2000

Internet Fax T.30 Feature Mapping

Status of this Memo

This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited.

Copyright Notice

Copyright (C) The Internet Society (2000). All Rights Reserved.

Abstract

This document describes how to map Group 3 fax capability identification bits, described in ITU T.30 [6], into the Internet fax feature schema described in "Content feature schema for Internet fax" [4].

This is a companion to the fax feature schema document [4], which itself defines a profile of the media feature registration mechanisms [1,2,3], for use in performing capability identification between extended Internet fax systems [5].

Table of Contents

1. Introduction .............................................3 1.1 Organization of this document ........................3 1.2 Terminology and document conventions .................3

1.3 Discussion of this document ..........................4 2. Combining feature tags ...................................4 2.1 Relationship to Group 3 fax ..........................5 2.2 Feature set descriptions .............................5 2.3 Examples .............................................5 2.3.1 Data resource example ............................6

2.3.2 Recipient capabilities example ...................6 3. Survey of media-related T.30 capability bits .............6 3.1 DIS/DTC bit 15 (resolution) ..........................6 3.2 DIS/DTC bit 16 (MR coding) ...........................7 3.3 DIS/DTC bits 17,18 (width) ...........................7 3.4 DIS/DTC bits 19,20 (length) ..........................7

McIntyre Klyne Informational [Page 1]

RFC 2880 Internet Fax T.30 Feature Mapping August 2000

3.5 DIS/DTC bit 31 (MMR coding) ..........................7 3.6 DIS/DTC bit 36 (JBIG multi-level coding) .............8 3.7 DIS/DTC bit 37 (plane interleave) ....................8 3.8 DIS/DTC bits 41,42,43 (resolution) ...................8 3.9 DIS/DTC bits 44,45 (preferred units) .................9 3.10 DIS/DTC bit 68 (JPEG) ...............................9 3.11 DIS/DTC bit 69 (colour) .............................9 3.12 DIS/DTC bit 71 (bits/sample) .......................10 3.13 DIS/DTC bit 73 (no subsampling) ....................10 3.14 DIS/DTC bit 74 (custom illuminant) .................10 3.15 DIS/DTC bit 75 (custom gamut) ......................10 3.16 DIS/DTC bits 76,77 (paper size) ....................11 3.17 DIS/DTC bit 78 (JBIG bi-level coding) ..............11 3.18 DIS/DTC bit 79 (JBIG stripe size) ..................11 3.19 DIS/DTC bit 92,93,94 (MRC maximum functional mode) .11 3.20 DIS/DTC bit 95 (MRC stripe size) ...................12 3.21 DIS/DTC bit 97 (resolution) ........................12

3.22 DIS/DTC bit 98 (resolution) ........................12 4. Summary of T.30 capability dependenci...