RFC 2880 (rfc2880) - Page 2 of 37

Internet Fax T

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 dependencies .................12
      4.1 Image coding ........................................13
        4.1.1 Bi-level coding .................................13
        4.1.2 Multi-level coding ..............................14
        4.1.3 MRC format ......................................14
      4.2 Resolution and units ................................15
      4.3 Colour capabilities .................................17
      4.4 Document size .......................................18
   5. Mapping T.30 capabilities to fax feature schema .........18
      5.1 Image coding ........................................20
        5.1.1 Bi-level coding .................................20
        5.1.2 Multi-level coding ..............................21
        5.1.3 MRC format ......................................23
      5.2 Resolution and units ................................23
      5.3 Colour capabilities .................................24
      5.4 Document size .......................................26
   6. Examples ................................................26
      6.1 Common black-and-white fax machine ..................27
        6.1.1 Corresponding Internet fax capabilities .........29
      6.2 Full-featured color fax machine .....................30
   7. Security Considerations .................................34
   8. Acknowledgements ........................................34
   9. References ..............................................34
   10. Authors' Addresses .....................................36
   Full Copyright Statement ...................................37








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