T4.ASC
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TEXT
- The text approved is:
- Fascicle VII.3 - Rec. T.4
- 4.3 Extended two-dimensional coding scheme
- The basic facsimile coding scheme specified in S 2.2 of Recommendation T.6
- may be used as an option in Group 3 facsimile. This coding scheme is limited to
- the use of the Error Correction Mode specified in S 3.3.
- 4.4 Error limiting mode
- One-dimensional coding scheme with the division of scan line into parts.
- The one-dimensional coding scheme with the division of scan line into
- parts is an optional extension of the one-dimensional coding scheme specified in
- Annex B.
- 5 Modulation and demodulation
- Group 3 apparatus operating on the general switched telephone network
- shall utilize the modulation, scambler, equalization and timing signals defined
- in Recommendation V.27 ter, specifically SS 2, 3, 7, 8, 9, 11 and the Appendix.
- 5.1 The training signal to be used shall be the long training sequence with
- protection against talker echo (see Recommendation V.27 ter, S 2.5.1, Table
- 3/V.27 ter).
- 5.2 The data signalling rates to be used are 4800 bit/s and 2400 bit/s as
- defined in Recommendation V.27 ter.
- Note 1