Summary

Recommendation ITU-T T.38 defines the procedures to be applied to allow Group 3 facsimile transmission between terminals where, in addition to the public switched telephone network (PSTN) or integrated services digital network (ISDN), a portion of the transmission path used between terminals includes an IP network, e.g., the Internet.

This revision of this Recommendation consolidates material from ITU-T T.38 (09/2010) with
ITU-T T.38 (2010) Erratum 1 (04/13), ITU-T T.38 (2010) Amd. 1 (10/2014), T.Imp38 (02/2015), and adds new material to Appendix V related to multiple ITU-T T.38 domains connected in series.