hrs1@cbnewsi.att.com (herman.r.silbiger) (04/11/91)
At the March meeting of CCITT Study Group VIII, progress was made on several Group 3 fax enhancements. The Binary File Transfer protocol (BFT) is now a draft standard, and bit assignments in the DIS/DCS have been made. Further information on the use of the BFT protocol in G3 fax van be obtained from Phil Bogosian, tel +1 408 247 2195, fax: +1 415 745 7652. A complete text for Annex B to Rec. T.30, which describes the 64 Kbit/sec option to G3, which will work both in full and half duplex, was completed at the meeting, based on a US contribution and supported by the UK and several other countries. It will be discussed again in October, and the intention is to propose it for approval in March, 1992. This item is still not fully accepted by some delegations, but its value is becoming ever more evident. Some network providers are convinced that the availablity of G3-64 will provide a strong motivation for connecting to ISDN. For those seriously interested in the protocol, I will e-mail a copy (without the flow diagrams) upon request. There is still discussion on whether pel conversion should be provided when sending from a G3 terminal with currently standardized resolutions to terminals with the proposed new optional resolutions of 200x200, 300x300, and 400x400 pels/inch. A report which contained subjective tests on this type of interworking showed that subjectd did not perceive the resulting slight distortions. Finally, no progress was made at this meeting on the G3 character mode, due to an inability to agree on a character set. I still believe that agreement will be reached to also approve the character mode option in 1992. Herman Silbiger hsilbiger@attmail.com Tel: +1 908 949 3193 or +1 908 542 1916