Path: utzoo!news-server.csri.toronto.edu!rutgers!att!ucbvax!UMVMA.BITNET!CHARLIE
From: CHARLIE@UMVMA.BITNET (Charlie Turner)
Newsgroups: comp.dcom.modems
Subject: FAX Modems, Group-3
Message-ID: <9103122109.AA22187@ucbvax.Berkeley.EDU>
Date: 11 Mar 91 20:31:03 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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I have a few Fax modem questions and didn't know where else to turn
since my listserv lists (bitnet listserv master list) didn't show
any fax lists.

The terms group-2, group-3, and V.29 are all, I believe, CCITT
standards.  Presumably then a group-3 fax modem sends and receives
whatever that data format is using V.29 modulation. Is this true?  Are
the scan resolutions 203x98 lines/in (or 203x196 lines/in) part of the
group-3 definition?

I have seen group-2 called "3-minute fax" and group-3 called "sub-
minute fax". Is it correct to assume from this that group-3 is
faster than group-2?

Our office stand alone fax machine has polling operation, remote
terminal IDs (RTI), polling permission numbers (PPN), and transmit
terminal IDs (TTI). Are these things part of the group-3 standard or are
they specific to a particular manufacturer's product?

The software that operates a fax modem board may send and receive
data files in some standard graphics-type format. If this is true
then what format is it?

Any comments will be appreciated. Thanks.