Path: utzoo!attcan!uunet!lll-winken!lll-lcc!ames!ll-xn!mit-eddie!bloom-beacon!csnz.UUCP!paul
From: paul@csnz.UUCP
Newsgroups: comp.dcom.telecom
Subject: Submission for comp-dcom-telecom
Message-ID: <8805152348.AA10963@dsiramd.dsir.govt.nz>
Date: 15 May 88 23:48:30 GMT
Sender: daemon@bloom-beacon.MIT.EDU
Organization: The Internet
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Approved: telecom@xx.lcs.mit.edu

Path: csnz!paul
From: paul@csnz.nz (Paul Gillingwater)
Newsgroups: comp.dcom.modems,comp.dcom.telecom,comp.std.internat,nz.general
Subject: CCITT V22bis
Summary: What does bis stand for? and CCITT vs Bell
Keywords: bis,V22,CCITT,Bell
Message-ID: <26@csnz.nz>
Date: 16 May 88 10:27:45 GMT
Reply-To: paul@csnz.UUCP (Paul Gillingwater)
Distribution: world
Organization: Computer Sciences of New Zealand, Wellington, NZ
Lines: 35

Just from idle curiosity: what does the 'bis' stand for in
CCITT V22 bis (2400 FDX)?  Can someone breifly explain to
the many comms novices who read this a bit more about CCITT
standards, and why they are not compatible with Bell standards.

In NZ the local PTT (Telecom NZ) REQUIRE any Bell/CCITT standard
modems to have their Bell modes disabled (firmware change) before
they will allow them to be connected to the network.  I understand
this is ostensibly because some of the Bell tones used are similar
to exchange control frequencies, and crosstalk could interfere
with other users of the exchange (e.g. by disconnecting them).

The implications of this are that any LEGAL modem in NZ _cannot_
dial direct to the US for data access, but must go via NZ Telecom
Pacnet gateway for protocol/standard conversion (hints of 
forestalling competitive networks?? :-), and this will only work
for datasources that are actually connected to a recognised
network with existing gateway.

Does anyone from a CCITT-using domain have experience with this?
Do we have to risk using ILLEGAL (i.e. Bell standard) modems to
get access to sources in the US?  What do PTTs in other countries
do about this?  Do they allow both standards to be used?

Can someone on the US mainland summarise briefly what commercial
networks are available with CCITT gateways accessible from NZ?
(including X25).  Also, how can I contact US bulletin boards
without a Bell standard modem?

Thanx,
-- 
Paul Gillingwater, Senior Consultant   Call my private BBS - Magic Tower,
Computer Sciences of New Zealand Ltd   NZ +64 4 753561 V21/V23 8N1 24hrs
P.O.Box 929, Wellington, NEW ZEALAND   Soon: V22/V22bis/Bell 103/Bell 212A
Vox: +64 4 846194, Fax: +64 4 843924  "Scott me up, Beamie!"-Lounge Suit Larry