linton@engr.uky.edu (Paul Linton) (11/18/87)
Help!
I purchased a CTS 2400 baud modem and had a question about the way it
uses 2400 baud. It says in the manual that 2400 baud is only usable via
CCITT and that the receiving (answering) modem has to be using the same.
My question: What's the difference, if any between CCITT and Bell standard?
Does anyone else have this problem? Is there a way to call up a system that
doesnt use CCITT? Sorry this may be a stupid question but I can't find
the answer here.
Thanks,
Paul
PS> If you think this is stupid, Email me, but if it's a frequent question
that is being asked I guess follow-up.
--
Paul J. Linton UUCP: cbosgd!ukma!ukecc!linton or ukma!pjl
CSNET: linton@engr.uky.edu or pjl@ms.uky.edu
BITNET: cn0001pl@ukcc or pjl@UKMA or cn.paul@UKPR ron@topaz.rutgers.edu.UUCP (11/20/87)
There is no Bell Standard for dial-up modems greater than 1200 baud. There are CCITT standards for a variety of the speeds. All the popular 2400 baud modem use the CCITT standard. The CCITT standard does not work with the Bell 212 modem. Hence most of the available modems support 103 for 300 baud, 212 for 1200, and CCITT for higher speeds. -Ron
berger@clio.las.uiuc.edu (11/22/87)
There is a Bell standard for 2400 baud. The answer tone is
different than the CCITT standard, though the signalling is
the same. Some modems (like my NEC 2420/30) can handle both
options.
Mike Berger
Center for Advanced Study
University of Illinois
berger@clio.las.uiuc.edu
{ihnp4 | convex | pur-ee}!uiucuxc!clio!berger