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From: tnixon@hsfmsh.UUCP (Toby Nixon)
Newsgroups: comp.dcom.modems
Subject: Re: Looking for on-line V.35 specs ?
Message-ID: <3842@hsfmsh.UUCP>
Date: 17 Aug 90 22:10:18 GMT
Sender: daemon@hsfmsh.UUCP
Organization: Hayes Microcomputer Products, Inc.  Norcross, Georgia
Lines: 42

In article <143@nic.cerf.net>, pushp@nic.cerf.net (Pushpendra Mohta) 
asks:

- I wonder if some one has an on-line copy of V.35 specs.

I don't, but I want to point out something.  V.35 is a standard for 
a 48,000bps group-band modem.  It is not, and never has been, and 
"interface standard", which is what most people mean when they talk 
about "V.35".  An appendix to V.35 described electrical 
characteristics for a serial interface, but didn't even mention a 
connector (and most people are referring to a connector when they 
refer to V.35).

CCITT Study Group XVII has discontinued support for and publication 
of V.35, because it is obsolete.  V.10 and V.11 describe the 
electrical characteristics one should use.  There is still no 
standard defined for the connector, although ISO/IEC JTC 1/SC 6/WG 3 
is working on such a standard.  V.36 and V.37 describe more modern 
group-band modems, if that's really what one is looking for.

If one is looking for a modern interface standard for high-speed 
devices, ANSI/EIA-530 is ideal.  It uses the traditional 25-pin 
D-shell connector, but the V.10/V.11 (EIA-422/423) electrical 
characteristics, and can handle up to 2 megabit data rates at 1,000 
feet.

If you REALLY NEED V.35, you'll have to find specs from one of the 
companies that makes "V.35" devices, such as IBM.  There is nothing 
in the national or international standards that describes the "total 
package" of electrical characteristics, pin assignments, and connector 
physical characteristics.

	-- Toby

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