🚀 go-pugleaf

Fred Fierling wrote:
> 
> A lot of modern WAN equipment comes equipped with V.35 implemented
> on a DB25 connector.  Is there a standard pinout for V.35 on a
> DB25 connector, de facto or otherwise?
> 
> --
> Fred Fierling           fff@microplex.com     Tel: +1 604 444-4232
> Microplex Systems Ltd  http://microplex.com/  Tel: +1 800 665-7798
> 8525 Commerce Court                           Fax: +1 604 444-4239
> Burnaby, BC   V5A 4N3

You are absolutly correct about this. A lot of wan equipment has 
implemented v35 signalling on a db25 connector. 60% of these are still 
proprietary pinouts. The rest conform to the original EIA-530 pinout that 
specified a physical pinout but not an electrical interface. That left it 
open to be used with 232,v35, and 422. The spec has been revised recently 
to include a electrcal interface of 422. Fastcomm uses the db25 and 
provides the capability for all three of the electricals. I have seen 
this adopted by adtran (a major player in the csu arena) and also telenex 
corporation (test equipment manufacturer) I have heard of others but have 
not seen them personally. The nice thing about this is when the 
manufacturers of routers and csu's agree on the electrical and physical 
it only requires a straight thru cable to work. These items are far 
easier to get when you are in the middle on an install and a cable is 
missing. But to be on the safe side if a manufacturer implements a v35 on 
a db25 they are almost honor bound to provide a cable to get to the 
standard winchester plug connector that is common in v35 so get the cable 
from the manufacturers of both pieces of equipment and then the only 
thing you need to worry about is whether the winchester plugs are male or 
female.
-- 
Jim Reilly
FastComm Communications
1-703-318-4385 9-6 EST
jreilly@fastcomm.com