🚀 go-pugleaf

In article <4efvat$ce8@clarknet.clark.net>, blckshaw@clark.net says...
>
>In article <1996Jan28.020322.1@eisner.decus.org>, bruce@eisner.decus.org 
>writes...
>>
>>In article <3109BD3F.1CA7@microplex.com>, Fred Fierling <fff@microplex.com> 
>writ
>>es:
>>> 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?
>>
>>Are you sure you are seeing v.35 (as in the way Digital Link for one does
>>it), or do you mean EIA-530 which is becoming more common but is 449 on a 
>db25
>>connector?
>
>He is probably looking at a video telecon system. Due to real estate
>restrictions many vendors of VTC bring the V.35 interface out on a
>DB-25 connector (I know of at least three who do this). Also V.35
>interface cards for PCs simply do not have room for a true V.35
>connector. All of the systems I've tested had adapter cables with
>DB-25 (or similar) on one end and V.35 connectors on the other. I
>don't recall the vendors putting any pinout diagrams in their
>manuals and I would suspect that it is everyman for himslef.

In direct response to the original question,  there are no 'standards'
for a V.35 interface pinned-out on a DB25.  It is very common on all
types of serial equipment,  but everyone seems to do it a bit differently.
Yes,  one of the reasons for using DB25s instead of Winchesters is size,
but another is cost.  Those big blocks are darned expensive.

A few points on other comments.  Many vendors do supply a conversion cable,
or make it available separately.  Unlike Bob,  virtually all of the equipment
that I have seen with V.35 via DB25 provide the pinout in an Appendix to
the manual.  In those cases where it is not in the manual,  a quick call to
the vendor will get you the info,  and push that particular vendor one step
closer to putting the info where it belongs.

dave