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- Path: mongol.sasknet.sk.ca!news@mongol.sasknet.sk.ca
- From: Dave.Keith@Develcon.Com (Dave Keith)
- Newsgroups: comp.dcom.cabling,comp.dcom.frame-relay,comp.dcom.modems
- Subject: Re: Standard pinout for V.35 in DB25 connector?
- Date: 29 Jan 1996 14:23:35 GMT
- Organization: Develcon Electronics Ltd.
- Message-ID: <4eil97$f2l@mongol.sasknet.sk.ca>
- References: <3109BD3F.1CA7@microplex.com> <1996Jan28.020322.1@eisner.decus.org> <4efvat$ce8@clarknet.clark.net>
- NNTP-Posting-Host: davek.develcon.com
- Mime-Version: 1.0
- X-Newsreader: WinVN 0.99.2
-
- 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
-
-