phil@killer.Dallas.TX.US (Phil Meyer) (05/11/89)
We just completed a VERY difficult installation of a pair of MUXs over a leased line from Dallas to Austin, Texas. It may be relevant to anyone soon to do a similar project. The only real difficulty was that Southwestern Bell is pushing to set a new standard for the rest of the world. They now require their field service people to install eight wire (RJ48S I think - more about that later) connectors on their leased lines. They are unwavering in their desire to make life as bad as possible for us low lifes who have to deal with this stuff. The tech who installed our lines didn't even know what kind of connector it was that he was installing, but simply wrote 'eight wire' on the thing. I cussed and threatened, but he wouldn't change it. He suggested that radio shack might have an adapter, or that I should contact 'my provider'. Chew on that for a minute. Wasn't HE my provider? Anyway, I let him get away without fully understanding the true nature of my problems. I will list them for you, and the only good solution. 1. NOONE makes a RJ48S to RJ11 adapter. In fact, few people even know what that is. In fact, they aren't even sure what to call the thing. I heard 'RJ75', 'RJ45', and someone at MCI said it has to be a RJ48S if it uses 4 wires. 2. Southwestern Bell cannot help you. Their own people do not know the correct wiring for an adapter (after 10 days, I gave up). 3. Even the modem/MUX manufacturer that I dealt with was no help. They claimed that they had done this once before, and maybe sales could FED EX me a cable. (It was that 'maybe' that bothered me) Solution: Have someone run an RJ11 directly off the the connector posts. There is a set of outputs there. SWB now has a special modem on each end, and the connector post is located on the bottom. Look for the line in, there is a set of outputs right on the same set of connector posts. Forget trying to 'make' a cable.
grr@cbmvax.UUCP (George Robbins) (05/12/89)
In article <8072@killer.Dallas.TX.US> phil@killer.Dallas.TX.US (Phil Meyer) writes: > > We just completed a VERY difficult installation of a pair of MUXs over > a leased line from Dallas to Austin, Texas. > > It may be relevant to anyone soon to do a similar project. > > The only real difficulty was that Southwestern Bell is pushing to set a > new standard for the rest of the world. They now require their field > service people to install eight wire (RJ48S I think - more about that later) > connectors on their leased lines. They are unwavering in their desire to > make life as bad as possible for us low lifes who have to deal with this > stuff. Am I missing something? This has been standard in the rest of the US for quite a while, not to mention the RJ11 jack simply plugs in, and the data pair(s) happen to be on the middle 2(4) pairs... -- George Robbins - now working for, uucp: {uunet|pyramid|rutgers}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@uunet.uu.net Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)
ron@ron.rutgers.edu (Ron Natalie) (05/13/89)
If it is just a programmable data jack, why not shove the RJ-11 plug into the middle 4 pins, it will fit, and works. -Ron
howeird@hpwrce.HP.COM (Howard Stateman) (05/16/89)
> phil@killer.Dallas.TX.US (Phil Meyer) writes: >The only real difficulty was that Southwestern Bell is pushing to set a >new standard for the rest of the world. They now require their field >service people to install eight wire (RJ48S I think - more about that later) >connectors on their leased lines. They are unwavering in their desire to >make life as bad as possible for us low lifes who have to deal with this >stuff. RJ45 has >always< been the leased line standard. I've been installing MUXes since 1980, and have never seen anything else. I have installed at Pacific NW Bell, Pacific Bell and in Winnipeg, Canada (whatever telco they may have) sites. RJ45 is the 8-wire jack, as far as I can tell. It sounds like SWB has finally decided to adopt the standard. >1. NOONE makes a RJ48S to RJ11 adapter. In fact, few people even know >what that is. In fact, they aren't even sure what to call the >thing. I heard 'RJ75', 'RJ45', and someone at MCI said it has >to be a RJ48S if it uses 4 wires. No one makes one because no one needs one. Another part of the standard is that the RJ connections are wired from the center of the connector outward. That is, a 2-wire RJ connection (such as standard domestic single-line phones) uses the inside 2 wires. 4-wire connections use the inside 4 wires. And so on. Which means if your site only uses 4 of the 8 wires, it will always use the same 4 (inside) wires, and you can just plug the sucker right into the 8-wire jack. -------------------------------------------------------------------- |Howard Stateman, Hewlett-Packard Response Center, Mountain View, CA | |howeird@hpwrce.HP.COM or hplabs!hpwrce!howeird | |Disclaimer: I couldn't possibly speak for HP. I know too much. | |--------------------------------------------------------------------| |Sysop of the Anatomically Correct BBS (415) 364-3739 | --------------------------------------------------------------------
howeird@hpwrce.HP.COM (Howard Stateman) (05/16/89)
From howeird Mon May 15 10:12:10 1989 Relay-Version: version Notes 2.8.2 87/11/24; site hpwrce.HP.COM From: howeird@hpwrce.HP.COM (Howard Stateman) Date: Mon, 15 May 1989 17:12:10 GMT Date-Received: Mon, 15 May 1989 17:12:10 GMT Subject: Re: WARNING: SWB new 'standard' - RJ48S Message-ID: <7320001@hpwrce.HP.COM> Organization: Ye Olde Salt Mines Path: hpwrce!howeird Newsgroups: comp.dcom.modems Posting-Version: version Notes 2.8.2 87/11/24; site hpwrce.HP.COM References: <8072@killer.Dallas.TX.US> > phil@killer.Dallas.TX.US (Phil Meyer) writes: >The only real difficulty was that Southwestern Bell is pushing to set a >new standard for the rest of the world. They now require their field >service people to install eight wire (RJ48S I think - more about that later) >connectors on their leased lines. They are unwavering in their desire to >make life as bad as possible for us low lifes who have to deal with this >stuff. RJ45 has >always< been the leased line standard. I've been installing MUXes since 1980, and have never seen anything else. I have installed at Pacific NW Bell, Pacific Bell and in Winnipeg, Canada (whatever telco they may have) sites. RJ45 is the 8-wire jack, as far as I can tell. It sounds like SWB has finally decided to adopt the standard. >1. NOONE makes a RJ48S to RJ11 adapter. In fact, few people even know >what that is. In fact, they aren't even sure what to call the >thing. I heard 'RJ75', 'RJ45', and someone at MCI said it has >to be a RJ48S if it uses 4 wires. No one makes one because no one needs one. Another part of the standard is that the RJ connections are wired from the center of the connector outward. That is, a 2-wire RJ connection (such as standard domestic single-line phones) uses the inside 2 wires. 4-wire connections use the inside 4 wires. And so on. Which means if your site only uses 4 of the 8 wires, it will always use the same 4 (inside) wires, and you can just plug the sucker right into the 8-wire jack. -------------------------------------------------------------------- |Howard Stateman, Hewlett-Packard Response Center, Mountain View, CA | |howeird@hpwrce.HP.COM or hplabs!hpwrce!howeird | |Disclaimer: I couldn't possibly speak for HP. I know too much. | |--------------------------------------------------------------------| |Sysop of the Anatomically Correct BBS (415) 364-3739 | --------------------------------------------------------------------
kenn@Apple.COM (Kenn Walker) (05/16/89)
In article <6839@cbmvax.UUCP> grr@cbmvax.UUCP (George Robbins) writes: >In article <8072@killer.Dallas.TX.US> phil@killer.Dallas.TX.US (Phil Meyer) writes: >> We just completed a VERY difficult installation of a pair of MUXs over >> a leased line from Dallas to Austin, Texas. >> The only real difficulty was that Southwestern Bell is pushing to set a >> new standard for the rest of the world. They now require their field >> service people to install eight wire (RJ48S I think - more about that later) >> connectors on their leased lines. They are unwavering in their desire to >> make life as bad as possible for us low lifes who have to deal with this >> stuff. >Am I missing something? This has been standard in the rest of the US for >quite a while, not to mention the RJ11 jack simply plugs in, and the data >pair(s) happen to be on the middle 2(4) pairs... Actually, the RJ-48 I just had installed (they did it on their own, not by my request (the RJ-48 that is)) is wired with the transmit and receive pairs on the outside four pins. There is no way that an RJ-11 can utilize that connector. An RJ-45 (which is physically the exact same fargin' jack) is wired as a super-set of the RJ-11 and will allow you to plug in. kenn "How can my employer be responsible for what I say, when he can't understand me in the first place???" (i.e. Standard Disclaimer) Kenneth E. Walker Apple Integrated Systems, Apple Computer, Inc.
grr@cbmvax.UUCP (George Robbins) (05/19/89)
In article <30772@apple.Apple.COM> kenn@Apple.COM (Kenn Walker) writes: > In article <6839@cbmvax.UUCP> grr@cbmvax.UUCP (George Robbins) writes: > >In article <8072@killer.Dallas.TX.US> phil@killer.Dallas.TX.US (Phil Meyer) writes: > >> We just completed a VERY difficult installation of a pair of MUXs over > >> a leased line from Dallas to Austin, Texas. ... > >Am I missing something? This has been standard in the rest of the US for > >quite a while, not to mention the RJ11 jack simply plugs in, and the data > >pair(s) happen to be on the middle 2(4) pairs... > > Actually, the RJ-48 I just had installed (they did it on their own, not by > my request (the RJ-48 that is)) is wired with the transmit and receive > pairs on the outside four pins. There is no way that an RJ-11 can utilize > that connector. An RJ-45 (which is physically the exact same fargin' jack) > is wired as a super-set of the RJ-11 and will allow you to plug in. Hmmm, that puts a bit of a differnt light on it. Did you specify anything "special" like a metallic circuit, DDS, or exotic conditioning? Did you specify nothing about termination? I've found some installers that coudn't conceive doing anything except what is on their work order, others seem willing to do whatever you want. The biggest problem is usually ordering the lines in first place with the right babble and key-words... -- George Robbins - now working for, uucp: {uunet|pyramid|rutgers}!cbmvax!grr but no way officially representing arpa: cbmvax!grr@uunet.uu.net Commodore, Engineering Department fone: 215-431-9255 (only by moonlite)