Bellsouth gave me a box of filters that have two RJ-11 jacks. One for the DSL modem and one for a phone. The instructions specified that every phone be connected to a filter. The DSL modem would then be connected to the DSL jack along with one of the phones. The modem should not be connected directly to a phone line.
The point is to isolate (filter) the DSL signaling from the voice signaling as Juergen describes. However in the US the wiring is not, typically, "home-run", but daisy chained, one wall plate to the next with no place to put a whole house filter. Telcos do not like customers in the demark at the cable entrance and customers can install their own DSL equipment. I did. Bellsouth mailed the equipment to me with a CD and a set of paper instructions. It's just easier to tell the DIY'r to filter everything. Bob... On Tue, 2006-05-09 at 20:41 +0200, Juergen K. Zick wrote: > Well, > > to avoid a misunderstanding see the following drawing: > > > > /-------DSL-MODEM-----HT-----PC > H| | > +----------+ Inet-PHONE > from BellSouth (DSL over POTS) ---| SPLITTER | > +----------+ > L| > \------------------------------ > | | > answering POTS > machine > phone > > > > (maybe you have to reformat it into COURIER font) > > It's depending on the calling in your father`s flat but on the incoming > line you should have only _ONE_ device, the SPLITTER !!! > > maybe your dad can try that ... > > All DSL connections in Germany are build up like that and I have not seen > any that did _not_ work with this cabling ... > > > --Jürgen > > > > > >Juergen K. Zick wrote: > >>HI, > >>well, that was what I expected in my posting yesterday. For me, your > >>wiring looks strange. Here in Germany, we have "spiltters" connected to > >>the incoming line which have two outputs: A high pass filter output for > >>the DSL signal and a low pass output with DC pass-through for the POTS > >>signal. the DSL output is being connected to the DSL-modem and the POTS > >>output will feed your internal POTS wiring. > > > >The only jack that has both a phone and the DSL connector indeed has a > >splitter on it, provided by Bellsouth. > > > >>Therefore, there is _NO_ filter needed on each POTS outlet, because there > >>is nothing to be filtered out on your internal line anymore. > > > >You may be correct. I am definitely _not_ familiar enough with DSL. > >However, 5 years ago, I had a DSL line in my apartment, and I was > >specifically told by the installation tech that I needed a filter on _any_ > >jack that had a real phone connected to it. That may not have been > >necessary, or perhaps isn't necessary any longer, or perhaps varies by > >provider, but that's what I was told at the time, and that's what I did > >(with no problems). > > > >The filters on the phone jacks that didn't have the modem connected were > >not splitters, just single filters. > > > >>Seen from my German wiring knowlegde, your cabling is wrong and causes > >>the interruptions on the DSL service. > > > >That's definitely possible, just not my personal (single point!) experience. > > > >>Don`t you have something like a "spiltter" available ? It should be the > >>_ONLY_ filter on your incoming line and then the DSL-modem and the POTS > >>phone should be connected to it ... > > > >OK, it would be easy for him to remove the other filters temporarily and > >test again. > > > >Thanks! > > > >>--Jürgen > > > >>>Replying to my own post (and my most recent follow-up). I have now > >>>confirmed 100% that the DSL modem gets a _new_ IP address every time his > >>>"real" phone gets answered, or hung up! This (of course) disrupts the > >>>audio coming from to him, since the sending machine (Asterisk in my > >>>case), no longer has the correct IP address to send to him. > >>> > >>>I lowered his registration from the default 1 hour to 1 minute, so after > >>>we're disconnected, I can see that he's re-registering with a new IP > >>>address, each and every time :-(. > >>> > >>>I told him to call Bellsouth and ask about a Static IP address, but I > >>>don't know if they offer it, or how much they charge. > >>> > >>>While this one isn't "solved", it's at least "explained". > >>> > >>>Thanks to everyone who responded! > >_______________________________________________ > >--Bandwidth and Colocation provided by Easynews.com -- > > > >Asterisk-Users mailing list > >To UNSUBSCRIBE or update options visit: > > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ > --Bandwidth and Colocation provided by Easynews.com -- > > Asterisk-Users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ --Bandwidth and Colocation provided by Easynews.com -- Asterisk-Users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
