Jürgen, The TAE jack sounds like a great idea. In my house all of the phone and data cabling is home-run to a punch-down block in a "Comm closet". The single DSL/POTS filter is located there along with the modem router and a SPA-3000. Other than a nearby lightning strike destroying my filter, router and one NIC, it works pretty well. It's very similar to your diagram.
Bob... On Wed, 2006-05-10 at 10:44 +0200, Juergen K. Zick wrote: > Well, > > > >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. > > Yes, I was aware of that "daisy chain" problem. Nowadays, the same problems > are appearing in German flats as well, as many outlets / jacks are mounted > to the same line. And I agree that the TELCO advice for filtering > everything is much simplier for the DIY people, _BUT_ it can lead to a > mismatch of your phone line and additional reflections especially in the RF > band where the DSL signals are being located. > German phone jacks (TAE jacks) are different from RJ jacks and include > switches. That mean that you can install the splitter into the _FIRST_ TAE > jack connect your DSL modem to the splitter and the filtered POTS output > is automatically being sent into the the rest of the daisy chain ... > The proposed filtering works _ONLY_ when your line to the DSLAM is quite > short and you have not a high attenuation on it. > > --Jürgen > > > > > But slowly, we are getting completely off-topic on this list. I doubt that > changing to static IP will solve to decribed problem, because it is a line > mismatch problem on the physical layer of the connection. And these will > not go away unless you change the wiring ! > > Hadar, I would suggest to try my wiring first before you take other action > to buy something. Also, while testing the line with BellSouth, I would ask > for BERT-tests in the ATM-layer loop of your DSL.connection while your > father has no phone talk on the POTS side and then with a running phone > talk on on his phone. > > > > > >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
