 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
| HomeDiscussion GroupsPC HardwareCPUMotherboardsVideo CardsStorageNetworkingPeripheralsBrand Name Systems Related Topics Video GamesWindowsMS Server ProductsMS OfficeMore Topics ... |
Hardware Forum / PC Hardware / General Topics 1 / April 2008ADSL doesn't work with phone plugged into second socket
Hi all, I've had my telecom company out 3 times to fix this problem. First it seems there was a connection problem at socket in the wall. Having fixed that another problem remains. I have two sockets, if I plug in the ADSL modem it works fine, however, if I then plug in the telephone the ADSL drops off but the phone still works. Anyone have any idea what the problem might be? Could it be a dodgy line filter? Thanks Lionel. > Hi all, > [quoted text clipped - 10 lines] > > Lionel. The "kit" from my ISP, included an ADSL modem and four filters. You use the filter, one per telephone. This is the filter they provided in the kit. You plug the filter into the wall, then the phone goes into the filter. The filter removes the high frequency content, before it gets to the phone. http://www.dsldepot.com/ais/item_images/z200sm.JPG The wiring would typically look like this. Notice that the ADSL doesn't get a filter, but the phones do. An alternate technique, is to use a splitter at the demarc. But that requires a technician to come to your house. That is why the phone company sends out these kits, for a "splitterless" install using filters. ADSL---Router---Computers | | C.O. ------- Demarc ---------X------X------X---X--X (jacks) | | | | Filter Filter Filter Filter | | | | Phone Phone Phone Phone One issue I had, was the quality of the phone wiring and jacks in the house. I determined that my jacks had some surface corrosion (they didn't even work well with a dial-up modem, so I had some advanced warning they were bad), and that led to variable ADSL performance. Once I disconnected all the phone wiring, and ran new wire to the computer room, no more problems. Mine looks like this. ADSL---Router---Computers | | C.O. ------- Demarc ---------X---X | Filter | Phone See "Installation issues" here. I corrected my problem, without reading this. I've had ADSL for several years now. I would have done more wiring, but I'm just too lazy :-) http://en.wikipedia.org/wiki/Asymmetric_Digital_Subscriber_Line Paul Sorry for not including more information. I know where the line filter belongs, it has been working flawlessly for over a year until the recent problems. My wiring looks more like the following: ADSL---Router---Computers | | C.O. ------- Demarc ---------X------X | Filter | Phone > One issue I had, was the quality of the phone wiring and jacks in the > house. I determined that my jacks had some surface corrosion (they > didn't even work well with a dial-up modem, so I had some advanced > warning they were bad), and that led to variable ADSL performance. Once > I disconnected all the phone wiring, and ran new wire to the computer > room, no more problems. I looked at the jack immediately before the ADSL router. I could not see any problems and the technician also checked this and found a small wiring problem, I wasn't around so could see what it was. I might have to take a look at the second jack as that is the one I've been using the phone in to test. Thanks for the info. Lionel. > Sorry for not including more information. I know where the line filter > belongs, it has been working flawlessly for over a year until the recent [quoted text clipped - 10 lines] > | > Phone You need a microfilter on every phone socket being used. You don't seem to have a filter on the ADSL modem! >> Sorry for not including more information. I know where the line filter >> belongs, it has been working flawlessly for over a year until the [quoted text clipped - 13 lines] > You need a microfilter on every phone socket being used. You don't seem > to have a filter on the ADSL modem! The modem has one built in. Even so, it was working for a year with no problems. Cheers Lionel. >>> Sorry for not including more information. I know where the line filter >>> belongs, it has been working flawlessly for over a year until the [quoted text clipped - 17 lines] > > Even so, it was working for a year with no problems. Until you plugged a phone into the other socket?! The ADSL modem will work without a filter, until you plug a phone into the line. > Until you plugged a phone into the other socket?! The ADSL modem will > work without a filter, until you plug a phone into the line. Well how would it work for a year then suddenly have this problem? The modem has a built in filter. It may be coincidental also, as tonight both are working together though not reliably, there has still be some drop offs. I probably need to buy a second filter to make sure the first didn't go dodgy anyway, so I can try 2 at that time. Your logic still doesn't make sense to me but I'm not a telcoms engineer so I will try some tests to prove it wrong and hopefully someone can provide a strong argument as to why it is right. Thanks Lionel. >> Until you plugged a phone into the other socket?! The ADSL modem will >> work without a filter, until you plug a phone into the line. > > Well how would it work for a year then suddenly have this problem? Because you only just plugged the phone in to cause the problem! I quote, "if I then plug in the telephone the ADSL drops off but the phone still works" - this is entirely indicative of a missing filter on the ADSL modem. Your diagram shows no filter on the ADSL modem. > The modem has a built in filter. Are you sure - they don't normally? What model is that? > >> Until you plugged a phone into the other socket?! The ADSL modem will > >> work without a filter, until you plug a phone into the line. [quoted text clipped - 5 lines] > works" - this is entirely indicative of a missing filter on the ADSL modem. > Your diagram shows no filter on the ADSL modem. He is obviously saying he had the phone in there for a year with the ADSL modem, and no problem. I cannot remember technicalities of if you have 2 phone sockets.. you can actually test if an ADSL filter is being used, and thus if it is working.. I remember once using broadband and the phone, with no filter, and it worked fine. But when the phone was off the hook, my sensitive ears picked up a strange noise, which I narrowed down to coming through the phone, and which went when I used a an adsl filter (instead of a Y splitter). I remember meddling around even seeing what happened if I put the phone in the adsl section and vice versa , just cannot remember the results! I have heard of phones not working when you have ADSL.. If the filter isn't be used right - so if it is not being used at all. So may in the past, you had no ADSL filter, (or you had one, but were not plugging your ADSL modem in it), and it just caused noise on the telephone line, noise so quiet you didn't hear it. But now, due to some electronic adjustment of some sort. Without a filter you get nothing. I have a bag of filters anyway.. Just having one or two are important for troubleshooting.. Like any computer component. > He is obviously saying he had the phone in there for a year with the > ADSL modem, and no problem. Thank you, I thought it was fairly obvious. I went back to the manual that came with the ADSL modem and although I couldn't find where it said that a filter was built in, the directions stated to plug the modem directly into the phone port. Regardless of all that, the problem is certainly in the line. When I listen to the phone (which always has the filter on it) there is a massive amount of static. How noisy it is varies, but it looks like I'm back to having to work a time in with my telecom provider to fix it (again). Thanks for the help. Lionel. >> He is obviously saying he had the phone in there for a year with the >> ADSL modem, and no problem. [quoted text clipped - 4 lines] > couldn't find where it said that a filter was built in, the directions > stated to plug the modem directly into the phone port. Probably because it doesn't have one - hence the problems!! > Regardless of all that, the problem is certainly in the line. When I > listen to the phone (which always has the filter on it) there is a > massive amount of static. How noisy it is varies, but it looks like I'm > back to having to work a time in with my telecom provider to fix it > (again). You are 'hearing' your unfiltered ADSL modem! Plug the modem into an ADSL modem filter. Have you tried plugging the modem into a filter and a single phone into the other connector on the filter? >> Regardless of all that, the problem is certainly in the line. When I >> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 5 lines] >modem filter. Have you tried plugging the modem into a filter and a single >phone into the other connector on the filter? No, the modem doesn't get plugged into a filter, the filter is to prevent the *noise* the modem uses from getting to the phones. Plug each phone into the filters. >>> Regardless of all that, the problem is certainly in the line. When I >>> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 9 lines] > is to prevent the *noise* the modem uses from getting to > the phones. Plug each phone into the filters. No the modem does plug into the filter - a microfilter has 2 ports on the user side - ADSL and phone. >>>> Regardless of all that, the problem is certainly in the line. When I >>>> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 13 lines] > No the modem does plug into the filter - a microfilter has 2 ports on the > user side - ADSL and phone. Not on any DSL around here... Filter only has one female RJ11 port on it. >>>>> Regardless of all that, the problem is certainly in the line. When I >>>>> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 15 lines] > >Not on any DSL around here... Filter only has one female RJ11 port on it. That's the kind I was thinking of. >>>>>> Regardless of all that, the problem is certainly in the line. When I >>>>>> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 20 lines] >> > That's the kind I was thinking of. eBay item 120236053350 (http://tinyurl.com/yseqqw) . That is the only kind of filter I have encountered. Its a BT MF50 microfilter. I have never seen one that only provides a phone connection and I am not aware of any DSL modems with built-in microfilters. This is of course now a tangent to the original thread as the OP has clarified that he hears 'noise' on the line with the phone connected and the modem disconnected, so this is not a filter issue. >>>Not on any DSL around here... Filter only has one female RJ11 port on it. >>> [quoted text clipped - 8 lines] >clarified that he hears 'noise' on the line with the phone connected and the >modem disconnected, so this is not a filter issue. If it were built into the modem, it'd just be called a phone jack because the modem doesn't need the filter, the phone does. The above linked device just includes a filter on one port of the splitter and a direct-through on the modem port. AFAIK, all the DSL ISPs around here just use the single jack phone filters, probably because they're cheaper. >>>>> Regardless of all that, the problem is certainly in the line. When I >>>>> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 17 lines] > > Not on any DSL around here... Filter only has one female RJ11 port on it. I just realised RJ11 is the *modem* connector!! The filter should also have a phone connector (for the phone). > >>>>> Regardless of all that, the problem is certainly in the line. When I > >>>>> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 20 lines] > I just realised RJ11 is the *modem* connector!! The filter should also have > a phone connector (for the phone).- Do you in the US have the same connector for telephone and modem? RJ11. The only filters I have ever used have 2 sockets. Checking google images, most seem to have 2. But I see one with one. "1-Line Inline DSL Filter" It says you use it for the analog/telephone device. Not the DSL modem. i.e. you plug the telephone (or dialup modem!) in there. But the DSL modem plugs without it. So maybe you get static normally (if you are registered with DSL!) And as Kony suggested, the dsl modem wants it, uses it. And the filter is for the telephone.. So a telephone could technically be plugged into the DSL side, and it would be the same as plugging it into a plain socket.. It should get static if you do that though. .. I did test these things once.. I did have a telephone plugged in without a filter once, and I recall hearing some static.. I don't think it messed up the DSL line though.. I am not sure. I guess if you plugged the DSL modem into the telephone side, then it really wouldn't work 'cos it won't have the noise it needs! On Wed, 26 Mar 2008 14:33:25 -0700 (PDT), "jameshanley39@yahoo.co.uk" <jameshanley39@yahoo.co.uk> wrote: >Do you in the US have the same connector for telephone and modem? >RJ11. Yes >The only filters I have ever used have 2 sockets. > [quoted text clipped - 7 lines] >as Kony suggested, the dsl modem wants it, uses it. And the filter is >for the telephone.. Yes the filter is for the phone, when a filter has two ports, one for phone and one for modem it ought to more technically correctly be called a filter & splitter. I would've thought any competently designed modem has an inbuilt bandpass filter already, but I haven't taken any apart and reverse engineered them to see. >So a telephone could technically be plugged into the DSL side, and it >would be the same as plugging it into a plain socket.. It should get [quoted text clipped - 5 lines] >telephone side, then it really wouldn't work 'cos it won't have the >noise it needs! >>>> Regardless of all that, the problem is certainly in the line. When I >>>> listen to the phone (which always has the filter on it) there is a [quoted text clipped - 12 lines] >No the modem does plug into the filter - a microfilter has 2 ports on the >user side - ADSL and phone. Ah, sorry about the confusion I didn't realize it had a splitter built in. >> He is obviously saying he had the phone in there for a year with the >> ADSL modem, and no problem. [quoted text clipped - 4 lines] >couldn't find where it said that a filter was built in, the directions >stated to plug the modem directly into the phone port. Any filter the modem may need is always built in. The filters supplied for phones are not to be used on the connection to the modem. >Regardless of all that, the problem is certainly in the line. When I >listen to the phone (which always has the filter on it) there is a >massive amount of static. How noisy it is varies, but it looks like I'm >back to having to work a time in with my telecom provider to fix it >(again). So you are using a filter on the phone when you hear this static? Leave the modem plugged in, try the phone at another outlet if you have one (somewhere else on the premises). If you have other phones plugged in too, unplug those for the test. >>> He is obviously saying he had the phone in there for a year with the >>> ADSL modem, and no problem. [quoted text clipped - 7 lines] > Any filter the modem may need is always built in. The filters supplied > for phones are not to be used on the connection to the modem. Finally there are some supporters. And the users manual already said not to use the filter on the modem!. > So you are using a filter on the phone when you hear this static? Leave > the modem plugged in, try the phone at another outlet if you have one > (somewhere else on the premises). If you have other phones plugged in > too, unplug those for the test. There is two outlets on the premises. I hear the noise with all of the following combinations: Modem not plugged in, phone with filter on second outlet. Modem not plugged in, phone withOUT filter on second outlet. Modem plugged in, phone with filter on second outlet. Modem plugged in, phone withOUT filter on second outlet. Modem not plugged in, phone with filter on first outlet. Modem not plugged in, phone withOUT filter on first outlet. I'm positive the problem is in the line, I just need to make the time to get my telecoms company out, but I thank you for the help. Lionel. > Hi all, > [quoted text clipped - 10 lines] > > Lionel. What type of "Connection" problems did you have? Maybe they did some wiring changes that are affecting your situation. Maybe the entire signal is dropping off enough to loose the DSL signal strength. Have the telcom check the modem in the strange situation, maybe they can tell where the problem is. Have you tried reversing the plugs? Put the modem on the other outlet. Have you installed any alarm systems lately? You only have two phone outlets on the entire property? Clark > Hi all, > [quoted text clipped - 6 lines] > Anyone have any idea what the problem might be? Could it be a dodgy line > filter? As a follow up. Once I finally got my Telecom provider to fix the static in the phone line the problem was solved. Lionel. >> Hi all, >> [quoted text clipped - 11 lines] > >Lionel. What did they do to fix the static in the phone line? |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2010 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.