sundance-communications.com/forum Forums General General Telephone & Systems Information Help Phone Problem

Two questions. Is the phone with the static cordless? If so have you tried a corded phone to see if it goes away? If the question is yes to both and you still have hear the data, try what Merritt said.

Yup, I would try using more than one filter on your telephone line cord. Try 2 or 3 or even four all plugged one into the other to make a mega filter.

Could be that wherever you are distance wise and wire wise from the central office causes the DSL modem to crank up it's output.

We have seen this problem when DSL is on a system line. We always recommend that it be put on something like a fax line.

-Hal

I am not familiar with a DSL splitter, as opposed to a DSL filter, but that might be a good idea. Is there a reason the DSL splitter couldn’t be installed somewhere down the line rather than at the NI?

First I would try putting multiple DSL filters in line with each other. I have seen this work. Make sure they are facing the right way because they are not bi-directional. Basically, if you have one facing the wrong way, you won’t hear anything downstream from it.

Second, I would try a different brand of DSL modem, if this is possible, because it worked for someone else. Sometimes it is better to have a solution than an explanation.

Third, I would make sure you have ADSL, not some other variety of DSL. Not all varieties of DSL are meant to share a phone line. Some need their own separate line. Make sure the kind of DSL you have is compatible with sharing a voice line, and that the DSL company knows you are sharing a voice line and has set up your DSL service appropriately for this. I mention this because you said you had the DSL service BEFORE the phone line.

The reason the noise disappears when you disconnect the DSL modem is clear enough. It is because the DSL modem stops chatting with central office. I think they call the DSL card in the central office a DSLAM or DSL access module.

Thanks everyone i am first going to go get some more fliters and try stacking them to see what affect that has on the static.
If that does not work i will probably ask for a modem replacement.

You say that the person at THE OTHER END also hears the static. That suggests that your static is IN BAND, in other words somewhere between 300 HZ and 3000 HZ, which is the frequency range used by voice in a telephone system. Although it may all sound like static, normal ADSL signals are OUT OF BAND, in other words, somewhere above 3000 HZ. You may hear this noise on your end, but there is no way signals of this frequency can be carried past your central office to THE OTHER END. The phone system is just not designed to do that. Once your phone call is converted to a digital signal at the central office, it can’t possibly carry a frequency much above 3000 HZ. That is why DSL is a local loop or ‘last mile’ technology.

You also said you had DSL before you had voice on this line. This suggests to me that you may have a flavor of DSL that is not compatible with voice and was never meant to share a line with voice. In other words, your variety of DSL may be using frequencies reserved for voice.

Make sure your DSL provider is sending you the right kind of DSL, one that is meant to share a voice line.

Still, try those other things too. Whatever works works! Good luck.

Thanks for all the useful info. Mike. I will definitely consider everything you've told me thanks for all the help!

You can get DSL without having dial tone. Happens around here all the time. Just need battery voltage and it's good to go.

I've noticed different brands of single line sets react differently to the noise, even with the same filters.

Your loop-current might be too high. See Sandman for a loop current regulator. You may be able to adjust it with resistors but that will cut your transmit and receive volume down some.
https://www.sandman.com/loopcur.html