DSL cuts out

My daughter's school is a low budget charter school using mostly spit and bailing wire networking. Great teachers, lousy technology.

The phone line comes in and goes to a 4-way splitter. Three lines go out to telephones, each having a Line 1 and a Line 2. The fourth line goes to the DSL modem (I didn't write down the brand or model number). The ethernet output goes to a Linksys WRT54G router. The only DSL filters in the place are lying uninstalled in a shoe box labeled "Phone Stuff". The Chief Technology Officer told me, "I was told I needed them, but I didn't know what to do with them." Like I said, it's a low budget operation.

They loose their Internet connection several time a day. Unplugging the DSL modem and the router from the power and plugging them back in again usually restores it.

I tried actually taking the DSL filters out of the shoe box and using them on the phone lines. This lost Line 2 one each of the three phones. I removed the filters and put them back into the shoe box.

I'm not a hardware guy, but I'm guessing the lack of DSL filters is the first thing to address.

I'm guessing that DSL uses the same part of the phone signal that is used by the the second line of two line phone service. I'm guessing that's why the DSL filters block Line 2 on the telephones.

Question 1: Is that correct?

I'm guessing that there is no good way to put DSL one the same wire as two line phone service.

Question 2: Is that correct?

I'm guessing that this is the reason, or at least one of the more significant reasons, for their losses of connectivity. I'm further guessing that the cheapest solution is to buy a another phone line using a separate wire just for the DSL.

Question 3: Is that correct?

Thank you for you assistance.

 

Okay, I can answer my own questions. I figured out that there are single line DSL filters and dual line DSL filters. Doh. The had bought the wrong kind of filter. Well, I said I wasn't a hardware guy. :-o