Re: Generic tech question-dsl but no dial tone on one extension?
On the jack that has no dial tone did you check for dial tone with a device other than the fax? The fax might be dead and not able to receive the dial tone.
It was unclear from your description if you had tested there with a second POTS device or only tested with the fax.
Yes, to troubleshoot, I unplugged the fax AND filter (and dsl modem) and plugged an extra handset I have around for just such occasions directly into the jack. Handset got a dial tone at the NID and on the two other jacks, but not at this one.
Fax is now set up and working (with another filter) on one of the jacks with dial tone; dsl continues to work fine on the jack that gets no dial tone.
