|I'm not sure exactly what you mean by 2 line phones, I'm assuming you mean a unit that has the capability to place one line on hold while you answer another. |
There are 2 seperate numbers in the home coming into the one outside box.
One phone number (the one with the DSL service) is equiped with an older model desktop single line cradle type - while the other is a newer cradle type with multiple cordless units that can placed throughout the residence...(this one has a "phone solution advantage plan" service pack)
When the issue arises, the service center is called from a cell phone and when a service tech arrives he can find no problems in the home or at the box outside. The issue is remedied though if the service center checks the line from their end and all they say is "everything appears to be fine", which it is, until the next time it happens.
Could the cradle/cordless "phone solution advantage plan" line be calling the DSL line and doing something to it? the owner of the cradle/cordless "PSAP" number insists that it is the DSL equiped phone line that is the problem because of the fact that it receives a call that gives out a "half" ring...then everything is down, except for the internet.
I will do the check you mentioned at the NID at the next occurrance of the problem....but would really like to know if AT&T could be doing this on purpose or if the possibility of a DSL virus is feasible. I am no phone tech by a long shot, but have fooled with electronics all my life and have been in the construction industry for most of it and have made some repairs to this phone system (replacing of interior lines, wall outlets, junction boxes, etc.) and the issue was occurring prior to anything I have done to it.