Ability to receive faxes changed weekend of 8/23
I have ... or *had* ... or am *supposed to have* 3 full feature lines.
all 3 lines are (were) set to hunt to each other (round-robin; 1->2->3->1). no one should ever get a busy signal unless all 3 lines are engaged.
all 3 lines are set to the caller ID of our published line (9797) so that we can call out of any line without having people call back in on our other lines. when we leave for the day, we forward only 9797 so that we have lines to call in to a back-door of our phone system. if anyone calls a line other than 9797, then they do not get forwarded as designed.
I have not had, and do not need, a dedicated fax line.
my phone system takes incoming calls and routes them to the fax machine if a fax signal is detected, regardless of the line that the call comes in on. we give a particular number, when requested, to receive faxes but it's not published as a fax number or dedicated to faxes. the reason we give a particular number is in case we have to change it.
this all worked for the last 2+ years. in addition, I was able to use my credit card terminal over the phone line.
sometime after the end of July 2014, something changed and no one can figure out (or admit) what.
we stopped receiving faxes - we don't get that many so it wasn't immediately apparent.
we stopped being able to use our credit card machine over the phone line. we had to change to IP only. (our merchant service told us that the terminals don't ordinarily work over digital lines anyway but ours did until the weekend of 8/23 - that's when we had to change to IP)
in the process of trying to "troubleshoot" the problem, some technician:
1. changed the custom caller ID information - so now people are calling in on the wrong lines when they "reply" by caller-ID
2. changed the hunt group so now only the 3rd line does not forward to the 1st.
3. told me that the only solution is to have a "dedicated" fax line which I didn't have to have until this problem, that I did not create.
since we don't have to use the credit card machine over the phone line and there are "online fax" options available, we were considering dropping the 3rd line anyway. so in the process of trying to force us into a 4th unnecessary line, comcast may have actually done themself out of the 3rd line that we don't really need anymore.