atcomsystems.ca/forum Forums TDM Business Telephone Systems Comdial Telephones & Systems Faxing Silencing Phone Calls

Go into Hyperterminal and look at the status logs. Had a site doing similar issues and it turned out to be a completely skinned 4 pair with all pairs shorted on a digital set run. Thanks Sparkie for the excellent cable run.


I would also have tech support turn on Blackbox. When the issue is recreated they should be able to diagnose it.


BTW see if you have a SRV2-II in stock. Still leaning towards a SRV3-II issue.

I think our tech is onsite again today - should be running a new cable as well. I'll let you know how that works out.

I'm going to check hyperteminal logs towards the end of the day when I get some time away from these remote jobs.

I'll run that SRV2-II board idea by my boss, we've just started using those SRV3-II boards in the last few months.

Found out what it is!

We took the fax machine completely off the system, connected it to a copper line and sent a bunch of test faxes - it was still silencing the calls, but not as frequently (one in every 15 or so).

Turns out that the vendors lines are bleeding / back-feeding through each other.

We disconnected all the copper lines from the system, sent faxes through the one copper line and bingo! No problem. Reconnected the lines and it happens again.

We've got the vendor coming out tomorrow to start checking their wiring.

Thanks for letting us know the final outcome! I'm sure all who responded made the presumption that CO was checked first and thus eliminated. I guess the KISS principle still applies.

Haha yeah it does, we did move the fax machine to a copper line as one of the first tests but didn't disconnect all the lines from the co board. The problem screamed Services board at first.

The clients old system had copper lines to all the analog devices, cc machines, faxes etc - when we installed the new one we cut back the number of copper lines and fed the analog devices off the ist board.

Add one to my list of strange problems.