I am having some issues with calls and am basically bald because I have pulled all my hair out trying to solve it. I have done a STFM and not found a solution.
Here is our setup.
Asterisk version 1.4.21.2
Freepbx version 2.5.2.2
Redhat CentOS 4.4 kernel 2.6.18-53.1.13.2.cc
We are using Vitelity for our numbers.
We have one number that goes into an IVR to go to a Grandstream phone.
We have two numbers that goes into a digium TDM410 with a FXS module that has a vtech wireless single line phone system attached to it.
What is happening is driving us crazy!@#!#
It seems that some numbers can call us with no problems. It seems that there are a bunch of numbers that do have issues. When the call comes in, we see it ring on the wireless cid, it rings and we answer it. There is silence. According to the people they hear either a fax signal or a busy signal.
Now here is where it gets even more annoying. This does not happen 100% of the time. Some times these numbers get through with no problems. On the failed calls we get a email from Vitelity stating “congestion” or one that says “busy”
You may need to watch your CLI while a call is coming in, or take a look at the logs during these calls and see what happened. Any chance you have a fax machine in line with your cordless phone?
The first step I would take is to remove the current phone and replace with a simple wired known to be to good handset and test from those “bunch of numbers”