One of our locations is configured with a PRI circuit and the employees there are reporting to me that they experience intermittent problem with static on calls coming into and going out through the PRI.
If they hang up and dial back then they will typically get a clear circuit...although sometimes it takes 2 or 3 tries before the call is static free.
Everything in our router is configured correctly as far as I can tell (an incorrect configuration would not cause static anyway right?) and the PRI circuit has been up and running clean and clear for months.
Even now calls work well most of the time and we do not experience any service outages.
A few weeks ago is when I started getting reports of the intermittent static issue.
From what I can tell some days are worse than others.
My first instinct was to contact the telco(AT&T) and ask them to check the PRI circuit...and they did some testing which resulted in the default answer that the circuit is up and running.
They are saying the problem is on our equipment.
I replaced the VWIC 2MFT T1 card in our router and I also replaced the patch cable that is jacked into it...these changes did not eliminate the static.
If I contact the telco again is there anything particular to ask them regarding a problem like this?
Can a PRI have a bad channel or does it function in an all or none manner?
Also is there any way to monitor for problem internally and possible capture the problem as it is happening?
Has anybody had experience troubleshooting a problem like this?
Thanks in advance for your help!