This one has me stumped. Let me know if you have seen this and/or have any suggestions.
MICS 8x32 plus 0x12 (fiber)- 5 phone lines and using 30 M7310 handsets.
Approx 6 handsets hear an intermittent buzz on internal (intercom) as well as outside line calls. There are 2 of these 6 extensions that have the issue much more frequent than the other 4. Several times per day.
For those 2 extensions, I have replaced the phones (now using Rel 22), changed pairs on the cable run, replaced cross connect, made sure the amphenol cables were secure to their ports, changed the power surge protector and the power outlet the phone system is connected to. After all of this, the problem is the same as before.
What's left? Thanks in advance for any help.