Can't Hear Caller sometimes

[Switchlady1]

Every so often we have been experiencing an issue where a caller would call someone on the CS1000 system, the caller can hear the person answer and/or talk but the person on the CS1000 cannot hear the caller. It's happened to a few users and I've experienced it once also when calling another user internally (within the CS1000). Does anyone know what could be causing this intermittent issue?

 

[bdmcdonald99]

What software are you running? What kind of phones IP, Digital or Analog? Could be a bad MGWC or not enough resources.

It's a phone system, NOT a clock!

 

[Switchlady1]

bdmcdonald99, old system..we are running on software 4.50 and using Digital sets (3902/3903/3904).

 

[KCFLHRC]

What kind of switch? Opt. 11, 61, 81,???

 

[Switchlady1]

Option 81, KCFLHRC

 

[trvlr1]

Does the problem persist when on core 0 and 1 or just one of them?