Delay on Answer no voice

[markworton]

I have experinced a number of faults with telephone calls recently.
There is often a delay at the beginning of a call before both parties can hear one another, this has so far only been noticed on internal calls, both across venues and calls within the same building.
I have also had a number of calls which cut out during the conversation. There are long pauses of Silence during which neither party can hear the other. These pauses sometimes clear after a few seconds, on other occasions I have have had to disconnect and redial in order to re-establish the call. I have mentioned this to colleagues, some of whom have experienced similar problems but admit to not having done anything about it.

Telephones are IP touch.

Software release 9.1 but was happening on v8

[mysticalself]

Can you describe the topology of the call? Are there any compressors involved in the call or a direct RTP. Run a wireshark on that phone and try to replicate the issue..

[markworton]

Seems to be happening on digital and ip phones, trying to get a bit more info on the types of phones, but if it were problem with the compressors, would it not be completely silent until one person hangs up? What we are having is problems for the first 3-4 seconds.

If I telnet to an IP phone would that give enough info or would i actually need to port mirror to wireshark to get full logs?

[markworton]

Still investigating this: so far may look like (unless its coincidence) its just happening on iptouch 4028 phones. At the moment just dumping a compvisu log to a txt file to see if it a problem with a certain compressor and asked people to call me so i can go back through the logs to find out what compresser they were using.