SIP play-out delay

[Ibrahim Ramku]

Dear all,

I am having a problem with RTP packets. I have deployed cucm 8.6, and for some reson its response time is very variable even whe I ping

the server from inside the vlan. ( there is almost 20% packet loss ).

Reply from 192.168.223.100: bytes=32 time=9ms TTL=63

Reply from 192.168.223.100: bytes=32 time=20ms TTL=63

Reply from 192.168.223.100: bytes=32 time=203ms TTL=63

Reply from 192.168.223.100: bytes=32 time=7ms TTL=63

Reply from 192.168.223.100: bytes=32 time=80ms TTL=63

Reply from 192.168.223.100: bytes=32 time=15ms TTL=63

Reply from 192.168.223.100: bytes=32 time=15ms TTL=63

Reply from 192.168.223.100: bytes=32 time=7ms TTL=63

Reply from 192.168.223.100: bytes=32 time=283ms TTL=63

Reply from 192.168.223.100: bytes=32 time=20ms TTL=63

Reply from 192.168.223.100: bytes=32 time=10ms TTL=63

Reply from 192.168.223.100: bytes=32 time=28ms TTL=63

Reply from 192.168.223.100: bytes=32 time=7ms TTL=63

This causes voice disruption. I have not found any problem with processor, memory ect. There is no alert related to this issue.

Is there any way to configure a buffer for rtp packets, so that they are delayed before being sent. I have activated the MTP but it does only

transcoding.

Thanks in advance,

Ibra

[paolo bevilacqua]

Check (or have checked by an expert) your network, expecially WAN if there is one.

[Ibrahim Ramku]

Thanks for the reply,

By checking the logs I found this issue:

Excessive mixer calls, which is related to this bug:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCte19629

However it is not clear how to fix it.

Regards,

Ibra

[paolo bevilacqua]

That bug does not seem to apply to your problem.

[Ibrahim Ramku]

It was in fact related to this bug. The server where I installed the product was IBM and needed driver upgrade. However I installed CME with the same configuration. Problem solved.