[cisco-voip] CCM 4.1(3) audio delay !!!

[Djokic Sinisa]

hi group..

 

does anybody has an idea what could be the cause of the following problem..

we have a CCM4.1(3) cluster with 2x 2851 as a h323 gateways..the phones are
7912, 7940, 7960 and 7970..

 

the problem is as follows..

 

 

when external caller makes a call to IP phone inside a CCM cluster the call
comes over PSTN and PRI..

the IP phone rings, somebody answers the phone..caller starts to talk
immedialtely..for first 2-3 seconds person on the IP phone cannot hear
anything, and after that interval everything is fine..no conversation is
lost..just for first 2-3 seconds it looks like conversation is delayed but
not lost, and afterwards everything is fine..

 

in opposite direction..

 

 

when IP phone makes a call to some external number over the PSTN and
PRI..external phone rings..somebody answers.. caller starts to talk
immedialtely.. external phone can hear a caller from IP phone side but have
lost first 2-3 seconds of conversation..afterwards everything is fine..

 

 

ther is no firewall between any of the devices, everything is clear..

 

 

any ideas?..

 

thanx..

 

 

regards..

 

Sinisa Djokic 

System Engineer
CCNP,CCDA,CQS-CWLDS,CS-CIPTDS,CS-CIPCCES Cisco Certified

 




  

MDS Informaticki inzenjering
Bul. Arsenija Carnojevica 170
11070 Novi Beograd, Serbia
Tel: +381 11 2015 200, 2015 273
Fax: +381 11 3194 954
www.mds.rs
sdjokic at mds.rs

 

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