i have a CCM with cisco phones registered to it and call established and voice is very clear, also i have another central "Nortel" with nortel phones registered and everything is ok.
i have configured SIP trunk bet the call manager and the nortel central.
when i call from cisco to nortel or vise versa:
1-call established easily.
2-two way voice reachable "both ends can hear each other" BUT WITH VERY BAD Quality.
hints: a-call statics: jitter 700-900 "too high", packet dropped
b-both phones exist in the same vlan "in the same switch",,belive me no QOS or routing or rate limit issues, i tested it deeply.
when we checked the logs at nortel central we found; the RTP traffic end point is "Cisco Call Manger IP"???? not the other phone ip!!!
but i can't find anything strange in the Call manager configuration it is a systimatic and i don't use any special services, just intiate the call.
please help in resolving this issue as the VOIP connection between these 2 networks are needed urgently.
thanks colleagues for your help and your time.