My customer has 2821's and 2811's in a WAN connecting 4 offices with IPSec VPN's over internet T1 lines. They just installed a new NEC phone system that routes calls between offices across the data network. The routers have PVDM2-16 cards installed. QoS is enabled for rtp & rtcp with priority queuing. The call quality is very poor. What am I missing?
Can you post your QOS config for both ends? If your traffic is going over a secure circuit there are special issues to consider since the packets are encrypted and can't be categorized by QOS rules.