I am struggling to improve the voice quality over a point to point link. I have 2 asterisk servers which are connected with a 256k link between office A and B. The moment when the line gets busy the voice quality gets very bad.
I enabled ip header compression on both the routers and I would like to give high priority to UDP traffic.
I used the following commands , this is on a 1701 CISCO router running ver12.1
For Header compression:
ip tcp header-compression iphc-format
ip rtp header-compression iphc-format
ip rtp compression-connections 100
I used the follolwing commands to prioritize UDP traffic;
R1(config)#priority-list 1 default low
R1(config)#priority-list 1 UDP high
The router does not seem to support this line. I would appreciate any assistance regarding the correct commands for traffic prioritization. I am not sure if this is the correct way to do this either.
Any help would be highly appreciated