VOIP Question

[annacat]

Hi,
We are implementing VOIP (G711 or G729)between two sites that have 1720 routers connected via a point to point T-1. Without any QOS presently configured calls sound decent. When traffic increases (about 20 users at remote site are running terminal server) voice quality degrades when calling between sites. My question is what would be the best route/recommendation to ensure that voice calls are always given priority. (QOS,TOS,DIFFSERV,PVC,???)
Thanks

 

[BuckWeet]

diffserv is the norm

what is doing the VoIP? what PBX, you need to see if they are marking the packets, if not you need to have the router classify what needs precedence or not..


BuckWeet

 

[annacat]

The PBX has an ethernet connection and is converting to IP and sending via SIP, it send a TOS number and can perform various jitter parameters

 

[BuckWeet]

Okay, then if they're marking it with TOS, you can just look for that classification in your router via class-maps, then use policy-maps to define what youw ant the traffic to do..


BuckWeet

 

[computerhighguy]

This is simple. Weighted fair-queueing. It is what the TAC usually says. If you are only using Terminal Services and VoIP, then fair queueing is enough. I find it hard to believe that 20 TS users could use that much bandwidth, especially on a private T-1. Why don't you post your config minus the passwords.