Quote
Originally posted by rglassband:
With T1 (at office) into switch out to static ip at phone and static ip at firewall (network), ping from home computer on verizon fios to phone ip address is 81ms average at 10p. Could it be different with internet traffic during work hours?

Now we are not prioritizing, but when we did try that, we used a router that gave up 100% priority to phone ip address. That made no difference.

Phone ip card is after switch that T1 goes into. Out of switch are 2 ethernet cables. One to firewall-network and one to phones. They each have their own static ip address.

What issues could I have if Diffserv is disabled?
Since you are basically going over the internet, Diffserv won't make a difference of call quality over the internet but can cause issues if it is turned on and the Cable companies are not configured to look for it. Diffserv would play a big role if you had an AVPN or MPLS network topology with multiple sites. It would give priority to the voice packets.