re: Comcast business internet - VoIP QoS?

We just did this for a client on Uverse. They have a third party, cloud based VoIP phone system that was having really bad call quality issues. Their vendor recommended changing out the Cisco RVS4000 with a Sonicwall and they provisioned the QoS. Big difference.

You would think it would work if you bring in the public IP from the modem to the router with QoS. You're bringing in the same bandwidth but then determining how it's used once it hits the internal network. I haven't messed with Comcast much though. We have Cox here and their VoIP offering is pretty solid. They segregate the data and voice channels when they set it up so there's no interference from each other. I've been recommending that to a lot of our clients, not to mention we get paid pretty nice referral fees.