[kajufe]

Download speeds, per speedtest.net and speakeasy, are about 20mbps.

When the speed test gets to the upload part, it usually hangs or takes a long time before giving me a result of about 0.04mbps. Basically, it's so slow, it sometimes just gives up and times out.

This translates into a real shoddy internet experience because something as simple as choosing airline tickets requires your computer to "upload" your choices. And of course, if that doesn't happen within a certain amount of time... Timeout!

I have tested the connection without my Netgear FVS336G Dual WAN router in the way and it is much better so I'm certain it's the router.

When I tell the router to use WAN 2, which is where my AT&T DSL connection is on, the upload works just fine (about .4 mbps - I'm provisioned at 512kbps so it's fine).

Also, this is the case on ALL computers on the network - wired, wireless, PC, Mac, iPhone, iPad, you name it. So, it's definitely not device specific.

This is for a client I do work for all the time, expects great service, and pays me well to have it so.

Any help would be great!

[TerryNet]

It sounds like you narrowed it down to either the router and Comcast are not working well together or else a problem with one of the router's WAN ports. Can you switch which ports are connected to Comcast and AT&T to farther isolate it?