Posted 03 January 2013 - 07:10 AM
The AT&T U-verse routers are usually 2Wire RG 3800HGV-B Routers. These are Hyper-G devices, so getting 35Mbps on a 802.11g connection is possible under good conditions.
The main limiting factor (aka "overhead") in wireless is the retransmission of dropped packets. If you have a router that logs them, you can check the dropped packet count and you'll see that wireless usually has at least a 10% drop rate, and often 2 or 3 times that, depending on the level of interference. This is why 5Ghz oftens performs better (fewer devices on the band and less noise).
The main problem with 5Ghz is that it penetrates solid objects (like walls) less readily than does 2.4GHz, so the effective range will be a bit less all things being equal.
To the original poster's issue - is the DirecTV WCCK even capable of 5GHz operation? Honestly, I'd be surprised to learn that they were shipping a dual band device as early as when the WCCK came out. I use a wired CCK so I don't know for sure what the wireless model can do.
It might be more practical to move the router to a different 2.4GHz channel. Many routers come defaulted to channel 6, making the middle of the band very crowded. Moving to channel 1 or 11 can often make a big difference. If you have an Android phone or tablet there is a nifty little app call "Wi-Fi Analayzer" that will show you all the visible wireless networks, their channels and their relative strengths. It will even suggest the best channel for you to use.
Personally, we use wired connections wherever possible. We have a gigabit Ethernet backbone with an Asus RT-N66U dual band router connected to FiOS 75/35 Mbps service. We can download a 30 minute SD program from DirecTV on demand in 5 minutes and most of the time HD content comes down at about twice real time (IOW, 30 minutes for a 60 minute download).
Dish Network Customer from 1998-2001
DirecTV Customer since October, 2001
Moderator, DBSDish.com 1999-2000
Co-Founder and Administrator, DBSForums.com 2000-2006
DirecTV: HR34-700 (1TB) / HR24-100 (1TB) / HR24-500 (1TB) / H
R21-700 (320GB) / HR21-100 (1TB) / 2 H25s / C41-500 / SWiM16 / Nomad / CCK
FiOS: 2 Tivo Roamio Pros (6 TB total) / 5 Tivo Minis attached via MOCA