System constantly losing xbox live connection

Hello, I'm at my wits end about this problem and quite upset considering I'm paying for services that I really feel I'm not getting.  Anyway, I have an older white xbox 360 with a black external wireless-n adapter to connect to the internet.  My xbox will initially connect to xbox live when it is turned on, however after a varying amount of time, somewhere between two minutes and around half an hour, it loses the connection and tells me I'm disconnected.  As soon as this happens I go to my network settings screen and test my connection, it connects without a hiccup.  Why on Earth is my xbox constantly disconnecting when it says it has a good connection?  This seems to be more prevalent with netflix, but that could be because I don't really play too many games online lately and netflix is primarily the only thing I do on xbox live.  Any help would be greatly appreciated as I've tried countless things such as port forwarding, setting my xbox to a static IP address, resetting the modem and router and even adding a second router as a connection point to see if that would help.  Below is the requested information to the best of my knowledge:

What Country/State/Province do you live in? Pennsylvania, USA
Modem brand & model number: 
**** Model # TM502G/CT
Router brand & model number: 
Linksys WRT54GS V7.2
If Wireless, are you using a white or black external adapter, or an internal (Xbox 360S) adapter?
External Black Wireless-N Adapter
Things you have tried: 
Port Forwarding, Static IP Address, resetting and replacing router
Is UPnP Enabled?
Yes
Do you have a NAT error? If so, what is your NAT?
No
Any Error Codes you encounter: 
None as of now
Who is your ISP(Internet Service Provider)? 
Comcast
After you run "Test Xbox LIVE connection" press “Y” for "More Info”. In the pop-up that appears, what are the following values, if shown? (If a value below does not appear for you, just leave it blank.)
W:
X:
Y:
Z:
ID:
L:
Q:
T:
D:
S:
C:

 

Question Info


Last updated July 4, 2018 Views 4 Applies to:

Hello,

Do you have the ability to connect your XBOX 360 via a wired Ethernet cable directly to the modem to see if this still causes you to disconnect frequently? This is to help us narrow down the cause of the problem.

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I have connected it to my modem via an ethernet cable and had success with it being connected to xbox live, however I have not operated it this way for any extended period of time to test it and see whether or not it has connection issues this way as well.

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sai, keep trying wired to see how it goes if wired is ok you've isolated the problem as being a wireless issue then which we can work on

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I attached my xbox to my router and watched about two hours of netflix this evening without as much as a hiccup, so I believe this narrows it down to a problem specifically with the wireless aspect of my connection.  Any suggestions what to play with next to try and troubleshoot this?

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