Hi Furry,
Sorry, late to the "Party", the E-mail message notification does not work any longer for this forum, I will check the settings in a minute.
I do have multiple Xbox's but after fighting the Xbox's WiFi issues I bit the bullet and ran a Cat-6 cable and a switch to them for my late teen early 20's kids. When they were on Wifi it was a different problem everyday. As you know I have a high power A/P also to cover my property, it is not D-Link. I found during testing that the Xbox slims REALLY like the older A/P circa 802.11G, the slim took me and my decades of technical knowledge and flushed it. My kids have gaming parties 3,4,5 Xbox's at a time on my network, the slim has never played nice with any of my 802.11N adapters(including my old DIR-825). I know Xbox slim fans are VERY protective about their machines, but the built-in wireless in them defies everything I have tried, we are not talking hours, we are talking weeks and months of trials of trying to make the slim happy. Another problem is they are deaf! Not the problem in this case but an observation. My A/P outputs 1-watt, at 35-ft the 360 slim calls this 1-bar or weak, my Android phone and a service monitor call it a great signal at 35-ft, in this case a $10K service monitor trumps a 360, sorry. At this time during testing I have tried the Slim with a DIR-827, DIR-825, Fios router w/ WiFi, no name Chinese A/P(1-watt), Linksys WAP, Netgear router. Finally the slim smoked after 18 months, he wont's sell it to me to put in my skeet launcher, I think this is his 3rd slim that has died after a year.
Go wired and save your sanity or use a older A/P for wireless with the Slim 360's. A family of 5 uses my Dir-827 DAILY, the only problem with the WiFi was the Xbox slim, out of 10 other devices in use daily.
I have since switched to the DIR-827, I loved my DIR-825 for ease of setup and getting along with other devices, the 827 has bettered the 825. I never have to think about it, it just works! I'm still using 1.02, not in a hurry to take a chance with 1.03. The nice thing about the Dir-827, the 5-GHZ covers my whole home with my laptop and a upgraded radio in my laptop(3000+ SF).
Later,
Pat