I investigated moving it, so I took the covers off my phone jacks and poked around to see if there was a better place for the gateway in the apartment. The short answer was no. I replaced the jacks and continued cleaning.
I went to check the Internet for the best way to clean my walls. No Internet. I untaped the gateway so I could see the blinky lights. The DSL light was blinking red. That is bad. According to the AT&T tech support (not bad, btw), they can't see my modem; they are sending somebody on Tuesday.
So, LJ friends, what in my story caused my DSL connection to stop working?