DSL Actiontec Firmware Update
Actiontec routers come in three current varieties: the GT701-wg, the 1524 and the 1520. The GT70-wg is the most recent modem that CenturyLink has deployed, and is a dark gray with a single antenna. The 1524 and 1520 are both off-white with a gray accent on top; the 1524 features two phone jacks - one labled "Line" in green, while the older 1520 features only one phone jack.
Updates can be found on the following pages on CenturyLink's site:
GT701-wg update page (currently at version QW04-22.214.171.124.6.3)