Arris TM522G

The UID-WRMTM5 FCC ID is for, presumably, the stand-alone wireless router module used in this device (T522 WRM).
 * The module is SerComm manuf'ed - "YAT00A-1.0MM" is silkscreened on its board.

The FCC docs for the module indicate the main unit is PUMA based.