ARRIS TG1672G-NA Web GUI User Guide - Manual (Page 59)

Section 2: Web GUI Screens and Configuration Parameter Reference
November 2013 Page 59 of 96
characters (such as $, !, ?, &, #, @, and others). A hexadecimal key must be 64 characters long.
Valid characters are numbers “0” through “9” and letters “a” through “f”.