ZyXEL Communications COMET 336 User Manual page 19

6. Type AT and press the Enter key. You should see the AT characters you typed,
followed by an OK result code. If you do not see an OK result code, turn the
modem off and on, then repeat this step.
7. Type ATDT number and press Enter, where number is your modem's telephone
number. You should see a BUSY result code. If you do not see a BUSY result code
contact ZyXEL technical support.
12 Installation