Chamberlain OTIU User Manual

1

Indoor Telephone Interface (OTIU)

Telephone Cord

Choose location near a phone jack and an electrical 
outlet. Do not place OTIU near a computer or any 
other “radio noise source”. Keep antenna clear of 
obstruction.

Plug in antenna.

Plug in the AC Adapter. The Power LED will light.

Plug the included phone cord in the LINE port and 
connect it to the phone jack in the wall.

Plug the cord from the phone in the PHONE port.

AC Adapter

Antenna

The Indoor Telephone Interface uses a 900 Mhz 
secure digital radio link that allows secure 
conversations and gate operator control.
The Telephone Interface Unit (OTIU) is compatible 
with various Liftmaster Wireless Products.