att door phone controller 사용자 설명서

This section provides installation and operation information for

installations with a telephone system that has an available
Dedicated Trunk port.

To customize the AT&T Door Phone Controller to your specific

installation and option requirements, you must properly set the

8-position DIP switch located on the AT&T Door Phone

Do not connect to the modular jacks on the

AT&T Door Phone Controller until after the DIP switches

have been properly set.

When using the AT&T Door Phone Controller with a telephone

system which has an available dedicated trunk, set the DIP

switch as shown in Figure 4-1. Prior to setting this DIP switch,

you must know if the dedicated trunk is Loop Start or Ground

Start; this information can be obtained from your local

telephone company.

4-2   Installation - Dedicated Trunk Port