AT&T Door Phone Controller operation manual Overview

Complete information about the DIP switch settings can be found in Appendix A.

Use the Flow Chart in Figure 4-1to properly set the DIP switch.

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 Controller front Panel (see Figure 4-1).

CAUTION: 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.