Installation Guidelines, Telephones and Devices

NOTE:

Asystem display phone—either an MLS-34D, MLS-18D, or MLS-12D—is required for system programming at extension 10 and/or 11. (Make sure that the programming phone is as large as the largest phone in the system, because an MLS-12D or MLS-18D cannot program an MLS-34D. Similarly, an MLS-12D cannot program an MLS-18D.)

Installation Guidelines

Telephones and Devices

You can connect the following telephones and devices to the system:

■MLS- and MLC-Model System Phones. System phones require at least two-pair wiring and are compatible with AT&T 4-pair SYSTIMAX® wiring.

■Call Assistant Intercom Autodialers with Busy Indication (MLS-CA24). You can connect an Intercom Autodialer to the system phone at extensions 10 and 11 (maximum two per system). The Intercom Autodialer has its own power supply, which must be plugged into an AC outlet.

■Industry-Standard Devices. Industry-standard devices (including standard phones) require one-pair mounting cords; AT&T D2R mounting cords are recommended.

-Standard Phones. Connect standard touch-tone or rotary dial phones to the system for:

-Power Failure Operation. During a power failure, system phones will not work because they require power to operate. However, if you connect standard phones to extensions 10, 16, 22, and 28, users can place and answer outside calls on lines 1, 3, 5, and 7, respectively. You can connect a standard phone either alone or combined with a system phone. (If you combine a standard phone and a system phone on one extension, you may want to turn off the standard phone’s ringer during normal use.)

-Hotlines. A hotline extension should be connected to a standard phone, rather than a system telephone, but can ring any type of phone. A hotline phone can also be set up to ring the paging system, so announcements can be made over the loudspeaker. Do not connect a Hotline phone to extension 10, 16, 22, or 28, to keep them available for power failure use.

NOTE:

For message waiting capability, you must connect standard phones with message waiting lights to Release 3.1 (R3.1) 206 modules, and equip the system with an R3.1 processor module. This message waiting capability does not apply to standard phones with neon-typemessage waiting lights.

Installation Guidelines 5