AT&T 518-455-317 manual Telephones System Telephones, System Phones

Telephones

System Telephones

This guide refers to AT&T telephones specifically designed to work with the system as system phones. These include the MLS-34D, MLS-18D, MLS-12D, MLS-12, MLS-6, and MLC-6 telephones.

System phones have several buttons in common: volume control buttons, and the [ Feature ], [ Conf ], [ Transfer ], and [ Hold ] buttons. In addition, each phone has programmable buttons that can be used for outside lines, extension numbers, outside phone numbers, or system features. Outside lines, as well as some system features, require buttons with status lights. Programmable buttons without lines assigned to them can be programmed with numbers or features, so you can use the feature or dial the number with one touch. The number in each model name indicates the number of programmable buttons with status lights plus two [ Intercom ] buttons.

If the system phone has a display, indicated by a “D” in the model name, users receive messages and prompts when making calls and programming. (More information about the display is provided in Chapter 5.) A system display phone is required for system programming. It must be as large as the largest phone in the system, since an MLS-12D or MLS-18D cannot program an MLS-34D. Similarly, an MLS-12D cannot program an MLS-18D.

Table 1-1 summarizes system phone features.

Table 1-1. System Phones

	MLS-34D	MLS-18D	MLS-12D	MLS-12	MLS-6	MLC-6
Total Number of	32	16	16	16	4	4
Programmable Buttons
Line Capacity (Number of		16	10	10	4	4
Programmable Buttons with	24*
Status Lights)
Intercom Buttons	2	2	2	2	2	2
Display	✔	✔	✔	—	—	—
Speaker	✔	✔	✔	✔	✔	—
Microphone	✔	✔	✔	✔	—	—

✶The MLS-34D has 32 programmable buttons with status lights. Since the system supports a maximum of 24 lines, up to 24 buttons on the MLS-34D can be used for outside lines.

Overview 1-5