AT&T MDC 9000 Specifications download pdf (Page 173)

Line Assignment (#301)

Description

Related Features

This System Programming procedure assigns the outside lines that are available

at an extension. The default order of line assignment to the buttons on a system

phone is from left to right, starting in the bottom left corner (see Figure 5-1 on

the next page). To put the lines in a different order, first use this procedure to

remove all assigned lines; then assign lines in the desired order.

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Number of Lines (#104) can be used only during initial system setup to

assign a subset of lines to all extensions. You can use Line Assignment to

assign additional lines to specific extensions. For example, if five lines were

assigned to all extensions using Number of Lines (#104) and there are eight

lines in the system, use Line Assignment (#301) to assign lines 6, 7, and 8 to

specific extensions.

After you finish Line Assignment, you can use Line Ringing to identify when

each outside line assigned to an extension should start ringing. If you add a

line to the system, its factory setting is Immediate Ring.

You can use Automatic Line Selection to determine the order in which the

system selects a line for an extension when the user at that extension lifts

the handset or turn on the speaker to make a call. If you add a line to the

system, it becomes the last line in the selection sequence.

Remove all outside lines from Hotline (#603) and Doorphone (#604/#605)

extensions to prevent calls from being made or received on them.

If you want to prevent a user at an extension from accessing a line, make

sure you restrict the line for that extension using Line Access Restriction

(#302) even if the line is not assigned to that extension, so it cannot be

accessed using Direct Line Pickup.

The user must have access to an outside line in order to dial numbers on the

Emergency Phone Number List (#406).

Considerations

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A line must be assigned to a button with lights. If a line is assigned to a

button without lights, you cannot access that line, nor can you program

anything else on the button.

You can assign multiple lines (up to 12) to a standard phone, but a

single-line phone can handle only one call at a time. To make a call, a user

lifts the handset and dials 9 at the intercom dial tone; the system selects the

first available line based on the Automatic Line Selection programmed for

the extension. (Alternatively, the user can use Direct Line Pickup to access

a specific line.)

Line Assignment (#301) 5-85

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AT&T MDC 9000 Specifications Page 173