AT&T 1987 AT&T Telephone User Manual


 
LINE SELECTION
Description
Multiline voice terminals may have many line (facility) appearances. There are three
methods by which a user may select a desired line:
(1) Prime Line Preference, (2) Ringing
Line Preference, and (3) Preelection.
Prime Line Preference:
Automatically connects a multiline voice terminal to a specified line or facility designated as
preferred when the terminal goes off-hook. This feature may be assigned to System Access,
Loop, Automatic Intercom, DSS, Personal Line, and Direct Facility Access buttons.
On the Switched Loop Attendant Console (V2), the topmost Loop button has Prime Line
Preference by default. However, the feature can be assigned to any of the five Loop buttons.
The user may override this feature by preselecting another button (see below).
If Prime Line Preference is assigned to an Automatic Intercom (AUTO ICOM) or DSS
button, the called voice terminal will ring as soon as the terminal goes off hook.
When the Prime Line Preference feature is assigned to an AUTO ICOM, DSS, or Direct
Facility Access (FACILITY) button, the button must be pressed to activate the busy-to-idle
reminder even though the button’s I-Use LED is lighted steadily.
If Prime Line Preference is assigned to a Personal Line button, the user is connected to the
button upon going off-hook, even if the line is busy. For V1 systems only: if Prime Line
Preference is assigned to a button that has a call on hold, no connection will be made; to get
a line for placing a call, the user must press another button. In V2 systems, the user is
always connected to the button where Prime Line Preference is assigned, even if the line has
a call on hold; if the user wishes to use a different line, the line may be preselected before
going off-hook.
Ringing Line Preference:
Automatically connects a multiline voice terminal to an incoming call ringing at the
terminal.
Line access buttons that can be selected by Ringing Line Preference include System Access,
Automatic Intercom, Coverage, and Personal Lines.
If two or more lines on a multiline terminal or a Direct Trunk Attendant Console are
ringing simultaneously, the user is connected to the first line to start ringing. If the user
wishes to use a different line, the line
must be preselected prior to going off-hook. If ringing
ceases while the user is on-hook, line preference reverts to whichever option is applicable
(Prime Line Preference or no preference).
If a line rings at a multiline terminal when the terminal is busy on another call, Ringing
Line Preference will not activate, even if the user goes on-hook during the ringing cycle.
However, Ringing Line Preference is not canceled at the Attendant Console while the
attendant is off-hook. If a line is ringing while the attendant is off-hook, the ringing line
will be selected as soon as the attendant goes on-hook.
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