AT&T SYSTEM 25 Manual page 11

System Access Buttons
Each multiline voice terminal (except those used as Switched Loop Attendant Consoles) has
System Access (SA) buttons that are used to place and receive calls. These
buttons, labeled with a PDC, give the user access to outside lines and system features. Unless
otherwise noted, System Access button(s) must be used for procedures described in this manual.
Any programmable button on a multiline set can be administered as an SA button. Only
buttons with both a red I-use LED and a green status LED should be used for the SA
function. If not, call appearance conditions cannot be easily monitored.
The System 25 R2V1 Implementation Manual and the System 25 R2V1 Administration Manual
provide additional information about button labeling and options.
L i g h t s
A steady red light identifies the line in use or the line that will be in use
when the handset is lifted.
A steady green light indicates that a line or feature is in use.
A slow flashing green light indicates an incoming call.
A fast winking green light indicates a call on hold. (A green light that winks
intermittently indicates a call held temporarily while being transferred or
conference.)
Display
A 16-character Liquid Crystal Display (LCD) unit on the Switched Loop Attendant Console,
and available on some multiline voice terminals, provides visual data about incoming and
outgoing calls. In addition, the display provides support for most other system features and
offers a number of local (built-in) functions, such as a clock and timer.
To adjust the visibility of the display under various lighting conditions, use the thumbwheel
Contrast control adjacent to the screen.
For more information about using the display, see the entries titled "Directory," "Display,"
"Inspect," and "Local Display Functions, " in the "Voice Terminal Features" section.
System 25 Voice Terminal Overview
1-7