AT&T SYSTEM 25 User Manual page 12

Support Information (Contd)
Lights
A red l-use light and a green status light adjacent to each
<LOOP> button provide information about the loop
terminated on that button.
A steady red light identifies the line you are using or will be
using when you lift the handset. Only one red loop light is
ever lighted on the console. A steady green light indicates
that a loop or feature is in use. A flashing green light at a
<LOOP> button indicates an incoming call. When the
incoming call is answered, the flashing green light changes
to steady.
If you put a call on hold, the green light starts winking. As
a reminder, the wink rate increases when a call has been on
hold longer than a pre-administered period. The special
conference hold condition is indicated by broken fluttering.
Status light rates:
• Flash - Slow on/off; repeated.
• Wink - Long on/short off; repeated.
• Broken flutter - Fast on/off for 1/2 second, then dark
for 1/2 second; repeated.
Most feature buttons have no lights, but some have either a
red and a green light or a single green light. The red lights
are inoperative on feature buttons.
The lights of the Selector Console enable you to monitor the
on/off-hook status of system stations. If you press a Group
Select button while you are "on-hook" at the SLAC, the
DXS lights of any off-hook stations in that group will turn
on steadily.
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