Iwatsu ICON Series IX-5910 Owner's Manual page 297

Key Lamp Indication for Day-1, Day-2, Day-3, and Night Mode
The Group Night Mode key will change the LED lamp status based on the
Group Ringing mode. The LED lamp indication is reflected for the ringing
mode on all Iwatsu telephones (legacy and ICON Series) with a Night Mode
key.
Day-1 Ringing Mode = No lamp indication.
Day-2 Ringing Mode = Slow red flash.
Day-3 Ringing Mode = Fast red flash.
Night Ringing Mode = Solid red flash.
Note: Iwatsu ICON Series Self-Labeling Key name change is not supported
with the Multiple Ringing Mode.
Multiple Ringing Mode Conditions
Legacy Telephones: Legacy telephones, Attendant Consoles,
and ICON Series IX-5800/5900 telephones, assigned as
attendant positions cannot access the Day-2 and Day-3 modes.
These telephones can only switch between Day (Day-1) and
Night modes. The legacy Day / Night mode operation remains
the same as in previous software versions.
ACD Night: This enhancement will not affect ACD
functionality, ACD Night maintains the existing toggle
operation (Day or Night).
Universal Night Answer (UNA): Universal Night Answer will
operate only if a system is in the Night Mode.
Attendant Intercept (UCD): Attendant Intercept will operate if
a system is in the Day-1, Day-2 or Day-3 mode (Night Mode
not supported).
Licensing: The Multiple Ring Mode application requires ECS
software version 8.0x license (part number 000347). A system
without a version 8.0x license will not have access to the
Multiple Ring Selection menu. The legacy Day / Night mode
operation remains the same as in previous software versions.
Iwatsu ICON Series Self-labeling key name change is not
supported with the Multiple Ringing Mode.
ATTENDANT POSITION USER GUIDE - 277