Look at ICDG Group settings, 5.1
EG ICDG601-(OVFL Que Busy)set Capacity for how many calls you want waiting in the Queue before OVFL.
(OVFL Queue No/Ans) set a time for OVFL No/Ans, say 60sec.
(Queue time table)pick one.
(Misc)set for how you want your operators to work & set the Group supervisor(needs KX-T7636)
5.2
(Queueing Time table)to have MOH in the Queue you must put OGM1(even if you don't have an OGM card in your system)
set your sequence of events here
EG: OGM1-wait 15sec-OGM2-Sequ2
This will give EG: you Have been placed in a Queue-MOH 15sec-Thanks for Waiting-Repeat MOH&thanks until Operator is free or OVFL.
Click on the help while you are on a screen for detail