Using Call Queuing - Nortel Modular ICS 6.0 Manual

Using Call Queuing

If you have more than one call ringing at your telephone, use
this feature code to choose the call that has the highest priority.
Call Queuing answers incoming external calls before callback,
camped, and transferred calls.
P0992640 03
Handling many calls at once / 91
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Modular ICS 6.0 System Coordinator Guide