Siemens 300 Series User Manual page 50

• Trunk Queuing - directs the CBX to help you
complete your call when you are trying to reach an
outside number and all trunks (outside lines) in
your company's system are busy. Trunk Callback
Queuing lets you hang up and have the CBX call
you back when a trunk becomes free. After you
answer, the CBX dials the number. Trunk Standby
Queuing lets you stay on the line until a trunk
becomes free. The CBX then dials the number. (See
"Trunk Queuing" on page 3–40.)
2–12 ROLMphone 300/600 User Guide