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54
C
4: S
HAPTER
TANDARD
Setting the Volume
F
EATURES
for a call back. The range for this timer is 1 minute to 24 hours with
the default being 12 hours. If the Callback is not received within this
time, the system cancels the Callback.
An extension can have up to five Automatic Callback requests
assigned to it. Return call backs are generated in the order that they
were received (FIFO).
Events that generate a call back from the destination extension
include:
Entering a feature code followed by an on-hook event
Invoking Directory followed by an on-hook event
Going off-hook then on-hook
Using Feature + 111 to terminate a session
You cannot initiate an Automatic Callback to:
An external number
An ACD extension
A Hunt Group extension
A TAPI RoutePoint extension
A Call Park extension
An extension receiving a transferred call
A Phantom extension
You cannot initiate Automatic Callback to a device connected to an
Auto Attendant or Voicemail.
If Call Forward All or Do Not Disturb is enabled on the Automatic
Callback destination extension, a Fast Busy tone (indicating Automatic
Callback not allowed) is received at the telephone attempting to
initiate the Automatic callback.
For additional tips and considerations on using Automatic Callback, see
your NBX system administrator.
On any 3Com Telephone, use the Volume Control buttons to raise or
lower one of these volumes:
Ring Volume — To raise or lower the volume of the ring, press the up
or down Volume Control button repeatedly while your telephone is
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