NEC UNIVERGE SV8100 Features & Specifications Manual page 703

UNIVERGE SV8100 Issue 5.0
Figure 1-12 Example - Callback to Cell Phone
Conditions
Mobile Extension must be programmed for this feature to work.
In the Callback to Cell Phone feature set Program 15-22-04 to 1. If the Cell Phone user
continues to ring over the time set in Program 22-01-12, the system answers the call as a
normal Mobile Extension call.
Callback to Cell Phone will not proceed and no retry is made if all trunks are busy when
trying to callback.
Callback trunk routing follows Program 15-22-03 setting. When set 0 (Normal trunk access
code), ARS also can be used.
If Mobile Extension does not answer the Callback within time set in Program 20-01-16,
Callback will stop. If answered the within the Callback time, the user hears an extension
dial tone. A splash tone is not heard.
If the system receives a "Disconnect" from the far end after a Callback is made, Callback
will stop.
When Calling party number is used, Callback follows the Program 21-xx outgoing call
setting of the Mobile Extension which made the outgoing call.
Mobile Extension 1 - 693