Panasonic KX-TVM50 Programming Manual page 124

2.5 System Parameters
Value Range
1 s–10 s
Feature Guide References
2.3.29 Message Waiting Notification—Device
System Callback No.
Specifies the telephone number that will be displayed on the subscriber's beeper (pager) to indicate
the phone number the subscriber should call back. The system callback number is displayed when
"Beeper Callback No. Entry Mode" is disabled, or when the caller does not enter his or her phone
number when prompted to by the VPS. In order to use this feature, the callback number entry code
"X" must be added to the end of the subscriber's beeper (pager) number when stored in the VPS.
Note
• If "Beeper Callback No. Entry Mode" is enabled through COS, the callback number entered
by the caller will display on the destination beeper (pager). However, if the caller fails to enter
a callback number, the System Callback No. will display instead.
Value Range
Max. 32 digits
Feature Guide References
2.3.29 Message Waiting Notification—Device
External Message Delivery
Determines how essential External Message Delivery features are carried out.
Retry Times
Specifies the number of times the VPS will attempt to deliver an external message when the
destination is busy or does not answer.
Value Range
0–9 times
Feature Guide References
2.4.12 External Message Delivery Service
Busy Delay
Specifies the length of time (in minutes) the VPS waits to try to deliver an external message again
when the destination is busy.
124 Programming Guide