Panasonic KX-TD308 Installation Manual page 91

Features
Programming References
Feature References
Operation References
-User Manual
Class of Service programming determines the extensions that are able to
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perform this function.
If an extension is limited by the program [502] "Extension-to-Outside
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Line Call Duration Limit" according to its Class of Service, the
extension is unable to forward an outside call to an outside line.
If a call between an extension and an outside party is established by this
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feature, the duration of the call period can be restricted'depending on
the setting of the system timer. If a call between two outside parties is
established by this feature, the duration of the call is determined by
another system timer. An alarm tone is generated to both outside
parties 15 seconds before the time-out. The call is disconnected at the
time-out.
Section 4, System Programming
[ 1001 Flexible Numbering, Call forwarding / do not disturb
Station Programming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User Manual
Flexible CO Button Assignment - FWD/DND Button
Section 3, Features
Limited Call Duration
DPT Features, Standard Telephone Features
Call Forwarding - to Outside Line
C
Features 3-31