Panasonic KX-TD500 User Manual page 550

Appendix
example, to set Call Waiting, the feature number for "Call Waiting" must be followed by "1"
and to cancel it, the same feature number should be followed by "0."
• Fixed Feature Numbers Type-1 or Type-2 can be selected by System Programming.
(Default = Type-1)
Programming Guide References
• 1.4 Extension Port Assignment
– Attribute
– DN
• 2.3 Numbering Plan
• 2.8 System Option
– Fixed Feature Number
Features Guide References
1.3 System Features
• Flexible Numbering
User Manual References
None
550 User Manual