Panasonic KX-TD500 Features Manual page 139

(1) Outline sketch of UCD feature
1. When more than one call is in the UCD group, the 1st call will arrive at extension A first.
Calls have arrived at a UCD group
3rd call in queue
2nd call in queue
1st call in queue
UCD group
Features Guide
Extension A
(When extension A is busy
or logged-out, the call
arrives at extension B.)
Extension B
(When extension B is busy
or logged-out, the call
arrives at extension C.)
Extension C
(When extension C is busy
or logged-out, the call
arrives at extension A.)
General Features
139