Panasonic KX-T336 System Reference Manual page 278

An outline sketch of UCD is shown below.
(1)When a number of calls have been arrived at
a UCD group, the 1st call arrives at extension
A first.
Calls have arrived at a UCD group
4th call
is in the queue
3rd call
is in the queue
2nd call
is in the queue
1st call
is in the queue
UCD group
Extension A
(When extension A is busy*
or in UCD logout*
call arrives at extension B.)
Extension B
(When extension B is busy
or in UCD logout mode, the
call arrives at extension C.)
Extension C
(When extension C is busy
or in UCD logout mode, the
call arrives at extension D.)
Extension D
(When extension D is busy
or in UCD logout mode, the
call arrives at extension A.)
(2)When the 1st call arrives at extension A, the
2nd call arrives at extension B.
UCD group
Extension B
Extension C
Extension D
1
2 mode, the
Extension A
(3)When the 2nd call arrives at extension C,
the 3rd call will arrive at extension D.
(4)When the 3rd call arrives at extension D,
the 4th call will arrive at extension A.
[Note]
* 1 Busy status
• When "Do Not Disturb (DND)" or "Call
Forwarding" has been set to the extension.
• When any one of PDN is used.
(Including using own PDN as an SDN at
another extension)
• When the extension is off-hook.
* 2 Logout
Members can leave the group temporarily, to
prevent calls being sent to their extension.
3-D-10
(40993)
4th call
is in the queue
3rd call
is in the queue
2nd call
is in the queue
(When extension B is busy
or in UCD logout mode, the
call arrives at extension C.)