Panasonic KX-T336 System Reference Manual page 1215

50.00 Automatic Busy-out Count (ABC)
Description
It is administrable to busy out the invalid CO line automatically to prevent
extension users from accessing it by monitoring the loop current sent through
CO line.
(Password level: Three or higher)
One of the following three options is assignable on a CO line basis.
(1) N=0
On CO calls, the system monitors a loop current sent through the CO line,
and if a loop current is not detected, busy tone is sent to the caller.
(2) N=1 to 240
On CO calls, the system monitors a loop current sent through the CO line,
and if a loop current is not detected pre-assigned times (1 to 240)
consecutively, busy tone is sent to the caller.
Then the system busies out the corresponding CO line automatically.
(3) N=241
On CO calls, the system does not monitor the loop current sent through the
CO line, therefore, CO line is always seized by extension users whether
loop current is running or not.
Refer to Section 52.00 "WS 2" L-COT/G-COT Busy Out Looprelay.
Input Format
Mode
A B C
Index Number
Index Number
1011 to 3158
Input Value for Item Number
I t e m
Assigning Items
N u m b e r
N o n e
Automatic Busy-out Count
Index Number CR
xxx (0 to 241)
0:
1 to 240 :
241 :
(Default = 241)
10-C-76
Explanation
Physical Number of the Trunk Port
Input Value
(Loop Current Detection)
Yes
Yes
No
(Automatic Busy-out)
No
Yes
if loop current is not
detected by the pre-
assigned times (1 to 240)
No