Panasonic KX-TD500 System Reference Manual page 597

5.00 Executive Busy Override
Description
Executive Busy Override allows an extension
user to intrude on a busy line, and then a 3-party
conversation is established. This feature is
accessed by dialing "1" while hearing busy tone.
To utilize this feature, assign "System-Class of
Service", Executive Busy Override to "Yes", at
overriding extension.
Setting can be made by system programming
"System-Operation", Beep Tone for Bsy-ovr/Brg-
in to determine whether the overriding tone is be
sent or not when entering into a three-person
conversation.
Programming
System Programming
"System-Operation (1/3)",
Beep Tone for Bsy-ovr/Brg-in
"System-Class of Service (1/3)",
Executive Busy Override
Conditions
Executive Busy Override does not function when
the other party is in the following status.
• Three-party conversation status
• OHCA conversation status
• ICM conversation status
• Private CO conversation status
Executive Busy Override does not function if any
of two parties in conversation has set the
followings.
• Executive Busy Override Deny
(Refer to Section 4-D-5.00.)
• Data Line Security
(Refer to Section 4-I-6.00.)
If you do not dial "1" within 10 seconds after
hearing busy tone, you cannot execute this
function.
Reference
VT Dumb
10-D-1.01 11-C-4.00
10-D-4.01 11-C-7.00
5-A-17
Operation
1. Lift the handset.
• You hear dial tone 1, 3, or 4.
2. Dial the directory number of the
other extension.
• You hear busy tone 1 or 2.
3. Dial "1".
• After you hear confirmation
tone 3, start a three party
conversation.