Panasonic KX-TD500 - Secret Busy Override

Station Features and Operation (PT/SLT)
368 User Manual
4.3.69 Secret Busy Override
You can interrupt an existing call (either "between two inside parties" or "between an inside
party and an outside party") without informing the other party.
Some extensions may be restricted from performing this function.
To interrupt an existing call
To change to the three-party conference call
7230 / 7235 / 7433 / 7436
Dial 2.
If you hear a busy tone after making an intercom call;
2
Over
S1
S2
S3
If you hear a busy tone after making an intercom call;
Press Over (S2).
PT and SLT
Lift the handset or press
SP-PHONE/MONITOR.
Lift the handset or press
SP-PHONE/MONITOR.
Party A and Party B in conversation do not know
that their conversation is being monitored by Party C.
Party A and Party B in conversation do not know
that their conversation is being monitored by Party C.
PT
Press the ICM or DN
corresponding to the
desired caller.
A three-party conference
is now established.
or
(ICM) (DN)
When “Secret Busy Override” is executed.