Panasonic KX-TD500 User Manual page 312

Station Features and Operation (PT/SLT)
Executing
7230 / 7235 / 7433 / 7436
If you hear a busy tone after making an intercom call;
BSS
S2
S1
Press BSS (S1).
PT and SLT
If you hear a busy tone after making an intercom call;
1
Dial 1.
To talk to the third party
7130 / 7235 / 7436
If OHCA is activated by the other party when you are engaged in a call using the handset, you
hear a confirmation tone and then the caller's voice through the built-in speaker of your PT.
Speak with the third
party through microphone.
The caller's number and name are shown on the display for
five seconds in 10 seconds intervals.
<PT Display Example>
123:Tony
You can talk to two parties individually.
312
S3
Confirmation tone
Confirmation tone
Caller's extension number
Wait for an
answer and talk.
Wait for an
answer and talk.
User Manual