Panasonic KX-TD500 User Manual page 318

Station Features and Operation (PT/SLT)
To talk to the third party by terminating the current call in hands-free mode
7420 / 7425 / 7431 / 7433 / 7436
If Whisper OHCA is activated by the other party when you are engaged in a call, you hear a
confirmation tone. Then you will be engaged in both calls with the current caller (two-
way) and the third party (one-way).
Hang up.
The current call is disconnected.
The INTERCOM indicator light
turns green.
To talk to the third party by terminating the current call in handset mode
7420 / 7425 / 7431 / 7433 / 7436
If Whisper OHCA is activated by the other party when you are engaged in a call, you
hear a confirmation tone. Then you will be engaged in both calls with the current
caller (two-way) and the third party (one-way).
INTERCOM
Press INTERCOM.
The current call is disconnected.
The INTERCOM indicator light turns green.
318
You can talk in hands-free
mode.
FLASH
or
Press FLASH.
Speak with the third
party through microphone.
Talk.
You can talk in handset mode.
User Manual