Panasonic KX-TD500 - Off-Hook Monitor

Station Features and Operation (PT/SLT)
User Manual 321
4.3.51 Off-Hook Monitor
While you are on a handset call, your call can be monitored by the other people in the room
through SP-PHONE.
Setting
Switching from off-hook monitor to handset call
Switching from off-hook monitor to hands-free mode
DPT
The SP-PHONE indicator light turns red.
Your handset call is heard through the
SP-PHONE.
While on a handset call;
SP-PHONE
Press SP-PHONE.
While in the off-hook monitor mode;
SP-PHONE
Press SP-PHONE.
The SP-PHONE indicator light turns off.
Off-hook monitor mode is canceled and handset call mode is established.
DPT
While in the off-hook monitor mode;
Off-hook monitor mode is canceled and hands-free mode is established.
Hang up.
DPT