Panasonic KX-NCP500 Operating Manual page 37

SLT
During a conversation
Press Recall/
hookswitch.
SIP Extn.
During a conversation
HOLD
Press HOLD.
Document Version 2010-08
5 0
C.Tone
Enter 50.
On-hook.
On-hook.
1.3.6 Call Hold
Operating Manual 37