Panasonic KX-NCP500 - Manual (Page 39)

SLT
During a conversation
On-hook. Enter 50. Press Recall/
hookswitch.
0 5
C.Tone
SIP Extn.
During a conversation
On-hook.
HOLD
Press HOLD.
Document Version 2008-09 Operating Manual 39
1.3.6 Call Hold