Panasonic KX-NCP500 User Manual page 84

PT/PS
During 3- to 7-party conference
CONF
Press CONF.
PT/PS
OR OR
(CO) (ICD Group)
Press flashing green CO, ICD Group, PDN, SDN, or INTERCOM.
PT/PS
During a conversation
On-hook.
On-hook.
OR
(PDN) (SDN)
INTERCOM
OR