Panasonic KX-NS1000 Operating Manual page 236

1.15.1 Cellular Phone Features
Adding Other Parties during a Conversation (Conference)
To establish a conference call
Cellular Phone
During a conversation
D.Tone
Enter #.
Talk with multiple parties.
Talking to Two Parties Alternately (Call Splitting)
Cellular Phone
During a conversation
OR
Enter #.
236 Operating Manual
extension no.
Dial extension number.
extension no.
D.Tone
Dial extension number.
Talk to the Enter #.
new party.
Talk to the
other party.
3
C.Tone
Enter 3.
Enter #.
Talk to the
original party.
The other party will be on hold.