Panasonic KX-TD816NZ - Manual (Page 57)

2.4 During a Conversation
Operation
57
2.4.2 Talking to Two Parties Alternately (Call Splitting)
When talking to one party while the other party is on hold, you can swap the calls back and forth
(alternately).
To alternate the call between the parties while having a call on hold temporarily
To alternate the call between the parties while having a call on exclusive hold
During a conversation with a held call
Press TRANSFER
or hookswitch.
OR
PT / SLT
TRANSFER
PT
Press HOLD.
Press HOLD.
Press CO or INTERCOM.
When either party is an outside party
During a conversation with a held call
When both parties are extension parties
During a conversation with a held call
Repeat to
alternate
HOLD
INTERCOM
OR
(CO)
HOLD