Panasonic GD76 - Manual (Page 54)

Call Transfer
With two calls connected, Call Transfer enables the user to connect them
together ending your connection, leaving the other parties to talk together.
(Q)
When two calls are in use:
1 Z Q
2 Use e to select Trans. Z Q
The two calls will be connected to each other and your call will be ended.
Note: Two call transfer cannot be utilized while in Multi-party mode.
Multi-party Calls
A Multi-party call enables three to five people to be in conversation at the
same time. It is possible to swap between a Multi-party call and another call
in the same way as with two separate calls. (Q)
Enabling Multi-party
With two calls connected (one active, one on hold):
1 Z Q
2 Use e to select Merge Z Q
A Multi-party call has been enabled, all three people will be able to talk to
each other.
Adding to Multi-party
It is possible to add to the Multi-party call (up to a maximum of five). Either
by making a call or accepting an incoming call. The call can then be merged
into the Multi-party.
Note: When making a call or accepting an incoming call the Multi-party call
will be placed on hold. The callers in the Multi-party call can continue to
communicate with each other while on hold.
Splitting a Multi-party
The user can select an individual from the Multi-party and remove their
connection. This enables you to talk privately without the participation of
the rest of the Multi-party.
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Advanced Operation