Avaya NN43170-100 - Manual (Page 220)

While on an active call
220
Figure 32: 3-way Call
Note 1: If you receive a new call during a 3-way call, you can answer
the new call as usual. The Avaya 1165E IP Deskphone automatically
puts the 3-way call on hold. If you want to join the new caller to a 3-
way call, you must initiate a conference call with the server and join
all callers to the conference call.
Note 2: If the host of a 3-way call presses the hold button, all callers
in the 3-way call are put on hold.
Note 3: If the host of a 3-way call presses the Goodbye fixed key or
selects Release Call from the Action menu, all calls in the 3-way call
are terminated.