Avaya 1200 - Manual (Page 139)

While on an active call
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To make a call on hold the active call:
Using call conferencing
You can use the Conference feature to establish a conference call
between the active call and calls on hold. The Conference feature is
available when you are on an active call.
Chad
2. To retrieve the highlighted call on hold
do one of the following:
— Press the Line feature key beside
the flashing LCD indicator.
— Press the Hold fixed key to retrieve
a call on hold.
1. Press the Up/Down navigation key to
highlight a call on hold.
Actvate 2. Press the Activate context-sensitive soft
key to make the highlighted call on hold
the active call.
This removes the call from on hold and
automatically places the previous call on
hold.