Avaya 1210 - Manual (Page 77)

Operating your Avaya 1210 IP Deskphone
77
Switching from handsfree to headset
Use the following procedure to switch from handsfree to headset.
Using Predial
Use the Predial feature to enter, preview, and edit numbers before you
make a call.
Making a call
Use the following procedure to make a call using the Predial feature.
2. Press the Headset key.
1. Press the Headset key.
1. Enter the number to be dialed.
2. Press a Handsfree key.
3. Lift the Handset when the called party
answers.
or
Begin to speak. You are in handsfree
mode.