Yealink SIP T2 Series Provisioning Manual page 105

Parameter
features.headset_prior
features.headset_training
Permitted
Descriptions
Values
If it is set to 0 (Disabled), the IP phone cannot log
the placed calls, received calls, missed calls and
the forwarded calls in the call log lists.
The default value is 1.
It enables or disables headset prior feature. You
need to press the HEADSET key to activate the
headset mode in advance.
0-Disabled
1-Enabled
If it is set to 1 (Enabled), the headset mode will not
0 or 1
be deactivated until you press the HEADSET key
again.
If it is set to 0 (Disabled), the headset mode can be
deactivated by pressing the speakerphone key or
the HEADSET key except the HANDSET key.
The default value is 0.
It enables or disables dual headset feature.
0-Disabled
0 or 1
1-Enabled
If it is set to 1 (Enabled), users can use two
headsets on one phone. When the IP phone joins in
Appendix
Web Setting Path
Features->General
Information->Headset Prior
Features->General
Information->Dual-Headset
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