Yealink SIP-T2xP Auto Provisioning Manual page 115

Parameter
transfer.multi_call_trans_enable =
(not applicable to SIP-T20P , CP860 and SIP-T4X IP
phones)
transfer.tran_others_after_conf_enable =
voice.vad =
Permitted Values
0-New Call
1-Attended Transfer
2-Blind Transfer
The default value is 2.
It enables or disables the phone to enter
Transfer to menu during multiple calls when
pressing the transfer soft key or TRAN key.
0 or 1
0-Disabled
1-Enabled
The default value is 1.
It enables or disables the phone to transfer
call to the two parties after a local
conference call hangs up.
0 or 1
0-Disabled
1-Enabled
The default value is 0.
It enables or disables VAD (Voice Activity
Detection) feature.
0 or 1
0-Disbaled
1-Enabled
Descriptions
Features->General Information->
Allow Trans Exist Call
Features->Transfer ->Transfer on
Conference Hang up
Settings->Voice-> Echo Cancellation
->VAD
Appendix
Web Setting Path
105