User guide

Yealink SIP-T4X IP Phones Auto Provisioning Guide
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1-Attended Transfer
2-Blind Transfer
The default value is 2.
transfer.tran_o
thers_after_co
nf_enable =
0 or 1
It enables or disables the phone to
transfer call to the two parties after a
local conference call hangup.
0-Disabled
1-Enabled
The default value is 0.
Features->Transfer
->Transfer on
Conference Hang
up
voice.vad =
0 or 1
It enables or disables the voice activity
detection.
0-Disbaled
1-Enabled
The default value is 0.
Settings->Voice->
Echo Cancellation
->VAD
voice.cng =
0 or 1
It enables or disables the comfortable
noise generator.
0-Disabled
1-Enabled
The default value is 1.
Settings->Voice->
Echo Cancellation
->CNG
voice.echo_ca
ncellation =
0 or 1
It enables or disables the echo
canceller.
0-Disabled
1-Enabled
The default value is 1.
Settings->Voice->
Echo Cancellation
->ECHO
voice.jib.adap
tive =
0 or 1
It configures the type of jitter buffer.
0-Fixed
1-Adaptive
The default value is 1.
Settings->Voice->
JITTER BUFFER
->Type
voice.jib.min
=
Integer
from 60 to
300
It configures the minimum delay (in
milliseconds) of jitter buffer.
The default value is 60.
Settings->Voice->
JITTER BUFFER ->
Min Delay
voice.jib.max
=
Integer
from 60 to
300
It configures the maximum delay (in
milliseconds) of jitter buffer.
The default value is 300.
Settings->Voice->
JITTER BUFFER
->Max Delay
voice.jib.norm
al =
Integer
from 60 to
300
It configures the normal delay (in
milliseconds) of jitter buffer.
The default value is 120.
Settings->Voice->
JITTER BUFFER ->
Normal