User guide
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Yealink Manuals
Computer equipment
SIP-T4X
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Append
ix
49
10.
Sc
roll down and d
ou
ble clic
k th
e custom optio
n 128.
11.
Fill the provisioning serve
r addr
ess
in the input field.
12.
Click the
OK
button to finish setting
a custom option.
13.
Click
to save the chan
g
e.
1
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