Yealink SIP-T27P [256/841] Details of configuration parameters

Yealink SIP-T27P [256/841] Details of configuration parameters
Administrators Guide for SIP-T2 Series/T19(P) E2/T4 Series IP Phones
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2. Select the desired value from the pull-down list of Allow IP Call.
3. Click Confirm to accept the change.
Accept SIP trust server only enables the IP phones to only accept the SIP message from
your SIP server and outbound proxy server. It can prevent the phone receiving ghost
calls from random numbers like 100, 1000, etc. To stop this from happening, you also
need to disable allow IP call feature. For more information on allow IP call, refer to Allow
IP Call on page 239.
Procedure
Accept SIP trust server can be configured using the configuration files or locally.
Configuration File
<y0000000000xx>.cfg
Configure accept SIP trust server.
Parameter:
sip.trust_ctrl
Local
Web User Interface
Configure accept SIP trust server.
Navigate to:
http://<phoneIPAddress>/servlet
?p=features-general&q=load
Details of Configuration Parameters:
Parameters
Permitted Values
Default
sip.trust_ctrl
0 or 1
0

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