Accept Sip Trust Server Only - Yealink SIP-T2 SERIES Administrator's Manual

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
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To configure allow SIP IP call feature via web user interface (take SIP-T23G IP phones for
example):
Click on Features->General Information.
1.
Select the desired value from the pull-down list of Allow IP Call.
2.
Click Confirm to accept the change.
3.

Accept SIP Trust Server Only

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 SIP IP
call feature. For more information on allow SIP IP call, refer to
Procedure
Accept SIP trust server can be configured using the configuration files or locally.
Configuration File
Local
310
Parameter
<y0000000000xx>.cfg
Web User Interface
Permitted Values
Allow SIP IP Call on page 308.
Configure accept SIP trust server.
Parameter:
sip.trust_ctrl
Configure accept SIP trust server.
Navigate to:
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SIP-T48G/T46G/T42G/T41P/T40P/T2
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