The following table lists the parameters you can use to configure accept SIP trust server only

Parameter DBID_SIP_CHECK_INCOMING_IP_ADDRE
Description It enables or disables the phone to only accept the SIP message from the SIP and outbound proxy server.
Permitted Values 0-Disabled
1-Enabled, users cannot accept the IP call
Default 0
Web UI SIP Account > Line X [1] > Advanced > SIP Advanced Setup > Only Recv Request From Server
Parameter DBID_SIP_ALLOWED_IP_ADDRS
Description It configures the IP address of the receiving server.
Note: It works only if “DBID_SIP_CHECK_INCOMING_IP_ADDRE” is set to 1.
Permitted Values IP Address
Default Blank
Web UI SIP Account > Line X [1] > Advanced > SIP Advanced Setup > Server Address

[1] X is the account ID. X = 1-4

Author：admin  Create time：2023-08-30 17:26
Last editor：admin  Update time：2023-12-22 13:50