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Navigate to the sip-port configuration element and set the nat-traversal parameter to disabled

Navigate to the sip-interface configuration element and set the nat-traversal parameter to never. 

Navigate to the sip-interface configuration element and set the nat-traversal parameter to always

 Navigate to the sip-port configuration element and set the nat-traversal parameter to enabled. 

Navigate to the sip-interface configuration element and set the nat-traversal parameter to detect

It is necessary to locate the SIP session to troubleshoot and check if there is a 404 Routes Not Found SIP error message.

It is recommended to look for 183 Session Progress SIP error messages that indicate routing issues. 

t is recommended to check the called number by looking at the Request-URI of the INVITE message and making sure it is a validnumber to be routed.

It is recommended to find the CANCEL method received by the Session Border Controller which typically identifies a SIP routing issue.

It is necessary to find an initial INVITE received by the Session Border Controller which getsa 503 Service Unavailable SIP error message. 

Navigate to the network-interface configuration element and set the sub-port-id parameter to 12.

Navigate to the network-interface configuration element and set the sub-port-id parameter to 0. 

Navigate to the phy-interface configuration element and configure the pri-utility-address parameter.

Navigate to the network-interface configuration element and configure the name parameter.

Navigate to the sip-interface configuration element and set the dialog-transparency parameter to disabled

Navigate to the sip-config configuration element and set the dialog-mapping parameter to disabled.

Navigate to the sip-config configuration element and set the call-id-transparency parameter to disabled.

Navigate to the sip-config configuration element and set the dialog-transparency parameter to disabled.

Navigate to the sip-config configuration element and set the dialog-transparency parameter to enabled.