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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

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.

an IP address and port the Session Border Controller uses for steering media to the external media server

an IP address and range of ports the Session Border Controller will use to declare itself as the destination for media flows in a session

a range of IP addresses and a pool of ports the Session Border Controller will use to declare itself as the destination for all subsequent media flows in a dialog

arange of IP addresses used to route media flows as they egress the Session Border Controller

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.