Incoming SIP Trunking calls from Service Provider to Session Manager are failing because Avaya Session Border Controller for Enterprise (SBCE) is not sending a domain name in the TO, FROM and REQUEST headers.
What needs to be changed in SBCE to make this happen?
To ensure that Avaya Session Border Controller for Enterprise (SBCE) sends a domain name in the TO, FROM, and REQUEST headers for incoming SIP Trunking calls, navigate to the SBCE GUI. Go to Global Profiles, then Topology Hiding. Edit the SessionManager_TH profile to change the action for the To, From, and Request Headers to 'Overwrite with domain name.' This will ensure that the required domain name is included in these headers.
"C" es correcta Global Profile -> Topology Hiding -> Topology Hiding Profile -> "Name Profile" -> Overwrite Value
Answer D is not a complete answer. Answer C is correct because it is the Topology Hiding feature that sets/overwrites the domain name.