I’m having an issue with incoming calls via sip, outgoing is fine. I suspect it’s something to do with NAT. There is an ASA firewall in front of the CME router that should be taking care of NAT via 1:1 translation and inspect sip. I have attached a CCSIP debug – any comments greatly appreciated. The firewall and the CME router is on the 192.168.74.0 network.
Is 192.168.120.124 your CME router?
SIP inspection on ASA normally should be in there,
You can see "invalid host' error on the debug, need to make sure firstname.lastname@example.org is a valid SIP address,
Need to post the config.
Who is the SIP provider?
Some SIP providers send inbound calls from a different IP then you send your outbound calls to. They also like to initiate the connection on one IP and switch to another once the invite has been acknowledged. When debugging inbound calls do you see the calls hitting the CME?
Can you also post your CME config and ASA config?
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Can you post from the asa the show run and also:
debug sip ha
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