With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipStatsClientNotFoundOuts
Cisco Sip Stats Client Not Found Outs
1.3.6.1.4.1.9.9.152.1.2.4.10
This object reflects the total number of Not Found (404) responses sent by the user agent since system startup. Outbound Not Found responses indicate that this system knows that the called party does not exist at the domain specified in the Request-URI or the domain is not handled by this system.
Back to CISCO-SIP-UA-MIB MIB page.
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