With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipStatsClientBadExtensionOuts
Cisco Sip Stats Client Bad Extension Outs
1.3.6.1.4.1.9.9.152.1.2.4.32
This object reflects the total number of Bad Extension (420) responses sent by the user agent since system startup. Outbound Bad Extension responses indicate that this system did not understand the protocol extension specified in a Require header field of requests.
Back to CISCO-SIP-UA-MIB MIB page.
IPHost Network monitor allows you to monitor cSipStatsClientBadExtensionOuts on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.
