With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cSipStatsMisc3xxMappedTo4xxRsps
Cisco Sip Stats Misc3xx Mapped To4xx Rsps
1.3.6.1.4.1.9.9.152.1.2.9.1
This object reflects the total number of incoming Redirect (3xx) response messages that have been mapped to Client Error (4xx) response messages.
Back to CISCO-SIP-UA-MIB MIB page.
IPHost Network monitor allows you to monitor cSipStatsMisc3xxMappedTo4xxRsps on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.