With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpmUserIpAddr
cpm User Ip Addr
1.3.6.1.4.1.9.10.19.1.4.3.1.5
The IP address of the call or 0.0.0.0 if unavailable. This object comes directly from IOS.
Back to CISCO-POP-MGMT-MIB MIB page.
IPHost Network monitor allows you to monitor cpmUserIpAddr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco mobile switches right now.