With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c3gPreviousServiceType
Cisco 3G Previous Service Type
1.3.6.1.4.1.9.9.661.1.1.1.4
This object indicates the previous service type when service type changes.
Back to CISCO-WAN-3G-MIB MIB page.
IPHost Network monitor allows you to monitor c3gPreviousServiceType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.
