With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dsx3CircuitIdentifier
dsx3 Circuit Identifier
1.3.6.1.2.1.10.30.5.1.8
This variable contains the transmission vendor's circuit identifier, for the purpose of facilitating troubleshooting.
Back to DS3-MIB MIB page.
IPHost Network monitor allows you to monitor dsx3CircuitIdentifier 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.