With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoAtmIfPhysTransmitClockSource
cisco Atm If Physical Transmit Clock Source
1.3.6.1.4.1.9.9.45.1.1.1.16
The source of the tranmit clock: 'loopTiming' indicates that the recovered receive clock is used as the transmit clock. 'freeRunning' indicates that a local clock source is used. 'networkDerived' indicates that recovered receive clock from another interface is used as the transmit clock source.
Back to CISCO-ATM-IF-PHYS-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoAtmIfPhysTransmitClockSource on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.