With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ccasIfExtVariantTable
Cisco CAS If Ext Variant Table
1.3.6.1.4.1.9.9.314.1.2.2
This table specifies a list of CAS signaling protocols such as R2 CAS, Feature Group D Oprerator Services ( FGD OS). Each CAS variant is downloaded to and parsed by the media gateway. A CAS variant can be applied to a DS0 group of the DS1 line with CAS signaling. A DS1 line is configured for CAS signaling when its dsx1SignalMode is set to 'robbedBit(2)' for T1 or 'bitOriented(3)' for E1.
Back to CISCO-CAS-IF-EXT-MIB MIB page.
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