ccasIfExtVariantTable
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.
This OID is also declared by other modules:
CISCO-CAS-IF-EXT-MIB