An entry of sonusAtmExtOamF5Table which is used to provide OAM feature for
Virtual circuit in this ATM interface. Three major OAM functions are
supported in this MIB entry. The first function is the Loopback
capability for this virtual circuit which includes both of End2end
Loopback and UNILoopback. The second function is the OAM continuity
capability for this virtual circuit which uses Loopback cells to
transmit periodically. Transmit and recieve loopback cell statisitics
can be used to determine if there is continuity.
The third function is basic fault management feature using
AIS/RDI cells to inform the upstream/downstream failure condition,
the counters are used to keep failure statistics.