The information regarding a single voice encapsulation
call leg.
The call leg entry is identified by using the same index
objects that are used by call active table of
DIAL-CONTROL-MIB to identify the call.
An entry of this table is created when its associated call
active entry in the DIAL-CONTROL-MIB is created and
call active entry contains the call establishment to a
voice over telephony network peer.
The entry is deleted when its associated call active entry
in the DIAL-CONTROL-MIB is deleted.