The information regarding a single VoIP call leg.
The call leg entry is identified by using the same index
objects that are used by Call Active table of IETF Dial
Control MIB to identify the call.
An entry of this table is created when its associated call
active entry in the IETF Dial Control MIB is created and
the call active entry contains information for the call
establishment to the peer on the IP backbone via a voice
over IP peer.
The entry is deleted when its associated call active entry
in the IETF Dial Control MIB is deleted.