The information regarding a single HDLC call leg.
An entry of this table is created when its associated call
history entry in the IETF Dial Control MIB is created and the
call history entry contains information for the call
establishment to the peer on the data network backbone via a voice
over HDLC peer.
The entry is deleted when its associated call history entry in
the IETF Dial Control MIB is deleted.