This table contains statistics information for an AAL1
trunking connection.
Each entry in this table corresponds to an AAL1 connection
that has been setup by binding an DS0 to an AAL1 connection
identified by (ifIndex, catmtAal1Vpi, catmtAal1Vci).
The entries in this table are implicitly created/deleted
at the time of creation/deletion of entries in the
catmtAal1Table.