Description: This is an entry in the DPNSS Trunk Mapping table. There is a entry in this table corresponding to each DPNSS trunk ifEntry. This table is intended to facilitate mapping from DPNSS signaling channel ifEntry/DPNSS trunk number to the DPNSS trunk ifEntry. (e.g. mapping (DPNSS signaling channel ifIndex, DPNSS trunk number) -> DPNSS trunk ifIndex.

While this table provides information that can also be indirectly derived from the ifStackTable using the ds0 & ds1 MIBs, it provides the same information with a single table lookup, rather than by walking through the ifStackTable to find the various constituent ds0 ifTable entries, and testing various ifEntry leaf nodes like ifName etc.