This object is the ATM address (with its accompanying mask) that network or local management assigns to the LECS on a given interface to determine which configure requests it accepts, and setting it triggers the LECS to try registering that address with the switch via ILMI. An admin cares because leaving it unspecified at row creation makes the LECS auto-discover its own ATM address through ILMI instead, so this field is the difference between a manually pinned LECS address and one negotiated automatically with the switch. For example, an admin who wants the LECS reachable at a specific well-known ATM address for a set of LE clients would set this explicitly rather than letting ILMI assign one.