This read-only enumerated INTEGER (none, active, waitForAdd) reports the current status of the DSL port serving as bundle member 1: none means no link is configured or it hasn't trained, active means it's trained and carrying user data, and waitForAdd means it's trained but waiting for the IMUX CPE to acknowledge being added to the bundle. An admin watches this to see whether a newly added bundle member has actually joined service yet. For example, a member stuck at waitForAdd long after being configured suggests the CPE isn't properly acknowledging the addition, and the bundle isn't getting the extra bandwidth that member was meant to add.