This read-write Integer32 holds, per the object's own description, the interface name of the father interface on which the MP (multilink PPP) bundle is built, given as the name of a Virtual Template or an MP group. An admin uses it to tie a dial-backup or multilink row back to the parent interface that actually owns the bundled channels, which is useful when correlating dialer table entries to the interface list. As an illustrative case, a device with a bundle built over Virtual-Template1 would expose that association through this object for the corresponding hwDccEntry row.