This attribute specifies the identity of the component to
which the NailedUpAdaptationPoint is linked. This will be
an AtmIf Vcc NailedUpEndPoint or an AtmIf Vpt Vcc
NailedUpEndPoint (the AAL1 cells are transported off the
switch via an ATM UNI, where they are routed to the
appropriate AAL1 entity at the other end by the ATM
bearer service).