This attribute specifies the number of contiguous VPIs supported in
the optional Programmable VCC Space.
If numNonZeroVpisForVccs is 0 the Programmable VCC Space
does not exist. If numNonZeroVpisForVccs is greater than 0 the
Programmable VCC Space exists and covers the VPI values ranging
from firstNonZeroVpiForVccs to (firstNonZeroVpiForVccs +
numNonZeroVpisForVccs - 1).
The values of all attributes provisioned in this group must adhere to
the guidelines laid down in the description of the Provisioned
group.