This attribute is obsolete. Please refer to the Override component
for the new attribute.
This attribute specifies the number of conti guous 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 VCC Space as a whole must adhere to the guidelines laid down
in the description of the AtmConnMappingVccProv group.