modVcsE164IntlPrefixDigits
1.3.6.1.4.1.562.2.4.1.16.2.12.1.15
This attribute specifies the E.164 international prefix digits. If
applicable, it is specified as 1 to 3 BCD digits.
The 3 BCD digits are stored with the length of the international
prefix in the low order nibble, nibble [0] followed by the most
significant digit of the international prefix in the next low order
nibble, nibble [1], etc.
This attribute is not required if the corresponding attribute,
'e164IntlFormatOnly' is set to a value of Yes (=1).