This object identifies the scope of ccmPhoneInetAddressIPv6.
unknown(0): It is not known if ccmPhoneInetAddressIPv6 is used
for Administration purpose or Controlling purpose.
adminOnly(1): ccmPhoneInetAddressIPv6 is used for the
serviceability/administrative purpose.
controlOnly(2): ccmPhoneInetAddressIPv6 is used for
signaling/registration purpose.
adminAndControl(3):ccmPhoneInetAddressIPv6 is used for
controlling as well as administrative purpose.