This object identifies the scope of ccmPhoneInetAddressIPv4.
unknown(0): It is not known if ccmPhoneInetAddressIPv4 is
used for Administration purpose or Controlling purpose.
adminOnly(1): ccmPhoneInetAddressIPv4 is used for the
serviceability/administrative purpose.
controlOnly(2): ccmPhoneInetAddressIPv4 is used for
signaling/registration purpose.
adminAndControl(3): ccmPhoneInetAddressIPv4 is used for
controlling as well as administrative purpose.