Contains an enumeration of the types of phone numbers.
<PhoneNumberType> <enumeration value="Fax"/> <enumeration value="Home"/> <enumeration value="Mobile"/> <enumeration value="Office"/> <enumeration value="Pager"/> <enumeration value="CallBack"/> <enumeration value="Office2"/> <enumeration value="Radio"/> <enumeration value="Car"/> <enumeration value="Other"/> <enumeration value="Telex"/> <enumeration value="ISDN"/> <enumeration value="Assistant"/> <enumeration value="Home2"/> <enumeration value="FaxOffice"/> <enumeration value="FaxHome"/> <enumeration value="TTYTDD"/> <enumeration value="Company"/>