PhoneAttributes describes a VCard telephone number and can include the following values:
- tpaHome - home telephone number
- tpaVoiceMessaging - voice messaging is available
- tpaWork - work telephone number
- tpaPreferred - preferred telephone number
- tpaVoice - voice telephone number
- tpaFax - facsimile telephone number
- tpaCellular - cellular telephone number
- tpaVideo - video-phone number
- tpaBBS - Bulletin Board System
- tpaModem - Modem telephone number
- tpaCar - Car telephone
- tpaISDN - ISDN telephone number
- tpaPCS - personal communication services telephone number
- tpaPager - pager telephone number