Yealink SIP-T21 (NON-PoE), VoIP Phone w/ 2 Lines, HD Voice, Power Supply Included HD Voice: HD Codec, HD speaker, HD handset 132 x 64-pixel graphical LCDHD Voice: HD Codec XML/LDAP remote phonebook Two-port 10/100 Ethernet Switch HD handsetXML/LDAP Phonebook