Snom 870. Display: TFT, Display resolution: 480 x 272 pixels, Display diagonal: 109.2 mm (4.3 "). Phonebook capacity: 2000 entries. Voice codecs: G.711, G.722, G.723.1, G.726, G.729AB. Supported network protocols: HTTP, HTTPS, UDP, TCP, PnP, TFTP, NTP. Security algorithms supported: 802.1x RADIUS, HTTPS, SSL/TLS