Protocols: LLDP-MED for VLAN discovery; IPv4; TCP (RFC 793) in SSL/TLS; Domain Name System (DNS): A records (RFC 1706), SRV records (RFC 2782), RTP (RFC 1889, 1890), RFC 5966
Security: HTTPS secure provisioning; Local Access Interface: IVR password
Additional Features: 10-number speed dial memory
Lighted keypad
Receiver volume control
Flash and redial
Hearing aid compatible
Desk/wall mountable
Includes 7' line cord