Cisco 1-Line IP Telephone, 1-Port Ethernet, Display. Management protocols: HTTPS, HTTP, TFTP. Voice codecs: G.711, G.726, G.729A, G.723.1, Networking features: Ethernet/Fast Ethernet, Supported network protocols: IPv4, ARP, DNS, DHCP, ICMP, TCP, UDP, RTP, RTCP, TOS, SNTP, SIPv2. Display: LCD, Display resolution: 128 x 64 pixels. Security algorithms supported: 256-bit AES. Weight: 975 g, Dimensions (WxDxH): 195 x 180 x 160 mm