Type: Wired VoIP Protocols: SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP, ARP/RARP, ICMP, DNS (A record and SRV), DHCP, PPPoE, TFTP, NTP, STUN, SIMPLE Security: User and administrator level passwords, MD5 and MD5- sess based authentication, AES based secure configuration file, SRTP Ports: Dual switched 10/100 Mbps Ethernet 2.5mm and RJ9 headset jackPort Display: 128 x 32 pixel graphic LCD Power: Universal power adaptor (Input: 100-240VAC 50-60Hz, Output:+5VDC, 1.2A, UL Certified) included Dimensions: 168mmx200mmx89.5mm Weight: 0.62KG