MTA 5531 IP Videophone Specifications Video Telephony Over Broadband Networks Features | Specifications Call Agent/Softswitch • SIP 2.0 • H.323 V2* • MGCP* • MD5 Authentication • Domain Support • Outbound Proxy Protocol Support • TCP/IP, UDP, DHCP, RTP, ARP, ICMP, HTTP 1.0, TFTP, STUN, SNTP Codec Support • G.711 (a-law, u-law) , G.723.1, G.729, G.728* • H.261, H.263, H.263+* Camera • High Quality ¼" CCD sensor Video Bandwidth • 64 kbps to 768 kbps Video Resolution • CIF resolution (352 x 288 pixels) • QCIF resolution (176 x144 pixels) • Maximum 30 frames per second Voice Quality • G.168 Line Echo Cancellation • Voice Activity Detection • Comfort Noise Generation Quality of Service • VLAN • ToS Tagging • Priority Switch Network Interface • Wireless LAN (802.11b) PCMCIA slot • Dual 10/100 Base-T Uplink/Downlink Ports • PSTN Port - FXO Interface Display • 5" TFT Color LCD • Adjustable LCD panel Video and Audio Input/Output • Auxiliary Video In/Out: (NTSC / PAL, RCA-phono) • Auxiliary Voice In/Out: (RCA-phono) Call Features* • Call Hold • Call Transfer • Call Waiting • Call Screening • Call Forward • Caller ID Display/Blocking Physical • Dimensions: 9.06"W x 8.58"D x 3.69"H (230mm W x 218mm D x 93.7mm H) • Weight: 3.31 lbs (1.5kg) Phone Features • NAT Router • Firewall/Border traversal solution support • Voice and Video* Answering Machine functions • Messaging (SMS, MMS, Video clips)* • Icon-based GUI • Auto Answer with Password • Screensaver • Games • Tone selection • Privacy Mode • Full Screen Remote/Self and PIP View • Video Input/Output • Volume Control • Handsfree and Speaker Phone • Last Number Redial via Call History • Mute • PhoneBook • Call History (Incoming and Outgoing Calls) • Multi purpose LED (Network, Call Ringer, etc) • Message LED • Information Delivery System (IDS)* • Firmware Upgradeable Color Availability • Silver/Metallic Purple Warranty • One year * Check for availability