Local or Centralized Electrical Power - through POE 802.3af switch, or local power supply

Screen : Backlit display – 3.8″ diagonal 1/4 VGA quality grayscale pixel-based with adjustable display angle
Lines : 1
Networking : Ethernet (10/100) line interface with secondary Ethernet interface
Voice Codecs : G.711, G.722, G.726, G.729ab
Quality Of Service : IEEE 802.1Q (VLAN)
Network Protocols : H.323, SIP
Features : Three line appearance buttons with LEDs, Two message waiting indicators, Four-way navigation cluster button, Four contextual softkey buttons, USB interface
Power Supply : Local or Centralized Electrical Power – through POE 802.3af switch, or local power supply
Dimensions : N/A
Weight : N/A