Jarti VP553 is a kind of voice-communication terminal which is based on wide band and independent of PC (personal computer). It support standard SIP、H.323 protocols and support multiple network access means (ADSL 、Cable Modem 、etc ). VP553 is easy to use. Users can use VP553 without any training, and need not to change their usage of dialing after the initialization. VP553 has NAT function, which allows connecting several PC抯 to use the Internet simultaneously. The basic Internet calls with this phone are service thru VoIP service provider. Specifications Item Specification Adapter (Input/output/frequency) 220VA/7-12VDC/60Hz CPU Infineon PSB21553 150MHz Port WAN 10/100Base T RJ-45 for LAN LAN 10/100Base T RJ-45 for PC Power Consumption 2.8W/1.9W LCD 2*16(or 4*20)char Operating Temperature 0～60℃ Relative Humidity 5～95%