— VoIP Protocol : SIP (Session Initiation Protocol)
— Audio Codec: PCMU, PCMA, GSM, G.722
— Video Codec: H.263p, VP8, H.264
— Support pass through video call
— Up to 256 extensions
— Up to 8 SIP trunk
— Call detail records
— Flexible extension manager
— Provide network firewall functionality
— Operating temperature: -25 ~ +75°C