... priorities, multicast(IGMP Snooping V1/V2), etc.Support ToS(Type Of Service) and QoS.Call protocol: SIP(IMS compatible), compliant ... waiting, hot-line call, alarm clock, and all kinds of value-added voice service. Multi-party conferencing. IP address assignment ... 1*1 modeUSB1*USB2.0, host/device mode optionalIndicator8, show status of power, WAN, LAN, POTS, and WLANButton3, reset/default configuration ...