Unique QoS technical: Package losing compensation, Dynamic Buffer, Chaos sequence recomposition, voice package high priority, Echo cancellation, Voice Activation Detection, silence restrain and comfort noise generation. Agility Access:Support IP special telephone line, ADSL,LAN,Cable Modem,WiFi(Only HIP1860(4)) width band access way. HIP1860(3) double Ethernet model support NAT function,realize user 's internet. connection HIP1860(4) support 3G ISIM card and AKA certification function,can access the 3G network Telephone function: Hand free talking, Volume adjusting, Ringing tone selection, Call ID, Phone book, Missing incoming call, Incoming call, Outing call.failed outing call HIP1860(3) support telephone tone auto answer, alarm Clock and so on function. Support call waiting, call transferring, short dialing, avoid interrupt, Call conversation increment service. Default parameter renew. DTMF in band,out band transmission technology. The Managment of customer purview.