... 2000(32FXS)can be with the mainstream SIP proxy servers(such as Asterisk, SIP registration server, etc. ) to implement docking ... . Run in a variety of environments and support SIP server ... DHCP,NTP,TFTP ,TELNET ,PPPOE, STUNDTMF MethodRFC 2833,SIP InfoSignalingSIP(RFC 3261)over UDPProvisioningTFTP,HTTPManagementWEB browser, Telnet, Voice ...