... PSTN quality voice service. IP-002PB IP phone supports SIP protocols, offers one Ethernet interface and is compatible with ... management and provisioning http, telnet, keypad adjustable user password and super password URL based FTP,HTTP , TFTP,HTTPS auto provision, ... TFTP:Trivial File Transfer Protocol call control/Voip Fealures SIP RFC3261 Tone generation and Local DTMF re-generation according ...