... you need to call to B when you call to A, and need to talk with Party three, you can press 1 ... local number;10,Speed dial function;11,Display date, time, and with Alarm ring function; 12,Hold on music;13,PPPoE ... ;14,Dynamic and static IP address;15,Support voice code format: G. ... ,IP/ICMP,UDP/TCP/IP,RTP/RTCP);18,TFTP and Console function;19,IEEE 802.1P/802.1Q/ToS u ...