接口
网络接口
两个10/100M自适应交换式以太网口，GXP1615内置POE
其它接口
RJ9耳机接口（内置匹配缤特力耳机的EHS）
语音编码
G.711/a, G.722 (wide-band),G.723, G.726-32, G.729 A/B, iLBC,in-band and out-of-band DTMF (In audio, RFC2833, SIP INFO)
协议
SIP RFC3261, TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS (A record, SRV, NAPTR), DHCP,