Place of Origin
Shanghai, China
Call control
SIP/UDP and SIP/TCP (RFC3261), IMS (3GPP), MGCP (RFC3435)
Network
SSH, HTTP, HTTPS, DHCP/PPPoE client, Radius, DNS (A/SRV record), STUN
Codec
G.711 (a/μ), G.729a, G.722, G722.2
Caller ID
Bellcore/Telcordia, ETSI, BT, DTMF