VoIP Protocols
SIP V2 (RFC 3261)
Frequency
TDD-LTE/FDD-LTE/3G/2G
Wifi/Bluetooth
2.4G/IEEE802.11b/g/n
Network Protocols
LDAP/TR069/RTP/SDP/XML/DHCP/SRTP/802.1Q
Voice Codec
G.711A/U Law G.722/G.729/GSM/iLBC/DTMF/ISACWB/OPUS
Function
Hold/Call Forward/Auto-provisioning/Mute/Date/DSS Keys SIP/Sip Call