| Protocols/Standards |
SIP: SIP RFC3261, TCP/IP/UDP, RTP/RTCP, RTCP-XR, TLS, SRTP
Network: IPv4, IPv6, HTTP/HTTPS, ARP, ICMP, DNS(A record, SRV, NAPTR), DHCP, SSH,
TFTP, NTP, STUN, LLDP, TR-069, 802.1x |
| Network Interfaces |
One auto-negotiation 10/100 Mbps ethernet port integrated PoE Class 2 (GHP620/
GHP621) |
| Wi-Fi |
GHP620W/GHP621W integrated dual-band 2.4GHz & 5GHz 802.11 a/b/g/n/ac |
| Feature Keys |
26 keys, including:
6 programmable keys;
12 Standard Phone Digits keys(0-9: speed dial keys configuration on web page, * , #);
5 Function keys (Flash, Redial, Hands-free, Voice Mail, Hold);
3 Volume Control keys, Up/Down/Mute(with red color LED) |
| HD Audio |
One HD handset support for wide band audio |
| Voice Conferencing |
2 SIP accounts and lines, up to 3-way conference |
| Voice Codecs and Capabilities |
Support for G.729A/B, G.711µ/a-law, G.726, G.722(wide-band), G.723, iLBC, full band
Opus, In-band and out-of-band DTMF(in audio, RFC2833, SIP INFO), VAD, AEC, CNG, PLC,
AGC, AJB |
| Telephony Features |
Dial, Answer, Redial, Flash ,Hands-free, Voice Mail(with the server), Transfer, Conference,
Hold /Unhold, Mute /Unmute, flexible dial plan, Speed dial server redundancy & fail-over
Call out |
| Advanced Features |
Support for multicast paging and E911 service.
Support GDS Door opening.
Support for advanced jitter-resilience algorithm. |
| USB |
USB Type-C port for charging external devices (500mA MAX) |
