Network interface | 3 x RJ45 1G Self adaptive
| Display technology | 320×240 color LCD with touch screen for Shortcut Keys and Scroll Bar
| DTMF | In-band audio, RFC4733, SIP INFO
| Recovery button | Yes
| NAT router | Yes (supports router mode and switch mode)
| Network protocols | TCP/UDP/IP, RTP/RTCP, ICMP, ARP, DNS, DDNS, DHCP, NTP, TFTP, SSH, HTTP/HTTPS, PPPoE, STUN, SRTP, TLS, LDAP, HDLC, HDLC-ETH, PPP, Frame Relay (pending), IPv6, OpenVPN
| Operating system | Based on Asterisk version 16
| PoE | PoE+
| QoS | Layer 2 QoS (802.1Q, 802.1P), Layer 3 QoS (ToS, DiffServ, MPLS)
| SIP accounts | 3 Meeting Rooms, 50 Parties, Concurrent Calls (G.711): 50, Max concurrent SRTP calls (G.711): 50, Users: 250
| Telephony feature | Blacklist/whitelist, BLF, Busy camp-on/ call completion, Call back, Call follow me, Call forward, call history, Call park, Call queue, Call record, Call routes, Call transfer, Call waiting, Call wakeup, Caller identification, Dial by name, DISA, DND, DOD, Emergency call, Eventlist, Fax to email, Feature codes, IVR, music on hold, Paging/intercom, Pickup group, PIN groups, Ring group, Ring simultaneously, Ringtone, SCA, Speed dialing, Time schedule, Voice control, Voice meeting, Voicemail, Voicemail to email
| Update/Provision | Auto-discovery & auto-provisioning of Grandstream IP endpoints via ZeroConfig (DHCP Option 66 multicast SIP SUBSCRIBE mDNS), Eventlist between local and remote trunk, mass provisioning using AES encrypted XML configuration file, Supported by Grandstream Device Management System (GDMS), Zero-touch cloud provisioning and management system, It provides a centralized interface to provision, manage, monitor and troubleshoot Grandstream products
| Voice codecs | Opus, G.711 A-law/U-law, G.722, G722.1 G722.1C, G.723.1 5.3K/6.3K, G.726-32, G.729A/B, iLBC, GSM; T.38
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Auxiliary ports | 1 x USB 2.0
| Disconnection methods | Busy/Congestion/Howl Tone, Hook Flash Timing, Loop Current, Polarity Reversal
| Input voltage | 100 – 240V 50/60Hz
| Media encryption | SRTP, TLS, HTTPS, SSH, 802.1X
| Mounting | Desktop, Wall mountable
| Languages | Customizable IVR/voice prompts: English, Chinese, British English, German, Spanish, Greek, French, Italian, Dutch, Polish, Portuguese, Russian, Swedish, Turkish, Hebrew, Arabic, Nederlands, Web UI: English, Simplified Chinese, Traditional Chinese, Spanish, French, Portuguese, German, Russian, Italian, Polish, Czech, Turkish
| Operating humidity range | 10% to 90% , Non-condensing
| Storage temperature range | -10°C to +60°C
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