• Analog Telephone FXS Ports: 2 RJ11 Ports
• PSTN Line FXO Ports: 2 RJ11 Ports
• Network Interfaces: Three self-adaptive Gigabit ports (switched, routed or dual mode) with PoE+
• NAT Router: Yes (supports router mode and switch mode)
• Peripheral Ports: 1*USB 2.0, 1*USB 3.0, 1*SD card interface
• LED Indicators: None
• LCD Display: 320x240 color LCD with touch screen for Shortcut Keys and Scroll Bar
• Reset Switch: Yes, long press for factory reset and short press for reboot
• Voice-over-Packet Capabilities: LEC with NLP Packetized Voice Protocol Unit, 128ms-tail-length carrier grade Line Echo Cancellation, Dynamic Jitter Buffer, Modem detection & auto-switch to G.711, NetEQ, FEC 2.0, jitter resilience up to 50% audio packet loss
• Voice and Fax 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
• Video Codecs: H.264, H.263, H263+, H.265, VP8
• QoS: Layer 2 QoS (802.1Q, 802.1p) and Layer 3 (ToS, DiffServ, MPLS) QoS
• API: Full API available for third-party platform and application integration
• Telephony Operating System: Based on Asterisk version 16
• DTMF Methods: In-band audio, RFC2833, and SIP INFO
• Provisioning Protocol & Plug-and-Play: Mass provisioning using AES encrypted XML configuration file, auto-discovery & auto-provisioning of Grandstream IP endpoints via ZeroConfig (DHCP Option 66 multicast SIP SUBSCRIBE mDNS), eventlist between local and remote trunk
• Network Protocols: SIP, TCP/UDP/IP, RTP/RTCP, IAX, ICMP, ARP, DNS, DDNS, DHCP, NTP, TFTP, SSH, HTTP/HTTPS, PPPoE, STUN, SRTP, TLS, LDAP, HDLC, HDLC-ETH, PPP, Frame Relay (pending), IPv6, OpenVPN
• Disconnect Methods: Busy/Congestion/Howl Tone, Polarity Reversal, Hook Flash Timing, Loop Current Disconnect
• Media Encryption: SRTP, TLS, HTTPS, SSH, 802.1X
• Universal Power Supply: Input: 100 ~ 240VAC, 50/60Hz; Output: DC 12V, 1.5A
• Dimensions: 270mm(L) x 175mm(W) x 36mm(H)