• Supports 2 SIP profiles and 2 FXS ports
• Strong AES encryption with security certificate per unit
• Automated & secure provisioning options using TR069
• 3-way voice conferencing per port
• Exceptional voice quality with wide-band HD codec
• Supports T.38 Fax for reliable Fax-over-IP
• Supports dual Gigabit network ports
• High performance NAT router

Datasheet:

Telephone Interfaces Two (2) FXS ports Network Interfaces Two (2) 10/100/1000Mbps RJ45 ports LED Indicators POWER, LAN, WAN, PHONE1, PHONE2 Factory Reset Button Yes Telephony Features Caller ID display or block, call waiting, flash, blind or attended transfer, forward, hold, do not disturb, 3-way conference Voice Codecs G.711 with Annex I (PLC) and Annex II (VAD/CNG), G.723.1, G.729A/B, G.726, iLBC, OPUS, dynamic jitter buffer, advanced line echo cancellation Fax Over IP T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for Fax Pass-through Short/Long Haul Ring Load 3 REN, up to 1km on 24AWG line Caller ID Bellcore Type 1 & 2, ETSI, BT, NTT, and DTMF-based CID Disconnect Methods Busy Tone, Polarity Reversal/Wink, Loop Current Network Protocols TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, TELNET, STUN, SIP (RFC3261), SIP over TCP/TLS, SRTP, TR-069 QoS Layer 2 (802.1Q VLAN, SIP/RTP 802.1p) and Layer 3 (ToS, Diffserv, MPLS) DTMF Method In-audio, RFC2833 and/or SIP INFO Provisioning and Control HTTP, HTTPS, TELNET, TFTP, TR-069 , secure and automated provisioning using AES encryption, syslog Media SRTP Control TLS/SIPS/HTTPS Management Syslog support, telnet, remote management using web broswer Universal Power Supply Input: 100-240VAC, 50-60Hz Output: 12V/0.5A Environmental Operational: 32º – 104ºF or 0º – 40ºC
Storage: 14º – 140ºF or -10º – 60ºC
Humidity: 10 – 90% Non-condensing Dimension and Weight 28.5 x 130 x 90 mm (H x W x D) Weight: 353.33g Compliance FCC/CE/RCM

The HT812 is an advanced 2-port analog telephone adapter (ATA) with 2 FXS ports and an integrated Gigabit NAT router. Built upon Grandstream’s market-leading SIP ATA/gateway technology with millions of units successfully deployed worldwide, this powerful ATA features exceptional voice quality in various application environments, strong encryption with unique security certificate per unit, automated provisioning for volume deployment and device management, and outstanding network performance for home and office use.