SKU : HT812(2 FXS IAD)
Categories : IP-PBX ,  GrandStream , 
Brand : Grandstream
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The HT812 is an advanced 2-port analog telephone adapter (ATA) featuring 2 FXS ports and an integrated Gigabit NAT router. Building on Grandstreams market-leading SIP ATA/gateway technology with millions of units deployed worldwide, this powerful ATA delivers exceptional voice quality in various application environments. It offers strong encryption with a unique security certificate per unit, automated provisioning for high-volume deployment and device management, and outstanding network performance for both home and office use.
| Grandstream HT812 Analog Telephone Adapter (ATA) | |
| Telephony Interfaces | Two (2) RJ11 FXS ports; can be expanded by peering with an FXS gateway |
| 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.722, G.723.1, G.729A/B, G.726-32, 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 |
| Dial Methods | DTMF, Pulse |
| Disconnect Methods | Busy Tone, Polarity Reversal/Wink, Loop Current |
| Network Protocols | TCP/IP/UDP, RTP/RTCP (RFC1889, 1890), HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP, TFTP, SSH, Telnet, STUN (RFC3489, 5389), SIP (RFC3261), SIP over TCP/TLS, SRTP, SNMP, TR-069, IMS/3GPP, IPoE |
| QoS | Layer 2 (802.1Q VLAN, SIP/RTP 802.1p) and Layer 3 (ToS, Diffserv, MPLS), Traffic shaping |
| DTMF Method | In-audio, RFC2833 and/or SIP INFO |
| Provisioning and Control | HTTP, HTTPS, SSH, TFTP, TR-069, secure and automated provisioning using AES encryption, syslog |
(Free shipping for orders of 10,000 baht or more | Product prices include 7% VAT | Special discounts available for project work)