Here are the detailed specifications for the Grandstream HT812 2 FXS Analog Telephone Adapter (ATA):
Overview
The Grandstream HT812 is a powerful 2-port ATA designed to connect analog telephones and fax machines to a VoIP network. It features two FXS ports and an integrated Gigabit NAT router, making it suitable for both home and office environments.
Key Specifications
Hardware Interfaces
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FXS Ports: 2 RJ11 ports for analog telephone connections
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Network Ports: 2 Gigabit Ethernet ports (1 WAN, 1 LAN)
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LED Indicators: Power, LAN, WAN, Phone1, Phone2
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Factory Reset Button: Yes
Voice & Telephony Features
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SIP Accounts: Supports 2 SIP profiles
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Voice Codecs: G.711 (A-law and μ-law), G.722, G.723.1, G.726-32, G.729A/B, iLBC, OPUS
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Fax Support: T.38 Fax-over-IP and G.711 pass-through
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Telephony Functions: Caller ID display/block, call waiting, call transfer (blind/attended), call forwarding, call hold, do not disturb (DND), 3-way conferencing
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Echo Cancellation: Advanced line echo cancellation
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Jitter Buffer: Dynamic jitter buffer
Network & Security
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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
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QoS: Layer 2 (802.1Q VLAN, SIP/RTP 802.1p), Layer 3 (ToS, DiffServ, MPLS)
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Security: TLS and SRTP encryption for secure voice communication
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Provisioning: Supports TR-069 and XML configuration files for automated provisioning
Power & Environmental
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Power Supply: Input: 100-240V AC, 50-60Hz; Output: 12V DC, 0.5A
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Dimensions: Approximately 28.5 x 130 x 90 mm (H x W x D)
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Weight: Approximately 353g
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Operating Temperature: 0°C to 50°C
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Humidity: 10% to 90% (non-condensing)
Compliance
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FCC, CE, UL certifications
Key Features
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Supports 2 SIP profiles through 2 FXS ports
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Integrated Gigabit NAT router with routing speeds up to 100Mbps
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TLS and SRTP security encryption technology to protect calls and accounts
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Automated provisioning options include TR-069 and XML config files
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Supports 3-way voice conferencing
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Failover SIP server automatically switches to secondary server if main server loses connection
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Supports T.38 Fax for creating Fax-over-IP
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Supports a wide range of caller ID formats
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Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning
