Grandstream HT812 Analog Telephone Adapter

Grandstream HT812 Analog Telephone Adapter

The Grandstream HT812 is an advanced 2‑port analog telephone adapter with an integrated Gigabit NAT router, designed to connect standard analog phones or fax machines to a VoIP network. It supports dual SIP profiles and robust encryption, making it perfect for residential, office, or light business applications where reliable analog-to-IP integration is needed

Grandstream HT812 Analog Telephone Adapter Specifications

• FXS Ports: 2 RJ-11 ports for connecting analog telephones or fax machines

• Ethernet Ports: 2 Gigabit RJ-45 ports (WAN + LAN pass-through)

• Router Functionality: Integrated Gigabit NAT router with advanced routing capabilities

• Voice Codecs: Supports G.711a/u, G.723.1, G.729a/b, G.726, iLBC, OPUS, G.722

• Fax Support: T.38 Fax-over-IP and G.711 fallbackhttps://www.city.co.ke

• Security: TLS, SRTP, HTTPS, AES encryption, secure boot with unique device certificates

• Provisioning: TR-069, XML configuration, HTTP/HTTPS/TFTP auto-provisioning

• Telephony Features: Call transfer, forward, waiting, hold, DND, message waiting, 3-way conferencing

• SIP Profiles: Supports 2 SIP accounts (one per FXS port)

• Failover Support: Automatic failover to secondary SIP serverhttps://www.city.co.ke

• LED Indicators: Indicators for Power, LAN, WAN, Phone1, and Phone2

• Power Supply: 12V DC, 0.5A external adapter

• Operating Temperature: 0°C to 40°C

• Storage Temperature: -10°C to 60°C

• Humidity Range: 10% to 90% (non-condensing)

• Dimensions: 28.5 × 130 × 90 mm

• Weight: 353 grams

• Certifications: FCC, CE, RCM