The HT812 is an advanced 2-port analog telephone (ATA) adapter with 2 FXS ports and an integrated Gigabit NAT router. Designed based on the leading AIP / SIP gateway technology in the Grandstream market with millions of units successfully installed worldwide, this powerful ATA offers exceptional voice quality in various application environments, encryption reinforced with a unique security certificate per unit, automatic provisioning for volume deployment and device handling and excellent network performance for home and office use.
Grandstream brand
Model HT812
Type - Gateway
Ports - 2 x FXS ports
- 2 x 10/100 / 1000Mbps RJ45 ports
Voice, fax, modem - 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: Group 3 Relay Fax compatible with T.38 up to 14.4kpbs and automatic switching to G.711 for Fax Pass-through
- Ring Load: 3 REN, up to 1 km on the 24AWG line
- Caller ID: Bellcore Type 1 and 2, ETSI, BT, NTT and CID based on DTMF
- Disconnection Methods: Busy Tone, Reverse Polarity / 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)
Signal - DTMF Method: In-audio, RFC2833 and / or SIP INFO
- Provisioning and Control: HTTP, HTTPS, TELNET, TFTP, TR-069, secure and automatic provisioning using AES encryption, syslog
- Media: SRTP
- Control: TLS / SIPS / HTTPS
Other features - LED indicators: POWER, INTERNET, PHONE1, PHONE2
- Factory Reset Button: Yes
- Telephony Functions: Display or blocking caller ID, call waiting, flash, unsupervised or supervised transfer, call forwarding, hold, do not disturb, 3-way conference
- Management: Support syslog, telnet, remote management using internet browser
- Power Supply: Input: 100-240VAC, 50-60Hz | Output: 12VDC / 0.5A
- Environment: In operation: 32º - 104ºF or 0º - 40ºC
- In storage: 14º - 140ºF or -10º - 60ºC
- Humidity: 10 - 90%, without condensation
- Dimension and Weight: 28.5 x 130 x 90 mm, 114 g (H x W x D) Weight: 353.33g
- Compliance: FCC / CE / RCM
Revision date 03-28-2017 by MSB
