The Grandstream HT818 is a powerful 8-port VoIP gateway with 8 FXS ports and an integrated Gigabit NAT router. Built upon Grandstream’s market-leading SIP ATA/gateway technology, this powerful gateway features exceptional voice quality, strong encryption, automated provisioning and device management, and outstanding network performance for enterprise use.

Interfaces

• Telephone Interfaces: Eight (8) RJ11 FXS ports
• Network Interface: Two (2) 10/100/1000Mbps RJ45 ports
• LED Indicators: POWER, LAN, WAN, PHONE1, PHONE2, PHONE3, PHONE4, PHONE5, PHONE6, PHONE7, PHONE8
• Factory Reset Button: Yes

Voice, Fax, Modem

• 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: 2 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

Signaling

• Network Protocols: TCP/IP/UDP, RTP/RTCP, HTTP/HTTPS, ARP/RARP, ICMP, DNS, DHCP, NTP,TFTP, SSH, 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, SSH, TFTP, TR-069 , secure and automated provisioning using AESencryption, syslog

Security

• Media: SRTP
• Control: TLS/SIPS/HTTPS
• Management: Syslog support, SSH, remote management using web browser

Physical

• Universal Power Supply:
  -Input: 100-240VAC, 50-60Hz
  -Output: 12V/1.5A
• Environmental:
  -Operational: 32o – 104oF or 0º – 40ºC
  -Storage: 14o – 140oF or -10º – 60ºC
  -Humidity: 10 – 90% Non-condensing
• Dimension and Weight: (L)180mm(W)120mm*(H)36mm, 356g