Grandstream HT818

Built for users looking for a strong analog-to-VoIP converter, the HT818 is a powerful 8-port VoIP gateway
with 8 FXS ports and an integrated Gigabit NAT router. It features Grandstream’s market-leading SIP
ATA/gateway technology with millions of units successfully deployed worldwide. This powerful gateway
carries exceptional voice quality in various application environments, strong encryption with unique
security certificate per unit, automated provisioning for volume deployment and device management, and
outstanding network performance for enterprise use.

Interfaces
Telephone Interfaces Eight (8) RJ11 FXS ports; can be expanded by peering with an FXS gateway
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.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 2 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
Signaling
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
Security
Media SRTP
Control
TLS/SIPS/HTTPS, SDP(RFC 2327), Refer (RFC 3515), Offer/Answer (RFC3265)
SIP V2.0 (RFC 3261, 3262, 3264), RFC3261
ETC (3GPP TS 24.629, RFC 3515, RFC 3891, RFC 3892)
SIP Session Timer (RFC 4028)
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 – 123ºF or 0º – 50ºC
Storage: 14º – 140ºF or -10º – 60ºC
Humidity: 10 – 90% Non-condensing
Dimension and Weight (L)180mm*(W)120mm*(H)36mm
356g
Compliance FCC/CE/RCM

Grandstream HT818