Here are the detailed specifications for the Grandstream HT818 Analog Telephone Adapter (ATA):
Overview
The Grandstream HT818 is a high-performance 8-port VoIP gateway designed to connect analog telephones and fax machines to a VoIP network. It features eight FXS ports and an integrated Gigabit NAT router, making it suitable for both residential and enterprise environments. The device offers exceptional voice quality, robust security features, and automated provisioning options.
Key Specifications
Hardware Interfaces
-
FXS Ports: 8 RJ11 ports for analog telephone connections
-
Network Ports: 2 Gigabit Ethernet ports (1 WAN, 1 LAN)
-
LED Indicators: POWER, LAN, WAN, PHONE1 through PHONE8
-
Factory Reset Button: Yes
Voice & Telephony Features
-
SIP Accounts: Supports 2 SIP profiles across 8 FXS ports
-
Voice Codecs: G.711 (A-law and μ-law), G.722, G.723.1, G.726-32, G.729A/B, iLBC, OPUS
-
Fax Support: T.38 Fax-over-IP and G.711 pass-through
-
Telephony Functions: Caller ID display/block, call waiting, call transfer (blind/attended), call forwarding, call hold, do not disturb (DND), 3-way conferencing per port
-
Echo Cancellation: Advanced line echo cancellation
-
Jitter Buffer: Dynamic jitter buffer
Network & Security
-
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), Layer 3 (ToS, DiffServ, MPLS)
-
Security: TLS and SRTP encryption for secure voice communication
-
Provisioning: Supports TR-069 and XML configuration files for automated provisioning
Power & Environmental
-
Power Supply: Input: 100-240V AC, 50-60Hz; Output: 12V DC, 1.5A
-
Dimensions: Approximately 180 x 120 x 36 mm
-
Weight: Approximately 1.45 pounds (0.66 kg)
-
Operating Temperature: 0°C to 40°C
-
Humidity: 10% to 90% (non-condensing)
Compliance
-
FCC, CE, C-TICK, ITU-K.21 certifications
Key Features
-
Supports 2 SIP profiles through 8 FXS ports
-
Integrated Gigabit NAT router with routing speeds up to 100Mbps
-
TLS and SRTP security encryption technology to protect calls and accounts
-
Automated provisioning options include TR-069 and XML config files
-
Supports 3-way voice conferencing per port
-
Failover SIP server automatically switches to secondary server if main server loses connection
-
Supports T.38 Fax for creating Fax-over-IP
-
Supports a wide range of caller ID formats
-
Use with Grandstream’s UCM series of IP PBXs for Zero Configuration provisioning
