Grandstream HT841 Analog FXO Gateway
The Grandstream HT841 is a 4‑port analog FXO VoIP gateway with 1 FXS port, dual Gigabit Ethernet with NAT router, support for 3 SIP profiles, T.38 Fax‑over‑IP, lifeline and failover support, advanced telephony features, and secure automated provisioning — ideal for bridging traditional PSTN lines with modern SIP‑based VoIP systems.
Description
Grandstream HT841 — 4‑Port Analog FXO VoIP Gateway with FXS & NAT Routing
Key Features:
-
4 × FXO Ports + 1 × FXS Port: Connect four analog PSTN lines and an analog phone/fax device.
-
Dual Gigabit Ethernet with NAT Router: Two 10/100/1000 Mbps ports with NAT routing simplifies network setup.
-
3 SIP Profiles: Register with up to three separate SIP servers for redundancy or multi‑provider configurations.
-
T.38 Fax‑over‑IP: Reliable Group 3 fax relay over IP with automatic fallback to G.711.
-
Lifeline Support: FXS port can be hard‑relayed to an FXO port for direct PSTN use during power/network outages.
-
Failover SIP Server: Automatically switches to a backup SIP server if primary fails.
-
Advanced Telephony: Caller ID (display/block), call waiting, flash, transfer, forward, hold, do not disturb, 3‑way voice conferencing per port.
-
Secure & Automated Provisioning: Supports TR‑069, secure XML provisioning, TLS/SRTP/HTTPS encryption, and unique AES certificate per unit.
-
Voice Quality: Wide codec support including G.711, G.723.1, G.729, G.726, iLBC, OPUS, with advanced jitter buffer and echo cancellation.
-
LED Indicators & Reset: POWER, NET1, NET2, FXS, FXO LEDs plus factory reset button.
Hardware & Technical Specs:
-
Telephony Interfaces:
• 4 × RJ11 FXO for PSTN/analog line connection
• 1 × RJ11 FXS for analog handset/fax. -
Network Interfaces: 2 × 10/100/1000 Mbps RJ45 (one with 802.3af PoE‑PD support).
-
Voice Codecs: G.711 (PLC/VAD/CNG), G.723.1, G.729, G.726, iLBC, OPUS with jitter buffer and echo cancellation.
-
Fax: T.38 Group 3 fax relay with G.711 fallback.
-
Telephony Features: Caller ID (Bellcore/ETSI/BT/NTT/DTMF), call waiting, flash, transfer, forward, hold, DND, 3‑way conferencing.
-
Signaling & Protocols: SIP (RFC3261) over UDP/TCP/TLS, RTP/RTCP, DHCP, DNS, NTP, STUN, SRTP, QoS (802.1Q/p, ToS, DiffServ).
-
Security: AES encryption, TLS/SRTP, HTTPS, secure provisioning (TR‑069, XML).
-
Power: PoE‑PD (802.3af) or 12 VDC/1 A adapter (sold separately/included depending on seller).
-
LEDs: POWER, NET1, NET2, FXS, FXO.
-
Physical: Approx. 190 × 100 × 28 mm; ~0.46 kg.
-
Environmental: Operating ~0–40 °C; humidity 10–90 % non‑condensing.
Technical Datasheet
You can download the full technical documentation for this product from the link below:
Download PDF Datasheet
