Name: Grandstream HT841 4-Port FXO VoIP Gateway
Brand: Grandstream Networks
SKU: GSR-HT841
Availability: InStock

Grandstream HT841 4-Port FXO VoIP Gateway

R2,589.00 inc. VAT

The Grandstream HT841 is a 4-port analogue FXO gateway that bridges existing PSTN telephone lines with VoIP and IP PBX systems. Featuring 4× RJ11 FXO ports, 1× RJ11 FXS port, and dual Gigabit Ethernet ports with 802.3af PoE support, it’s the compact, cost-effective choice for smaller businesses or branch offices needing to integrate up to four PSTN lines into a modern VoIP environment — with no power supply required when powered via PoE.

In stock

SKU: GSR-HT841 Categories: Networking, VoIP, VoIP Routers & Gateways Tags: analog-gateway, asterisk-compatible, business-voip, fax-over-ip, freepbx-compatible, fxo-gateway, gdms, grandstream, ht841, ip-pbx-integration, lifeline-support, nat-router, networking, poe-gateway, pstn-failover, pstn-to-voip, sip-gateway, srtp-encryption, t38-fax, voip-gateway Brand: Grandstream Networks

Description

Connect Your PSTN Lines to Any IP PBX

The HT841/881 FXO gateway series enables businesses of all sizes to create an easy-to-deploy VoIP solution, seamlessly connecting multiple locations and all devices within an office to any hosted or on-premise IP PBX network. The HT841 is the 4-port model in the series — the ideal fit for smaller offices, retail environments, or branch locations with up to four active PSTN or analogue lines that need to remain operational alongside a modern VoIP or IP PBX platform.

Key Highlights

4× RJ11 FXO ports and 1× RJ11 FXS port
Supports 3 SIP profiles across the FXS and FXO ports
2× 10/100/1000 Mbps RJ45 ports — one with 802.3af PoE-PD support
Powered via PoE, optional PoE injector, or optional 12V power supply (sold separately)
Designed and tested for full interoperability with leading IP PBXs, soft-switches, and SIP-based environments

NAT Router & Lifeline Support

The HT841 includes a high-performance NAT router for basic routing and network edge protection in smaller deployments. Lifeline support hard-relays the FXS port to an FXO port in the event of a power outage, ensuring a connected analogue phone can still make and receive PSTN calls even when power or internet connectivity is disrupted. This is a particularly practical feature for South African deployments where load shedding and connectivity interruptions are real-world concerns.

Built-in high-performance NAT router for network edge protection
PSTN lifeline — FXS port hard-relays to FXO port during power outage for emergency call continuity
Failover SIP server automatically switches to a secondary server if the primary loses connection
Up to 1000 Mbps in bridge mode; up to 100 Mbps in NAT mode

Fax, Codec & Telephony Feature Support

T.38 fax support enables reliable Fax-over-IP transmission, while broad codec compatibility ensures voice quality across varied VoIP infrastructure. 3-way voice conferencing is supported per port, and a full set of standard telephony features makes the HT841 a capable drop-in gateway for virtually any SIP-based environment.

T.38 Fax-over-IP with automatic G.711 pass-through fallback
G.711, G.723.1, G.729, G.726-32, iLBC, and Opus codec support
3-way voice conferencing per port
Caller ID, call waiting, call transfer, call forward, and do not disturb
Flexible dial plans for call routing control

Security & Easy Management

Strong AES encryption with a unique security certificate per unit protects all calls and account credentials. Automated and secure provisioning via TR-069 makes mass deployment straightforward, and the HT841 is fully compatible with GDMS — Grandstream’s free cloud management platform — for centralised configuration, firmware management, and monitoring alongside other Grandstream devices.