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header-product VoIP telephone adapter Grandstream HT841 voice codecs G.711 G.723.1 G.726 G.729A G.729B

VoIP telephone adapter Grandstream HT841 voice codecs G.711 G.723.1 G.726 G.729A G.729B

VoIP telephone adapter Grandstream HT841 Photo 1
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Short description

The Grandstream HT841 VoIP telephone adapter supports multiple voice codecs including G.711, G.723.1, G.726, G.729A, and G.729B. It features fax compatibility with T.38 and has LED indicators for LAN, Power, and WAN. Security is ensured with AES, HTTPS, SIPS, and SSL/TLS. Compact dimensions of 100 mm width, 28 mm depth, and 190 mm height make it suitable for various setups.
Warranty: 2 Years
SKU: 10810635
Manufacturer: Grandstream
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Product information

Description

The Grandstream HT841 VoIP telephone adapter provides a compact, easy-to-deploy gateway between traditional PSTN lines and IP-based phone systems. It supports multiple voice codecs (G.711, G.723.1, G.726, G.729A, G.729B), fax over T.38, and includes LED status indicators for LAN, WAN and power. Security features include AES encryption, HTTPS, SIPS and SSL/TLS. The device is designed to connect analog phones or PBX trunks to hosted or on-premise IP PBX networks, enabling seamless integration of existing telephony into VoIP environments.

Advantages

The HT841 combines FXO/FXS gateway functionality with broad codec support to ensure interoperability and good voice quality across networks. Automated provisioning options simplify deployment across multiple locations, while built-in security protocols protect signaling and media. Compact dimensions make it suitable for desk- or rack-adjacent installation without occupying much space.

Suitable for

  • Connecting analog phones or fax machines to an IP PBX
  • Integrating PSTN lines with hosted or on-premise VoIP systems
  • Small and medium business branch offices needing SIP trunks or analog extension support
  • Deployments that require T.38 fax relay and multiple codec compatibility

Key specifications

  • Model: Grandstream HT841 (MPN: HT841, EAN: 6947273704775)
  • Voice codecs: G.711, G.723.1, G.726, G.729A, G.729B
  • Fax: T.38 support
  • Ports: FXO/FXS gateway functionality (as per HT8x1 series)
  • Security: AES, HTTPS, SIPS, SSL/TLS
  • Indicators: LAN, WAN, Power LEDs
  • Dimensions: 100 mm (W) × 28 mm (D) × 190 mm (H)

How to use

Connect the HT841 to your network via the WAN/LAN Ethernet ports and attach the analog phone or PSTN trunk to the appropriate FXS/FXO port. Use the web-based configuration interface or supported provisioning server to enter SIP account details and choose preferred codecs. Enable T.38 for fax devices if required. Verify LED indicators to confirm network and power status, then perform test calls to confirm audio paths and codec negotiation.

Usage recommendations

For best voice quality, prioritize lower-latency codecs supported by your network and ensure QoS is configured on routers and switches. Use secure transport (SIPS/HTTPS) for provisioning and signaling when connecting to remote or hosted IP PBX providers. Enable T.38 for reliable fax transmissions and keep firmware updated to maintain interoperability and security.

All features
Dimensions (WxDxH):
120 x 180 x 36
Weight:
0.46 kg
Security algorithms:
SSL/TLS, SIPS, HTTPS, AES
Operating relative humidity (H-H):
10 - 90
Storage temperature (T-T):
-10 - 60
Operating temperature (T-T):
0 - 40
Height:
190 mm
LED indicators:
WAN, Power, LAN
Width:
100 mm
Depth:
28 mm
Conference call:
Yes
Voice codecs:
G.729A, G.729B, G.726, G.723.1, G.711
Fax compatibility:
T.38
Modem (RJ-11) ports:
4
Ethernet LAN (RJ-45) ports:
2
Caller ID:
Yes
Call waiting:
Yes
Quality of Service (QoS) support:
Yes
Reset button:
Yes

Description

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Customer questions

FAQ

What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All Grandstream products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Grandstream service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

Where can I download the instructions for VoIP telephone adapter Grandstream HT841?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
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14-Day Return Policy We are confident in our quality, but if the purchase doesn’t fit — you have 14 days to return the product with peace of mind.
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