1. Rhagymadrodd
This manual provides detailed instructions for the installation, configuration, and operation of the Grandstream HT841 4 FXO 1 FXS 2 GIGE POE NAT Router. The HT841 is designed to provide advanced routing capabilities with integrated telephony features, including 4 FXO ports for connecting to analog telephone lines, 1 FXS port for connecting an analog phone or fax machine, and 2 Gigabit Ethernet ports with Power over Ethernet (PoE) support. It also features NAT routing for network address translation.
Please read this manual thoroughly before using the device to ensure proper setup and optimal performance.
2. Gwybodaeth Diogelwch
- Defnyddiwch yr addasydd pŵer a gyflenwir gyda'r ddyfais yn unig.
- Peidiwch â gwneud y ddyfais yn agored i ddŵr neu leithder.
- Peidiwch â gosod y ddyfais ger ffynonellau gwres neu mewn golau haul uniongyrchol.
- Sicrhewch awyru priodol o amgylch y ddyfais.
- Peidiwch â cheisio agor na newid y ddyfais. Cyfeiriwch yr holl waith cynnal a chadw at bersonél cymwys.
- Cadwch y ddyfais i ffwrdd oddi wrth blant.
3. Cynnwys Pecyn
Gwiriwch fod eich pecyn yn cynnwys yr eitemau canlynol:
- Grandstream HT841 Router Unit
- Adaptydd Pŵer Cyffredinol
- Cebl Ethernet
- Canllaw Gosod Cyflym

Image 1: Grandstream HT841 Router with its power adapter and Ethernet cable. The router is a compact black device with multiple ports on the back.
4. Disgrifiad Corfforol
4.1 Panel Blaen
The front panel features LED indicators for power, network activity, and FXO/FXS port status. These LEDs provide a quick visual status of the device's operation.
4.2 Panel Cefn
The rear panel contains all connectivity ports:
- Mewnbwn pŵer: DC 12V power jack.
- Porthladd WAN: Gigabit Ethernet port for connecting to the internet/modem.
- Porth LAN: Gigabit Ethernet port with PoE support for connecting to local network devices.
- FXO Ports (4): RJ11 ports for connecting to analog PSTN lines.
- FXS Port (1): RJ11 port for connecting an analog telephone or fax machine.
- Botwm Ailosod: Recessed button for factory reset (use a paperclip).
5. Gosod
5.1 Cysylltu'r Dyfais
- Cysylltwch un pen y cebl Ethernet â'r WAN port of the HT841 and the other end to your modem or internet source.
- Cysylltwch gebl Ethernet arall o'r LAN port of the HT841 to your computer or a network switch.
- Connect your analog telephone lines to the Fxo ports (RJ11).
- Connect an analog phone or fax machine to the FXS port (RJ11).
- Cysylltwch yr addasydd pŵer â'r Mewnbwn Pwer jack and then plug it into a power outlet.
- Wait for the device to boot up. The LED indicators on the front panel will illuminate.
5.2 Ffurfweddiad Cychwynnol
I gael mynediad i'r web rhyngwyneb cyfluniad:
- Ensure your computer is connected to the HT841's LAN port.
- Agor a web porwr a nodwch y cyfeiriad IP diofyn (fel arfer http://192.168.2.1 or http://192.168.0.1). Refer to the Quick Installation Guide for the exact default IP.
- Enter the default username (admin) and password (admin).
- Follow the on-screen prompts to configure basic network settings, SIP accounts, and FXO/FXS port parameters.
6. Gweithredu'r Dyfais
6.1 Swyddogaethau Galwadau Sylfaenol
Once configured, the HT841 facilitates calls through connected analog phones and PSTN lines.
- Gwneud Galwadau: Pick up the connected analog phone, wait for a dial tone, and dial the desired number.
- Derbyn Galwadau: The connected analog phone will ring for incoming calls. Pick up the handset to answer.
6.2 Network Routing
The HT841 functions as a NAT router, providing internet access to devices connected to its LAN port. It supports standard routing protocols and firewall features configurable via the web rhyngwyneb.
6.3 Ymarferoldeb PoE
The LAN port supports Power over Ethernet (PoE), allowing it to power compatible devices such as IP phones or access points directly through the Ethernet cable, reducing cable clutter.
7. cynnal
- Diweddariadau Cadarnwedd: Gwiriwch y Grandstream yn rheolaidd website for firmware updates to ensure optimal performance and security. Updates can be applied via the web rhyngwyneb cyfluniad.
- Glanhau: Defnyddiwch frethyn meddal, sych i lanhau'r ddyfais. Peidiwch â defnyddio glanhawyr hylif na aerosolau.
- Ffurfweddiad Wrth Gefn: Periodically back up your device configuration settings through the web interface to facilitate quick restoration if needed.
- Ailgychwyn: If the device experiences issues, try restarting it by unplugging the power adapter, waiting 10 seconds, and then plugging it back in.
8. Datrys Problemau
| Problem | Achos Posibl | Ateb |
|---|---|---|
| Dim Pwer | Addasydd pŵer heb ei gysylltu neu'n ddiffygiol. | Ensure power adapter is securely connected to the device and a working power outlet. Test with another outlet if possible. |
| No Dial Tone on FXS Port | Phone not connected, SIP account not registered, or incorrect configuration. | Check phone connection. Verify SIP account registration status in the web rhyngwyneb. Parview FXS port configuration. |
| Cannot Make/Receive Calls via FXO | PSTN line not connected, FXO port not configured, or line impedance mismatch. | Ensure PSTN lines are connected to FXO ports. Configure FXO ports in the web interface. Adjust line impedance settings if necessary. |
| Dim Mynediad i'r Rhyngrwyd | WAN connection issue, incorrect network settings, or modem problem. | Check WAN cable connection. Verify WAN settings (DHCP, Static IP) in the web interface. Restart modem and router. |
| Web Interface Inaccessible | Incorrect IP address, network connectivity issue, or device malfunction. | Ensure computer is on the same subnet as the router. Try default IP address. Check LAN cable. Perform a factory reset if all else fails (note: this will erase all configurations). |
9. manylebau
| Nodwedd | Manylyn |
|---|---|
| Model | HT841 |
| Porthladdoedd FXO | 4 (RJ11) |
| Porthladdoedd FXS | 1 (RJ11) |
| Porthladdoedd Ethernet | 2 x Gigabit Ethernet (1 WAN, 1 LAN with PoE) |
| Llwybrydd NAT | Oes |
| Cefnogaeth PoE | Yes (on LAN port) |
| Dimensiynau | 7.48 x 4.33 x 1.18 modfedd (190 x 110 x 30 mm) |
| Pwysau | 1.32 pwys (0.6 kg) |
| System Weithredu | Grandstream OS |
| Mewnbwn Pwer | 12V DC, 1.5A (included power adapter) |
| Dyfeisiau Cydnaws | Gliniadur, Cyfrifiadur Personol, Ffôn Clyfar, Tabled |
| Defnyddiau a Argymhellir | Small Office, Home Office (SOHO) |
10. Gwarant a Chefnogaeth
For warranty information, please refer to the warranty card included in your product packaging or visit the official Grandstream website. Technical support can be accessed through the Grandstream support portal, which offers FAQs, documentation, and contact options for assistance.
- Swyddog Grandstream Websafle: www.grandstream.com
- Porth Cymorth: Cyfeiriwch at y swyddog website for the latest support resources.





