Grandstream HT812 2-Port Analog Telephone Adapter with Gigabit NAT Router User Manual

1. Introduction

The Grandstream HT812 is a powerful 2-port Analog Telephone Adapter (ATA) designed for users seeking to convert traditional analog phones into Voice over IP (VoIP) devices. It features two FXS ports for connecting analog telephones and dual Gigabit Ethernet ports, including a built-in NAT router capable of handling routing speeds up to 100Mbps. This device supports 2 SIP profiles and incorporates advanced security encryption technologies like TLS and SRTP to protect calls and accounts, ensuring secure and reliable communication.

This manual provides detailed instructions for the proper installation, configuration, and operation of your HT812 device.

2. Package Contents

Please verify that your package contains the following items:

• Grandstream HT812 Analog Telephone Adapter
• Universal Power Adapter
• Ethernet Cable
• Quick Installation Guide (This document serves as the comprehensive user manual)

3. Physical Overview

Familiarize yourself with the ports and indicators on the HT812 device.

Figure 1: Front view of the Grandstream HT812, showing the power, phone line 1, phone line 2, internet, and LAN indicator lights.

Figure 2: Rear view of the Grandstream HT812, displaying the power input, reset button, two LAN ports (blue), and two FXS phone ports (green).

Figure 3: Angled view of the Grandstream HT812, showcasing its compact design and port layout from a side perspective.

4. Setup and Installation

4.1 Connecting the HT812

1. Connect the Ethernet Cable:
   • Connect the blue LAN port on the HT812 to your internet router or switch using an Ethernet cable.
   • If using the HT812 as a router, connect your modem to the blue WAN port and your local network devices to the blue LAN port.
2. Connect Analog Phones:
   • Connect your analog telephone(s) to the green FXS ports (labeled 1 and 2) on the HT812 using standard RJ11 phone cables.
3. Connect Power:
   • Connect the power adapter to the DC 12V power input on the HT812 and then plug it into a power outlet.
   • The power indicator light on the front panel should illuminate.

4.2 Accessing the Web Configuration Interface

To configure the HT812, you need to access its web interface:

1. Determine the IP Address:
   • Connect an analog phone to FXS port 1.
   • Dial *** (three asterisks) to access the IVR menu.
   • When prompted, dial 02 to hear the device's current IP address.
   • Alternatively, check your router's DHCP client list for a device named "Grandstream" or by its MAC address (found on the bottom of the HT812).
2. Log In:
   • Open a web browser on a computer connected to the same network as the HT812.
   • Enter the IP address obtained in step 1 into the browser's address bar (e.g., http://192.168.1.100).
   • The default username is admin and the default password is admin (or found on the physical device label).

4.3 Firmware Update

It is highly recommended to update the device firmware to the latest version for optimal performance and security.

1. Log into the web configuration interface.
2. Navigate to Maintenance > Upgrade and Provisioning.
3. Set "Upgrade Via" to HTTP.
4. Enter firmware.grandstream.com in the "Firmware Server Path" field.
5. Click Apply at the bottom of the page.
6. Reboot the device from the web interface (Maintenance > Reboot) or by power cycling. The device will download and install the latest firmware. This process may take several minutes.

4.4 SIP Account Configuration

To make and receive calls, you need to configure your SIP account details provided by your VoIP service provider.

1. Log into the web configuration interface.
2. Navigate to Profile 1 (or the relevant profile for your service).
3. Configure the following settings based on your VoIP provider's information:
   • Primary SIP Server: Enter your provider's SIP server address (e.g., sip.yourprovider.com).
   • SIP User ID: Your SIP username or phone number.
   • Authenticate ID: Your SIP authentication ID (often the same as SIP User ID).
   • Password: Your SIP account password.
   • Ensure "SIP Registration" is set to Yes.
4. Click Apply and then Reboot the device.
5. After reboot, check the phone line indicator lights on the front panel. A solid blue light indicates successful SIP registration.

5. Operating Instructions

5.1 Making and Receiving Calls

Once your SIP account is registered, you can use your analog phone connected to the HT812 just like a regular phone line.

• Making a Call: Pick up the handset, wait for a dial tone, and dial the desired phone number.
• Receiving a Call: When the phone rings, pick up the handset to answer.

5.2 NAT Router Functionality

The HT812 includes a built-in NAT router. When connected to your modem, it can provide network access to other devices connected to its LAN port. This functionality allows for efficient network management and can handle routing speeds up to 100Mbps.

5.3 Security Features

The HT812 supports advanced security protocols to protect your communications:

• TLS (Transport Layer Security): Encrypts SIP signaling to prevent eavesdropping and tampering.
• SRTP (Secure Real-time Transport Protocol): Encrypts the voice data itself, ensuring privacy during calls.

These features can be configured within the web interface under the relevant SIP profile settings.

6. Maintenance

6.1 Firmware Updates

Regularly checking for and applying firmware updates is crucial for maintaining the security, stability, and performance of your HT812. Refer to section 4.3 for detailed instructions on how to update the firmware.

6.2 Device Care

• Keep the device in a cool, dry place, away from direct sunlight and excessive heat.
• Avoid exposing the device to water or moisture.
• Clean the device with a soft, dry cloth. Do not use liquid or aerosol cleaners.

7. Troubleshooting

This section addresses common issues you might encounter with your Grandstream HT812.

7.1 No Dial Tone

• Check Power: Ensure the power adapter is securely connected and the power indicator light on the HT812 is on.
• Check Phone Connection: Verify that the analog phone is correctly plugged into one of the green FXS ports.
• Check SIP Registration: The phone line indicator light for the connected port should be solid blue. If it's off or blinking, the SIP account may not be registered. Review your SIP configuration in the web interface (Section 4.4).
• Network Connectivity: Ensure the HT812 is connected to the internet and has a valid IP address. Check the internet indicator light.

7.2 Cannot Make or Receive Calls

• SIP Registration: Confirm that your SIP account is successfully registered (solid blue phone line indicator).
• Internet Connection: Verify that your internet connection is active and stable.
• Firewall/NAT Issues: If you are behind a firewall, ensure that the necessary VoIP ports (typically UDP 5060 for SIP and UDP 10000-20000 for RTP) are open or that NAT traversal settings are correctly configured in the HT812 web interface.
• Dial Plan: Check the dial plan configuration in the web interface to ensure it matches your dialing habits and service provider requirements.

7.3 Web Interface Inaccessible

• IP Address: Reconfirm the HT812's IP address using the IVR menu (dial ***02 from a connected phone) or your router's DHCP client list.
• Network Connection: Ensure your computer is on the same local network as the HT812.
• Default Credentials: If you forgot your password, you might need to perform a factory reset (see Section 7.4).

7.4 Factory Reset

A factory reset will restore all settings to their default values. This should be a last resort for troubleshooting.

1. With the HT812 powered on, use a paperclip or a similar pointed object to press and hold the RESET button (located on the rear panel, see Figure 2) for approximately 7 seconds.
2. Release the button when the indicator lights start to flash rapidly.
3. The device will reboot with factory default settings. You will need to reconfigure all settings, including SIP accounts and network parameters.

8. Specifications

9. Warranty and Support

9.1 Product Warranty

Grandstream products are covered by a limited warranty. For detailed warranty information, please refer to the warranty card included with your product or visit the official Grandstream website.

9.2 Technical Support

If you encounter issues that cannot be resolved using the troubleshooting steps in this manual, please contact Grandstream technical support. You can find support resources, FAQs, and contact information on the official Grandstream website: www.grandstream.com/support.