Grandstream HT812 Manual

Analog Telephone Adaptors

 

HT812/HT814
Analog Telephone Adaptors User Guide

COPYRIGHT

©2022 Grandstream Networks, Inc. https://www.grandstream.com
All rights reserved. Information in this document is subject to change without notice. Reproduction or transmittal of the entire or any part, in any form or by any means, electronic or print, for any purpose without the express written permission of Grandstream Networks, Inc. is not permitted.
The latest electronic version of this user manual is available for download here:
https://www.grandstream.com/support
Grandstream is a registered trademark and Grandstream logo is trademark of Grandstream Networks, Inc. in the United States, Europe, and other countries.

CAUTION
Changes or modifications to this product not expressly approved by Grandstream, or operation of this product in any way other than as detailed by this User Manual, could void your manufacturer warranty.

WARNING
Please do not use a different power adaptor with your devices as it may cause damage to the products and void the manufacturer warranty.

GNU GPL INFORMATION

The firmware for the HT812/HT814 contains third-party software licensed under the GNU General Public License (GPL). Grandstream uses software under the specific terms of the GPL. Please see the GNU General Public License (GPL) for the exact terms and conditions of the license.
Grandstream GNU GPL related source code can be downloaded from Grandstream web site from: https://www.grandstream.com/support/faq/gnu-general-public-license/gnu-gpl-information-download

DOCUMENT PURPOSE

call features. Please visit https://www.grandstream.com/support to download the latest “HT812/HT814 Administration Guide” to have more visibility about the configurable settings of your Handy Tones.

This guide covers following topics:

  • Product overview.
  • Getting started.
  • Configuration guide.
  • Call features.
  • Call operations.
  • Upgrading and provisioning.
  • Restore factory default settings.

CHANGE LOG

This section documents significant changes from previous versions of user guide for HT812/HT814. Only major new features or major document updates are listed here. Minor updates for corrections or editing are not documented here.

Firmware Version 1.0.35.4
• No major changes.
Firmware Version 1.0.33.4
• No major changes.
Firmware Version 1.0.31.1
• No major changes.
Firmware Version 1.0.29.8
• No major changes.
Firmware Version 1.0.27.2
• No major changes.
Firmware Version 1.0.25.5
• No major changes.
Firmware Version 1.0.23.5
• No major changes.
Firmware Version 1.0.21.4
• Added support for “Play Busy Tone When Account is unregistered”. [Placing a Phone Call]
Firmware Version 1.0.19.11
• No major changes.
Firmware Version 1.0.17.5
• No major changes.

Firmware Version 1.0.15.4
• No major changes.

Firmware Version 1.0.13.7
• Added the support to verify if configured Gateway is on the same subnet as the configured IP address.

Firmware Version 1.0.11.6
• No major changes.

Firmware Version 1.0.10.6
• Added support for G722 Codec. [HT812/HT814 Technical Specifications]
• Added support for Spanish language in Web UI.

Firmware Version 1.0.9.3
• No major changes

Firmware Version 1.0.8.7
• Added support for Hunting Group on HT812 Web UI.
• Added support for Russian language in Web UI and IVR.

Firmware Version 1.0.5.11
• Changed default “Upgrade Via” from HTTP to HTTPS. [Upgrade Protocol] [UPGRADE PROTOCOL]

• Added support for 3 level access through RADIUS authorization (Admin, User, and viewer).

Firmware Version 1.0.3.7
• No major changes

Firmware Version 1.0.3.2
• No major changes

Firmware Version 1.0.2.7
• No major changes

Firmware Version 1.0.2.3
• Added network check mechanism to enable or disable WAN port web access.

Firmware Version 1.0.2.1
• This is the initial version for HT812/HT814.

WELCOME

The HT812/HT814 analog telephone adapters provides transparent connectivity for analog phones and faxes to the world of internet voice. Connecting to any analog phone, fax, or PBX, the HT812/HT814 are an effective and flexible solution for accessing internet-based telephone services and corporate intranet systems across established LAN and internet connections. The Grandstream Handy Tones HT812/HT814 are a new addition to the popular Handy Tone ATA products family. This manual will help you learn how to operate and manage your HT812/HT814 analog telephone adaptors and make the best use of its many upgraded features including simple and quick installation, 3-way conferencing, direct IP-IP Calling, and new provisioning support among other features. This HT812/HT814 are very easy to manage and configure, and specifically designed to be an easy to use and affordable VoIP solution for both the residential user and the teleworker.

PRODUCT OVERVIEW

The HT812/HT814 are 2/4 ports analog telephone adapters (ATA) that allows users to create a high-quality and manageable IP telephony solution for residential and office environments. Their ultra-compact size, voice quality, advancaed VoIP functionality, security protection and auto provisioning options enable users to take advantage of VoIP on analog phones and enables service providers to offer high quality IP service. The HT812/HT814 are an ideal ATAs for individual use and for large scale commercial IP voice deployments since they permit small and medium businesses to create integrated IP and PSTN telephony systems that efficiently manage communication costs. HT812/HT814’s inclusion of an integrated NAT router and dual 10/100/1000Mbps Ethernet WAN and LAN ports enables a shared broadband connection between multiple Ethernet devices as well as the extension of VoIP services to analog phones.

Feature Highlights
The following table contains the major features of the HT812/HT814:

Table 1: HT812/HT814 Features at a Glance

The HT812/HT814 are 2/4 ports analog telephone adapters (ATA) that allows users to create a high-quality and manageable IP telephony solution for residential and office environments. Their ultra-compact size, voice quality, advancaed VoIP functionality, security protection and auto provisioning options enable users to take advantage of VoIP on analog phones and enables service providers to offer high quality IP service. The HT812/HT814 are an ideal ATAs for individual use and for large scale commercial IP voice deployments since they permit small and medium businesses to create integrated IP and PSTN telephony systems that efficiently manage communication costs. HT812/HT814’s inclusion of an integrated NAT router and dual 10/100/1000Mbps Ethernet WAN and LAN ports enables a shared broadband connection between multiple Ethernet devices as well as the extension of VoIP services to analog phones. Feature Highlights The following table contains the major features of the HT812/HT814: Table 1: HT812/HT814 Features at a Glance

HT812/HT814 Technical Specifications

The following table resumes all the technical specifications including the protocols/standards supported, voice codecs, telephony features, languages, and upgrade/provisioning settings for the HT812/HT814.
Table 2: HT812/HT814 Technical Specifications

 Technical Specifications

GETTING STARTED

This chapter provides basic installation instructions including the list of the packaging contents and also information for obtaining the best performance with the HT812/HT814.

Equipment Packaging

The HT812/HT814 ATAs packages contains:

Equipment Packaging

Note: Check the package before installation. If you find anything missing, contact your system administrator.

HT812/HT814 Ports Description

The following figure describes the different ports on the back panel of the HT812/HT814.

Ports Description

Connecting HT812/HT814
The HT812/HT814 are designed for easy configuration and installation. To connect your HT812/HT814, please follow the steps below:

Scenario 1: Connecting the HT812/HT814 using WAN Port
When connecting HT812/HT814 using the WAN port, they will act as simple DHCP Client.

  • Insert a standard RJ11 telephone cable into the phone ports and connect the other end of the telephone cable to a standard touch-tone analog telephone.
  • Connect the WAN port of the HT812/HT814 to a router, switch or modem using an Ethernet cable.
  • Insert the power adapter into the HT812/HT814 and connect it to a wall outlet and make sure to respect the technical specifications of the power adapter used.
  • Power, WAN and Phone LEDs will be solidly lit when the HT812/HT814 is ready for use.

Scenario 2: Connecting the HT812/HT814 using LAN Port

When connecting the HT812/HT814 using the LAN port, they will act as a router and DHCP serving addresses, the devices connected with HT812/HT814 LAN will pull DHCP addresses from your HT812/HT814.

  1. Insert a standard RJ11 telephone cable into the phone ports and connect the other end of the telephone cable to a standard touch-tone analog telephone.
  2. Connect a computer or switch to the LAN port of the HT812/HT814 using an Ethernet Cable.
  3. Insert the power adapter into the HT812/HT814 and connect it to a wall outlet and make sure to respect the technical specifications of the power adapter used.
  4. Power, LAN, and Phone LEDs will be solidly lit when the HT812/HT814 is ready for use.

Note: Please make sure to enable NAT Router under Web GUI → Basic Settings → Device Mode.

Device Mode.

Table 4: HT812/HT814 LEDs Pattern Description

CONFIGURATION GUIDE

The HT812/HT814 can be configured via one of two ways:

  • The IVR voice prompt menu.
  • The Web GUI embedded on the HT812/HT814 using PC’s web browser.

Obtain HT812/HT814 IP Address via Connected Analogue phone
HT812/HT814 are by default configured to obtain the IP address from DHCP server where the unit is located. In order to know which IP address is assigned to your HT812/HT814, you should access to the “Interactive Voice Response Menu” of your adapter via the connected phone and check its IP address mode.

Please refer to the steps below to access the interactive voice response menu:

  1. Use a telephone connected to phone ports of your HT812/HT814.
  2. Press *** (press the star key three times) to access the IVR menu and wait until you hear “Enter the menu option “.
  3. Press 02 and the current IP address will be announced.

Understanding HT812/HT814 Interactive Voice Prompt Response Menu
The HT812/HT814 have a built-in voice prompt menu for simple device configuration which lists actions, commands, menu choices, and descriptions. The IVR menu works with any phone connected to the HT812/HT814. Pick up the handset and dial “***” to use the IVR menu.

Table 5: Voice Prompt Menu

Table 5: Voice Prompt Menu

Table 5: Voice Prompt Menu

Five success tips when using the voice prompt

  •  “*” shifts down to the next menu option and “#” returns to the main menu
  •  “9” functions as the ENTER key in many cases to confirm or toggle an option.
  •  All entered digit sequences have known lengths – 2 digits for menu option and 12 digits for IP address. For IP address, add 0 before the digits if the digits are less than 3 (i.e. – 192.168.0.26 should be key in like 192168000026. No decimal is needed).
  •  Key entry cannot be deleted but the phone may prompt error once it is detected.

Note: Please make sure to reboot the device after changing network settings (IP Address, Gateway, Subnet…) to apply the new configuration.

Configuration via Web Browser

The HT812/HT814 embedded Web server responds to HTTP GET/POST requests. Embedded HTML pages allow a user to configure the HT812/HT814 through a web browser such as Google Chrome, Mozilla Firefox, and Microsoft’s IE.

  • Microsoft Internet Explorer: version 10 or higher.
  • Google Chrome: version 58.0.3 or higher.
  • Mozilla Firefox: version 53.0.2 or higher.
  • Safari: version 5.1.4 or higher.
  • Opera: version 44.0.2 or higher.

Accessing the Web UI

– Via WAN port

For the initial setup, the Web access is by default enabled when the device is using private IP and disabled when using public IP, and you cannot access the Web UI of your HT812/HT814 until it’s enabled, the following steps will show you how to enable it via IVR.

  1. Power your HT812/HT814 using PSU with the right specifications.
  2. Connect your analog phone to phone ports (FXS) of your HT812/HT814.
  3. Press *** (press the star key three times) to access the IVR menu and wait until you hear “Enter the menu option “.
  4. Press 12, the IVR menu will announce that the web access is disabled, press 9 to enable it.
  5. Reboot your HT812/HT814 to apply the new settings.

Please refer to steps below if your HT812/HT814 is connected via WAN port:

  1. You may check your HT812/HT814 IP address using the IVR on the connected phone. Please see Obtain the HT812/HT814 IP address via the connected analogue phone
  2. Open the web browser on your computer.
  3. Enter the HT812/HT814’s IP address in the address bar of the browser.
  4. Enter the administrator’s password to access the Web Configuration Menu.

Note: The computer must be connected to the same sub-network as the HT812/HT814. This can be easily done by connecting the computer to the same hub or switch as the HT812/HT814.

– Via LAN port

Please refer to steps below if your HT812/HT814 is connected via LAN port:

  1. Power your HT812/HT814 using PSU with the right specifications.
  2. Connect your computer or switch directly to your HT812/HT814 LAN port.
  3. Open the web browser on your computer.
  4. Enter the default LAN IP address (192.168.2.1) in the address bar of the browser.
  5. Enter the administrator’s password to access the Web Configuration Menu.
  6. Make sure to reboot your device after changing your settings to apply the new configuration.

Note: Please make sure that your computer has a valid IP address on the range 192.168.2.x so you can access the web GUI of your HT812/HT814.

Web UI Access Level Management

There are two default passwords for the login page:

Web UI Access Level Management

The password is case sensitive with maximum length of 25 characters.
When changing any settings, always submit them by pressing Update or Apply button on the bottom of the page. After submitting the changes in all the Web GUI pages, if a reboot is required, the web page will prompt the user to reboot by offering a reboot button on the web page.

Saving the Configuration Changes
After users make changes to the configuration, pressing Update button will save but not apply the changes until Apply button is clicked. Users can instead directly press Apply button. When a reboot is required to apply changes, the web page will prompt the user to reboot by offering a reboot button on the web page.

Changing Admin Level Password

Changing Admin Level Password

configuration. Please refer to “Understanding HT812/HT814 Interactive Voice Prompt Response Menu” for
more information about IVR and how to access its menu.
• DHCP MODE
Select voice menu option 01 to allow the HT812/HT814 to use DHCP.
• STATIC IP MODE
Select voice menu option 01 to allow the HT812/HT814 to enable the STATIC IP mode, then use option
02, 03, 04, 05 to set up IP address, Subnet Mask, Gateway, and DNS server respectively.
• PPPOE MODE
Select voice menu option 01 to allow the HT812/HT814 to enable the PPPoE mode. PPPoE Username
and Password should be configured from web GUI.
• FIRMWARE SERVER IP ADDRESS
Select voice menu option 13 to configure the IP address of the firmware server.
• CONFIGURATION SERVER IP ADDRESS
Select voice menu option 14 to configure the IP address of the configuration server.
• UPGRADE PROTOCOL
Select the menu option 15 to choose firmware and configuration upgrade protocol between TFTP, FTP,
FTPS, HTTP and HTTPS. Default is HTTPS.
• FIRMWARE UPGRADE MODE
Select voice menu option 17 to choose firmware upgrade mode among the following three options:
“Always check, check when pre/suffix changes, and never upgrade”.
• WAN PORT WEB ACCESS
Select voice menu option 12 to enable/disable web access from WAN port. Press 9 in this menu to toggle
between enable / disable.
Register a SIP Account
The HT812/HT814 support 2 profiles which can be configured with 2 SIP accounts. Please refer to the
following steps in order to register your accounts via web user interface

  1. Access your HT812/HT814 web UI by entering its IP address in your favorite browser.
  2. Enter your admin password (default: admin).
  3. Press Login to access your settings.
  4. Go to Profile (1 or 2) pages.
  5. In Profile tab, set the following:
    a. Account Active to Yes.
    b. Primary SIP Server field with your SIP server IP address or FQDN.
    c. Failover SIP Server with your Failover SIP Server IP address or FQDN. Leave empty if not
    available.
    d. Prefer Primary SIP Server to No or Yes depending on your configuration. Set to No if no Failover
    SIP Server is defined. If “Yes”, account will register to Primary SIP Server when failover registration
    expires.
    e. Outbound Proxy: Set your Outbound Proxy IP Address or FQDN. Leave empty if not available.
  6.  After configuring the SIP server and activating the profiles, you should access to FXS Ports page to
    register your accounts. In FXS Ports tab, set the following:
    a. SIP User ID: User account information, provided by VoIP service provider (ITSP). Usually in the
    form of digit similar to phone number or actually a phone number.
    b. Authenticate ID: SIP service subscriber’s Authenticate ID used for authentication. Can be identical
    to or different from SIP User ID.
    c. Authenticate Password: SIP service subscriber’s account password to register to SIP server of
    ITSP. For security reasons, the password field will be shown as empty.
    d. Name: Any name to identify this specific user.
    e. Set Enable Port to Yes.
  7.  Press Apply at the bottom of the page to save your configuration.

SIP Profiles Settings

Figure 11: SIP Profiles Settings

Note: When all the FXS ports are registered, the simultaneous ring will have one second delay between each ring on each phone.

Rebooting HT812/HT814 from Remote
Press the “Reboot” button at the bottom of the configuration menu to reboot the ATA remotely. The web browser will then display a message window to confirm that reboot is underway. Wait 30 seconds to log in again.

CALL FEATURES

The HT812/HT814 support all the traditional and advanced telephony features.

Table 6: HT812/HT814 Call Features

Table 6: HT812/HT814 Call Features

CALL OPERATIONS

Placing a Phone Call
To make the outgoing calls using your HT812/HT814

  1. Pick up the handset of the connected phone.
  2. Dial the number directly and wait for 4 seconds (Default “No Key Entry Timeout”); or
  3. Dial the number directly and press # (Use # as dial key” must be configured in web configuration).

Examples:

  1. Dial an extension directly on the same proxy, (e.g., 1008), and then press the # or wait for 4 seconds.
  2. Dial an outside number (e.g. (626) 666-7890), first enter the prefix number (usually 1+ or
    international code) followed by the phone number. Press # or wait for 4 seconds. Check with your
    VoIP service provider for further details on prefix numbers.

Note:
When placing the analog phone that is connected to the FXS port off hook, the dial tone will be played even
if the sip account is not registered. If users prefer the busy tone to be played instead, the following
configuration need to be made:

  • “Play Busy Tone When Account is unregistered” need to be set to YES under advanced
    settings.
  • “Outgoing call without registration” need to be set to NO under Profile x settings.
    Direct IP Calls
    Direct IP calling allows two parties, that is, a FXS Port with an analog phone and another VoIP Device, to
    talk to each other in an ad hoc fashion without a SIP proxy.
    Elements necessary to completing a Direct IP Call:
  • Both HT812/HT814 and other VoIP Device, have public IP addresses, or
  • Both HT812/HT814 and other VoIP Device are on the same LAN using private IP addresses, or
  • Both HT812/HT814 and other VoIP Device can be connected through a router using public or private
    IP addresses (with necessary port forwarding or DMZ).

The HT812/HT814 support two ways to make Direct IP Calling:

Using IVR

  1. Pick up the analog phone then access the voice menu prompt by dialing “***”
  2. Dial “47” to access the direct IP call menu
  3. Enter the IP address after the dial tone and voice prompt “Direct IP Calling”

Using Star Code

  1. Pick up the analog phone then dial “*47”
  2. Enter the target IP address.

Note: No dial tone will be played between step 1 and 2 and destination ports can be specified using “*”
(encoding for “:”) followed by the port number.

Examples of Direct IP Calls:

a) If the target IP address is 192.168.0.160, the dialing convention is *47 or Voice Prompt with option
47, then 192*168*0*160, followed by pressing the “#” key if it is configured as a send key or wait 4 seconds.
In this case, the default destination port 5060 is used if no port is specified

b) If the target IP address/port is 192.168.1.20:5062, then the dialing convention would be: *47 or Voice
Prompt with option 47, then 192*168*0*160*5062 followed by pressing the “#” key if it is configured as a
send key or wait for 4 seconds.

Note: When completing direct IP call, the “Use Random SIP/RTP Port” should set to “NO”.

Call Hold
You can place a call on hold by pressing the “flash” button on the analog phone (if the phone has that
button).

Press the “flash” button again to release the previously held Caller and resume conversation. If no “flash”
button is available, use “hook flash” (toggle on-off hook quickly). You may drop a call using hook flash.

Call Waiting
The call waiting tone (3 short beeps) indicates an incoming call, if the call waiting feature is enabled.
To toggle between incoming call and current call, you need to press the “flash” button the first call is placed
on hold.

Press the “flash” button to toggle between the active calls.

Call Transfer
Blind Transfer
Assume that the call is established between phone A and B are in conversation. The phone A wants to blind
transfer phone B to phone C:

  1. On the phone A presses FLASH to hear the dial tone.
  2. The phone A dials *87 then dials caller C’s number, and then # (or wait for 4 seconds)
  3.  The phone A will hear the dial tone. Then, A can hang up.

Note: “Enable Call Feature” must be set to “Yes” in web configuration page.

Attended Transfer
Assume that the call is established between phone A and B are in conversation. The phone A wants to
attend transfer phone B to phone C:

  1. On the phone A presses FLASH to hear the dial tone.
  2. Phone A dials the phone C’s number followed by # (or wait for 4 seconds).
  3. If phone C answers the call, phones A and C are in conversation. Then A can hang up to complete
    transfer.
  4. If phone C does not answer the call, phone A can press “flash” to resume call with phone B.

Note: When attended transfer fails and A hangs up, the HT812/HT814 will ring back user A to remind A that
B is still on the call. A can pick up the phone to resume conversation with B.

3-Way conferencing
The HT812/HT814 support Bellcore style 3-way Conference. To perform the 3-way conference, we assume
that the call is established between phone A and B are in conversation. Phone A(HT812/HT814) wants to
bring third phone C into conference:

  1. Phone A presses FLASH (on the analog phone, or Hook Flash for old model phones) to get a dial
    tone.
  2. Phone A dials C’s number then # (or wait for 4 seconds).
  3. If phone C answers the call, then A presses FLASH to bring B, C in the conference.
  4. If phone C does not answer the call, phone A can press FLASH back to talk to phone B.
  5. If phone A presses FLASH during conference, the phone C will be dropped out.
  6. If phone A hangs up, the conference will be terminated for all three parties when configuration
    “Transfer on Conference Hang up” is set to “No”. If the configuration is set to “Yes”, A will transfer
    B to C so that B and C can continue the conversation.

Call Return
In order to call back to the latest incoming number.

  1. Pick up the handset of the connected phone (Off-hook).
  2. After hearing the dial tone, input “*69”.
  3. Your phone will automatically call back to the latest incoming number

Note: All star codes (*XX) related features mentioned above are supported by ATA default settings. If your
service provider provides different feature codes, please contact them for instructions.

Inter-Port Calling
In some cases, a user may want to make phone calls between the phones connected to multiple ports of
the same HT81x when it is used as a standalone unit, without the use of a SIP server. In such cases, users
still will be able to make inter-port calls by using the IVR feature.
On the HT81x inter-port calling is achieved by dialing ***70X (X is the port number). For example, the user
connected to port 1 can be reached by dialing *** and 701.

Voice Mail
VM Notification
The HT812/HT814 indicates new voice mail messages using Phone LEDs and Stutter Tone.
The Phone LEDs on HT812/HT814 will start blinking slowly when a new voice mail message is available
on corresponding account.

A stutter tone will be played at first few seconds followed by dial tone when picking up the handset.

Note: New VM messages can be also indicated by LED blink, screen display, etc.… if they are supported
on connected analog phones.

Accessing VM
To retrieve the new voice mail messages received, please refer to following steps:

  1. Pick up the handset of the connected phone (stutter tone will be played).
  2. Press *** (press the star key three times) to access the IVR menu and wait until you hear “Enter
    the menu option “.
  3. Press 86 and enter your configured password (if exist) to access your voice mail menu.

Flash Digit Control
If the option “Flash Digit Control” is enabled on web UI, call operations will require different steps as follows:

Call Hold:
Assume that the call is established between phone A and B.
The phone A received a call from C, then it held B to answer C.
Press the “Flash + 1” to hang up the current call (A – C) and resume call on hold (B).
Or press “Flash + 2” to hold current call (A – C) and resume call on hold (B).

Attended transfer:
Assume that the call is established between phone A and B. The phone A wants to attend transfer
phone B to phone C:

  1. On the phone A presses FLASH to hear the dial tone.
  2. Phone A dials the phone C’s number followed by # (or wait for 4 seconds).
  3. If phone C answers the call, phones A and C are in conversation. Then A can press “Flash + 4”
    to complete transfer.

3-Way Conferencing:
Assume that the call is established, and phone A and B are in conversation. Phone A(HT801/HT802)
wants to bring third phone C into conference:

  • Phone A presses Flash (on the analog phone, or Hook Flash for old model phones) to get a dial
    tone.
  • Phone A dials C’s number then # (or wait for 4 seconds).
  • When phone C answers the call, then A can press “Flash +3” to bring B, C in the conference.

RESTORE FACTORY DEFAULT SETTINGS

Warning:
Restoring the Factory Default Settings will delete all configuration information on the phone. Please backup
or print all the settings before you restore to the factory default settings. Grandstream is not responsible for
restoring lost parameters and cannot connect your device to your VoIP service provider.

There are three (3) methods for resetting your unit:

Using the Reset Button
To reset default factory settings using the reset button please follow the steps above:

  1. Unplug the Ethernet cable.
  2. Locate the reset hole on the back panel of your HT812/HT814.
  3. Insert a pin in this hole, and press for about 7 seconds.
  4. Take out the pin. All unit settings are restored to factory settings

Using the IVR Command
Reset default factory settings using the IVR prompt:

  1. Dial “***” for voice prompt.
  2. Enter “99” and wait for “reset” voice prompt.
  3. Enter the encoded MAC address (Look below on how to encode MAC address).
  4. Wait 15 seconds and device will automatically reboot and restore factory settings.

Encode the MAC Address

  1. Locate the MAC address of the device. It is the 12-digit HEX number on the bottom of the unit.
  2. Key in the MAC address. Use the following mapping:

Table 7: MAC Address Key Mapping

D     33 (press the “3” key twice, “D” will show on the LCD)
E      333
F     3333

For example: if the MAC address is 000b8200e395, it should be keyed in as “0002228200333395”

EXPERIENCING HT812/HT814

Please visit our website: https://www.grandstream.com to receive the most up- to-date updates on firmware
releases, additional features, FAQs, documentation, and news on new products.
We encourage you to browse our product related documentation, FAQs and User and Developer Forum
for answers to your general questions. If you have purchased our products through a Grandstream
Certified Partner or Reseller, please contact them directly for immediate support.

Our technical support staff is trained and ready to answer all of your questions. Contact a technical support
member or submit a trouble ticket online to receive in-depth support.

Thank you again for purchasing Grandstream analogue telephone adapter, it will be sure to bring
convenience to both your business and personal life.


Downloads

Grandstream HT812 Manual -[ Download PDF ]


 

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