Huawei HG523 User manual

HUAWEI HG523 Home Gateway
User Guide
HUAWEI TECHNOLOGIES CO., LTD.

HUAWEI HG523 Home Gateway
V100R001
User Guide
Issue
01
Date
2011-12-20
Part Number
202436
Huawei Technologies Co., Ltd. provides customers with comprehensive
technical support and service. Please feel free to contact our local office
or company headquarters.
Huawei Technologies Co., Ltd.
Address:
Huawei Industrial Base
Bantian, Longgang
Shenzhen 518129
People's Republic of China
Website:
http://www.huawei.com
Email:
[email protected]

Copyright © Huawei Technologies Co., Ltd. 2011. All
rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means
without prior written consent of Huawei Technologies Co., Ltd.
The product described in this manual may include copyrighted software of Huawei
Technologies Co., Ltd and possible licensors. Customers shall not in any manner
reproduce, distribute, modify, decompile, disassemble, decrypt, extract, reverse
engineer, lease, assign, or sublicense the said software, unless such restrictions are
prohibited by applicable laws or such actions are approved by respective copyright
holders under licenses.
Trademarks and Permissions
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are trademarks or registered trademarks of Huawei
Technologies Co., Ltd.
Other trademarks, product, service and company names mentioned are the property of
their respective owners.
Notice
Some features of the product and its accessories described herein rely on the software
installed, capacities and settings of local network, and may not be activated or may be
limited by local network operators or network service providers. Thus the descriptions
herein may not exactly match the product or its accessories you purchase.
Huawei Technologies Co., Ltd reserves the right to change or modify any information or
specifications contained in this manual without prior notice or obligation.
NO WARRANTY
THE CONTENTS OF THIS MANUAL ARE PROVIDED “AS IS’’. EXCEPT AS
REQUIRED BY APPLICABLE LAWS, NO WARRANTIES OF ANY KIND, EITHER
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE, ARE MADE IN RELATION TO THE ACCURACY, RELIABILITY OR
CONTENTS OF THIS MANUAL.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO CASE
SHALL HUAWEI TECHNOLOGIES CO., LTD BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES, OR LOST PROFITS,
BUSINESS, REVENUE, DATA, GOODWILL OR ANTICIPATED SAVINGS.
Import and Export Regulations
Customers shall comply with all applicable export or import laws and regulations and will
obtain all necessary governmental permits and licenses in order to export, re-export or
import the product mentioned in this manual including the software and technical data
therein.

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Contents
1Warnings and Precautions ....................................................................... 1
2Connecting the Cables and Getting Started............................................ 4
2.1 Connecting the Cables..................................................................................4
2.2 Getting Started .............................................................................................5
3Setting the Network-Access Parameters ................................................. 5
3.1 Accessing the Network Through the Embedded PPP Dial-Up Software on
the HG523 ...........................................................................................................5
3.2 Accessing the Network Through the PPP Dial-Up Software on Your
Computer .............................................................................................................6
4Configuring the Wireless Network Connection...................................... 7
5Configuring the HG523 ............................................................................ 9
5.1 Changing the Administrator Password Used for Logging in to the
Web-Based Configuration Utility ........................................................................9
5.2 Enabling or Disabling the Wireless Network Function ................................9
5.3 Changing the Wireless Network Name and the Access Password..............10
5.4 Changing the IP Address Used for Logging in to the Web-Based
Configuration Utility .........................................................................................10
5.5 Restoring the Default Settings....................................................................10
6FAQs......................................................................................................... 11
7Appendix .................................................................................................. 14
7.1 Indicators....................................................................................................14

ii
7.2 Interfaces and Buttons ................................................................................15
7.3 Default Settings..........................................................................................16
7.4 Technical Specifications.............................................................................16

1
1 Warnings and Precautions
To use the device properly and safely, read these warnings and precautions carefully
and strictly observe them during operation. Unless otherwise specified, the term
"device" refers to the device and its accessories.
Basic Requirements
During storage, transportation, and operation of the device, keep it dry and prevent
it from colliding with other objects.
Do not dismantle the device. In case of any fault, contact an authorized service
center for assistance or repair.
Without authorization, no organization or individual can change the mechanical,
safety, or performance design of the device.
When using the device, observe all applicable laws and regulations and respect the
legal rights of other people.
Environmental Requirements for Using the Device
Before connecting and disconnecting cables, stop using the device, and then
disconnect it from the power supply. Ensure that your hands are dry during
operation.
Keep the device far from sources of heat and fire, such as a heater or a candle.
Keep the device far from electronic appliances that generate strong magnetic or
electric fields, such as a microwave oven or a refrigerator.
Place the device on a stable surface.
Place the device in a cool and well-ventilated indoor area. Do not expose the device
to direct sunlight. Use the device in an area with a temperature ranging from 0°C to
40°C.
Do not block the openings on the device with any object. Reserve a minimum space
of 10 cm around the device for heat dissipation.
Do not place any object (such as a candle or a water container) on the device. If any
foreign object or liquid enters the device, stop using the device immediately, power
it off, remove all the cables connected to it, and then contact an authorized service
center.
During thunderstorms, power off the device, and then remove all the cables
connected to it to prevent it from getting damaged due to lightning strikes.

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Precautions for Using Wireless Devices
When using the device, ensure that the antenna of the device is at least 20 cm away
from all persons.
Do not use the device where using wireless devices is prohibited or may cause
interference or danger.
The radio waves generated by the device may interfere with the operation of
electronic medical devices. If you are using any electrical medical device, contact
its manufacturer for the restrictions on the use of the device.
Do not take the device into operating rooms, intensive care units (ICUs), or
coronary care units (CCUs).
Areas with Inflammables and Explosives
Do not use the device where inflammables or explosives are stored, for example, in
a gas station, oil depot, or chemical plant. Otherwise, explosions or fires may occur.
In addition, follow the instructions indicated in text or symbols.
Do not store or transport the device in the same box as inflammable liquids, gases,
or explosives.
Accessory Requirements
Use only the accessories supplied or authorized by the device manufacturer.
Otherwise, the performance of the device may get affected, the warranty for the
device or the laws and regulations related to telecommunications terminals may
become null and void, or an injury may occur.
Do not use the power adapter if its cable is damaged. Otherwise, electric shocks or
fires may occur.
Ensure that the power adapter meets the specifications indicated on the device
nameplate.
Ensure that the power adapter meets the requirements of Clause 2.5 in
IEC60950-1/EN60950-1 and it is tested and approved according to national or local
standards.
For pluggable device, the socket-outlet shall be installed near the device and shall
be easily accessible.

3
Safety of Children
Keep the device and its accessories out of the reach of children. Otherwise, they may
damage the device and its accessories by mistake, or they may swallow the small
components of the device, causing suffocation or other dangerous situations.
Maintenance
If the device is not used for a long time, power it off, and then remove all the cables
connected to it.
If any exception occurs, for example, if the device emits any smoke or unusual
sound or smell, stop using the device immediately, power it off, remove all the
cables connected to it, and then contact an authorized service center.
Do not trample, pull, or overbend any cable. Otherwise, the cable may get damaged,
causing malfunction of the device.
Before cleaning the device, stop using it, power it off, and then remove all the
cables connected to it.
Use a clean, soft, and dry cloth to clean the device shell. Do not use any cleaning
agent or spray to clean the device shell.
Environmental Protection
Do not dispose of the device and the accessories in a garbage can.
Dispose of the device according to the local regulations on disposing of packing
materials, exhausted batteries and abandoned devices, and support the recycling
activity.

4
2 Connecting the Cables and Getting
Started
2.1 Connecting the Cables
The following figure shows how to connect the cables of the HG523.
####
####
####
#
1. Power adapter
2. Set-Top Box
3. Computer
4. Telephone
5. Splitter
6. Telephone jack on the wall
If the wireless network function is used on the HG523 for the
network access, you do not need to connect the cables.

5
2.2 Getting Started
To power on the HG523, press the power button on the top of the HG523.
After you power on the HG523, the ADSL indicator blinks (for less than three minutes),
which indicates that the HG523 is being activated. Later, the ADSL indicator turns
solid on. The Power indicator is also solid on, which indicates that the HG523 is
working properly.
3 Setting the Network-Access Parameters
By configuring the HG523 and your computer, you can choose any of the following
methods to surf the Internet:
Accessing the Network Through the Embedded PPP Dial-Up Software on the
HG523
Accessing the Network Through the PPP Dial-Up Software on Your Computer
3.1 Accessing the Network Through the
Embedded PPP Dial-Up Software on the HG523
If you select this method for accessing the network, the HG523 starts to set up a dial-up
connection automatically after the startup. You can access the network after you power
on your computer. You do not need to install any special dial-up software on your
computer or perform dial-up operations on your computer. To configure the HG523 and
your computer for the network access, do as follows:
Step 1 Log in to the Web-based configuration utility of the HG523.
1. Launch the Internet Explorer on your computer. Enter http://192.168.1.1
in the address bar, and then press Enter.
2. In the displayed dialog box, enter the user name and the password, and
then click OK.
By default, both the user name and the password are admin. After the user name and
the password are verified, you can access the Web-based configuration utility.
Step 2 Enable the embedded dial-up function.
1. In the navigation tree on the left of the configuration page, choose Basic >
WAN Setting.
2. Select a PVC number, such as 1, from the PVC drop-down combo box.
3. In the VPI and VCI text boxes, enter the VPI and VCI values that are
provided by the Internet Service Provider.

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4. Select Yes from the Active drop-down combo box and select Routing
from the Mode drop-down combo box.
5. Select PPPoE from the Encapsulation drop-down combo box.
6. Enter the user name and password in the Login Information dialog box
and keep the default settings of other parameters.
7. Click Submit to save the settings.
After you complete the preceding settings, you can surf the Internet.
You need to perform the preceding operations on a computer once only. The next time
when you power on your computer, you can surf the Internet without any configuration.
3.2 Accessing the Network Through the PPP
Dial-Up Software on Your Computer
If you select this method for accessing the network, you need to install and configure
the dial-up software on your computer. In addition, you need to perform dial-up
operations on your computer upon each startup. To configure the HG523 and your
computer for the network access, do as follows:
Step 1 Set the working mode of the HG523 to Bridge.
For details, refer to the procedure for enabling the embedded dial-up function described
in Step 2 in section 3.1 "Accessing the Network Through the Embedded PPP Dial-Up
Software on the HG523." Note that Bridge is selected from the Mode drop-down
combo box.
Step 2 Install and configure the PPP dial-up software on your computer.
The PPP dial-up software is pre-installed on certain computer operating systems. To
create a dial-up connection, do as follows (taking the Windows XP operating system as
an example):
1. Choose Start > All Programs > Accessories > Communications >
Network Connections.
2. Click Create a new connection in Network Tasks to display the New
Connection Wizard window, and then click Next.
3. Select Connect to the Internet, and then click Next.
4. Select Set up my connection manually, and then click Next.
5. Select Connect using a broadband connection that requires a user
name and password, and then click Next.
6. Enter the name (as desired) of the dial-up connection in ISP Name, and
then click Next.
7. Select Anyone's use or My use only, and then click Next.
8. Enter the user name and password provided by the Internet Service
Provider and used for the dial-up connection, and then click Next.
9. Select Add a shortcut to this connection to my desktop, and then click
Finish.

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An icon for the dial-up connection is displayed on the desktop of your computer.
You need to perform the preceding operations only once for creating a network
connection. After the network connection is created, to access the network,
double-click the icon for the dial-up connection, and then click Connect in the
displayed dialog box.
4 Configuring the Wireless Network
Connection
If a wireless network adapter is installed on your computer, you can connect you
computer to the HG523 through a wireless network connection.
The hardware installation methods and driver installation methods of
wireless network adapters provided by different companies vary from each
other. For details, see the installation guide provided by the wireless
network adapter provider.
After the installation of a wireless network adapter, you need to configure the wireless
network connection on your computer. You can configure the wireless network
connection through the software provided with the wireless network adapter. If the
Windows XP operating system is used, you can also configure the wireless network
connection through the wireless configuration software provided by Windows XP.
To configure the wireless network connection, do as follows (taking the Windows XP
operating system as an example):
Step 1 Log in to the Web-based configuration utility.
1. Launch the Internet Explorer on your computer. Enter http://192.168.1.1
in the address bar, and then press Enter.
2. In the displayed dialog box, enter the user name and the password, and
then click OK.
By default, both the user name and the password are admin.
Step 2 Set the wireless network name and access password of the HG523.
To set the wireless network name and the access password, do as follows (taking the
authentication type WPA-PSK as an example):
1. In the navigation tree on the left of the Web-based configuration utility,
choose Basic > Wireless Lan.
2. Select the Enable option button of Access Point.
3. Enter a wireless network name in the SSID text box.
4. Select WPA-PSK from the Authentication Type drop-down combo
box.
5. Select AES from the Encryption drop-down combo box.

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6. Enter an access password in the Pre-Shared Key text box.
7. Click Submit to save the settings.
Step 3 Enable the wireless configuration service provided by Windows XP.
1. Right-click My Computer, and then choose Manage from the shortcut
menu.
2. In the Computer Management window, choose Computer
Management (Local) > Services and Applications >Services.
3. From the services listed in the right pane of the Computer Management
window, right-click Wireless Zero Configuration, and then choose
Properties from the shortcut menu.
4. In the Wireless Zero Configuration Properties (Local Computer)
dialog box, check whether Service status is Started. If not, click the
Start button.
5. Click OK to close the dialog box. Then, close the Computer
Management window.
Step 4 Configure the wireless network connection on your computer.
1. Choose Start > All Programs > Accessories > Communications >
Network Connections.
2. In the Network Connections window, right-click Wireless Network
Connection to display a shortcut menu, and then choose Properties from
the shortcut menu.
3. In the Wireless Network Connection Properties dialog box, select
Wireless Networks.
4. Select Use Windows to configure my wireless network settings.
5. Click View Wireless Networks.
6. Select the wireless network that is configured in Step 2, and then click
Connect in the lower right corner of the window.
7. In the displayed dialog box, enter the access password that is preset in
Step 2, and then click Connect.
After the password is verified, Connected appears on the icon of the wireless network
in the wireless network list, which indicates that the computer is connected to the
HG523 through a wireless network connection.
8. Close the Wireless Network Connection dialog box.
9. In the Wireless Network Connection Properties dialog box, click OK.

9
5 Configuring the HG523
5.1 Changing the Administrator Password Used
for Logging in to the Web-Based Configuration
Utility
For safety reasons or to make the password easy to remember, you can change the
administrator password for login after logging in to the Web-based configuration
utility.
To change the password, do as follows:
Step 1 Log in to the Web-based configuration utility.
Step 2 Choose Tools > System Management in the navigation tree to display the
system management page.
Step 3 Click to display a dialog box.
Step 4 Enter the old password in the Old Password text box. Enter the new
password in the New Password text box. Then enter the new password again
in the Retype to confirm text box for confirmation.
Step 5 Click Submit to save the settings.
After you change the password successfully, the current page jumps to the page for
logging in to the Web-based configuration utility. To log in to the Web-based
configuration utility, enter the new password, and then click OK.
If you forget the user name or password that has been changed, you can
restore the default settings of the HG523 by pressing and holding the Reset
button for over six seconds. Then, the user name and password that are
used for logging in to the Web-based configuration utility are restored to
default values. After you restore the default settings, however, your
customized data is lost. Therefore, use this function with caution.
5.2 Enabling or Disabling the Wireless
Network Function
The WLAN indicator shows whether the wireless network function is enabled.
you can enable or disable the wireless network function through the Web-based
configuration utility, do as follows:
Step 1 Log in to the Web-based configuration utility.
Step 2 In the navigation tree on the left, choose Basic > Wireless Lan.

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Step 3 Select the Enable or Disable option button of Access Point.
Step 4 Click Submit to save the settings.
5.3 Changing the Wireless Network Name and
the Access Password
To change the name and access password for the wireless network, do as follows
(taking the authentication type WPA-PSK as an example):
Step 1 Log in to the Web-based configuration utility.
Step 2 In the navigation tree on the left, choose Basic > Wireless Lan.
Step 3 Enter a wireless network name in the SSID text box.
Step 4 Select WPA-PSK from the Authentication Type drop-down combo box.
Step 5 Select AES from the Encryption drop-down combo box.
Step 6 Enter an access password in the Pre-Shared Key text box.
Step 7 Click Submit to save the settings.
5.4 Changing the IP Address Used for Logging
in to the Web-Based Configuration Utility
To make the login IP address easy to remember, you can change the IP address after
logging in to the Web-based configuration utility.
To change the IP address, do as follows:
Step 1 Choose Basic > LAN Setting in the navigation tree to display the LAN
settings page.
Step 2 Enter a new IP address as desired in the Main IP Address text box. Then
enter a subnet mask in the Main Subnet Mask.
Step 3 Click Submit to save the settings.
To log in to the Web-based configuration utility after you change the IP
address successfully, you need to launch the Internet Explorer, and then
enter the new IP address in the address bar. Ensure that the IP address of
the computer is in the same network segment as that of the HG523 so that
the computer can access the Web-based configuration utility.
5.5 Restoring the Default Settings
You can quickly restore the default settings of the HG523 by pressing the Reset button
on the rear panel. To restore the default settings, press and hold the Reset button for

11
over six seconds after the HG523 is powered on, and then release the button. In addition,
you can restore the default settings of the HG523 through the Web-based configuration
utility. To restore the default settings through the Web-based configuration utility, do as
follows:
Step 1 Log in to the Web-based configuration utility, and then choose Tools >
Reboot in the navigation tree to display the reboot page.
Step 2 Select Factory Default Settings.
Step 3 Click Restart.
After the preceding operations, the page jumps to the login page. You can log in to the
Web-based configuration utility by entering the default user name and password.
6 FAQs
How can I quickly restore the default settings of the terminal?
To restore the default settings, press and hold the Reset button on the rear panel for
over six seconds after the HG523 is powered on, and then release the button.
What can I do if I cannot access the Internet through the terminal?
Step 1 Check whether the Power indicator on the terminal is solid on.
If the Power indicator is off, perform further checks as follows:
1. Ensure that the terminal is turned on.
2. Ensure that electricity comes from the socket and that the power input
from the socket meets the requirements described on the label of the
terminal power adapter. If the voltage is unsteady, for example, if the
voltage is too high or too low, do not use the terminal. Wait until the
voltage restores to its normal level, and then use the terminal.
3. Ensure that the terminal is properly connected to the socket through
the power adapter.
If the Power indicator is still off, contact an authorized maintenance
center.
Step 2 After powering on the terminal, wait for about three minutes. Then, check
whether the ADSL indicator on the terminal is solid on.
If the ADSL indicator blinks for a long time, perform further checks as
follows:
1. Ensure that telephone lines are properly connected. Pay special
attention to the connections between the telephone lines and the
splitter.
2. Ensure that the terminal or telephone lines are far from the electric

12
appliances that generate strong magnetic or electric fields. Replace
telephone lines when necessary.
If the ADSL indicator still blinks and does not turn solid on, contact your
Internet Service Provider.
Step 3 Check whether the LAN indicator of the terminal is on.
If the LAN indicator is off, perform further checks as follows:
1. Ensure that the network adapter of the computer is enabled.
2. Ensure that the network cable between the terminal and the computer
is properly connected. Remove and then insert the network cable or
replace the network cable when necessary.
If the LAN indicator is still off, contact an authorized maintenance center.
Step 4 Check whether the driver for the network adapter is properly installed.
Take a computer that runs Windows XP as an example. To check whether
the driver for the network adapter is installed, do as follows:
1. On the desktop, right-click My Computer, and then choose Manage.
2. In the navigation tree of the Computer Management window,
choose Device Manager.
3. In the right pane of the Computer Management window, click
Network adapters to view the information about the network adapter
of the computer.
If no network adapter is found or if a question mark (?) or an exclamation
mark (!) is displayed next to the icon of the network adapter, you can infer
that the driver for the network adapter is not properly installed. In this
case, re-install the driver for the network adapter of the computer.
Step 5 Ensure that you have entered the correct user name and user password that
are required by the PPP dial-up software.
The user name and the user password are provided by your Internet
Service Provider.
Step 6 Check whether you can use the PPP dial-up software to dial successfully.
If you cannot use the PPP dial-up software to dial successfully, perform
further checks as follows:
1. Stop the PPP dial-up software and then power off the terminal. After
five minutes, power on the terminal, and then use the PPP dial-up
software to dial again.
2. Restore the default settings of the terminal.
If the problem persists, contact your Internet Service Provider.
Step 7 Check whether the proxy server of the Web browser is correctly
configured. Take the Internet Explorer installed on a computer that runs
Windows XP as an example. To check whether the proxy server of the

13
Web browser is correctly configured, do as follows:
1. Launch the Internet Explorer.
2. Choose Tools > Internet Options.
3. In the Internet Options dialog box, click the Connections tab.
4. In the Local Area Network (LAN) settings group box, click LAN
Settings.
5. In the Proxy server group box of the Local Area Network (LAN)
Settings dialog box, ensure that the Use a proxy server for your
LAN (These settings will not apply to dial-up or VPN
connections) is not selected.
Step 8 Try to access multiple Web sites to check whether the terminal can access
these Web sites.
If the terminal still cannot access Web sites, contact your network service
provider.
What can I do if Web pages often cannot be displayed during Web page browsing
and can be displayed after the terminal is restarted?
Step 1 Ensure that the terminal and other devices, such as telephones or fax
machines, are connected to telephone lines through a splitter.
For details about how to install a splitter, see the related description in the
manual.
Step 2 Ensure that telephone lines are properly connected.
If the telephone lines are improperly connected, the stability of the
network connection is affected.
Step 3 Check the positions of your terminal and your computer. Ensure that they
are far from electric appliances, such as microwave ovens, refrigerators,
or cordless telephones, that generate strong magnetic or electric fields.
If the problem persists, contact your service provider.
What can I do if sometimes the terminal cannot access the Internet through a WLAN
connection or if the WLAN connection is unsteady?
Step 1 Check the positions of your terminal and your computer. Ensure that they
are far from the electric appliances, such as microwave ovens,
refrigerators, or cordless telephones, that generate strong magnetic or
electric fields.
Step 2 Place your terminal in an open area.
Although radio signals can pass through obstacles, the transmission
effects of WLAN radio signals are affected if radio signals pass through
too many obstacles, such as cement or wooden walls.

14
Step 3 Place your computer close to your terminal.
If your computer is far from your terminal, the effects of the WLAN are
affected.
Step 4 Place your terminal and computer in another direction.
Step 5 Do not use your terminal to access the WLAN during thunderstorms.
After a broadband terminal is installed, does Internet access degrade call quality or
do telephone calls lower the Internet access rate?
No. The terminal uses the frequency division multiplexing (FDM) and splitter
technologies to separate voice signals from data signals. Although the two types of
signals are transmitted through one telephone line, they are carried by different
frequency bands. Therefore, they do not interfere with each other. In this case, you
can make a telephone call and access the Internet simultaneously, without degrading
call quality or lowering the Internet access rate.
7 Appendix
7.1 Indicators
Indicator
Status
Description
Power
Solid on
The HG523 is powered on.
Off
The HG523 is powered off.
ADSL
Blinking
The HG523 is being activated.
Solid on
The HG523 is activated.
Off
The HG523 is powered off.
WLAN
Blinking
The wireless network function is enabled.
Data is being transmitted through the WLAN.
Solid on
The wireless network function is enabled.
No data is being transmitted through the WLAN.
Off
The wireless network function is disabled.

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Indicator
Status
Description
Internet
Blinking
The HG523 works in routing mode.
The WAN connection is set up.
Data is being transmitted.
Solid on
The HG523 works in routing mode.
The WAN connection is set up.
No data is being transmitted.
Off
The HG523 works in bridge mode.
The HG523 works in routing mode, but no WAN
connection is set up.
LAN
Blinking
Data is being transmitted through the Ethernet
interface.
Solid on
The Ethernet connection is set up.
Off
The Ethernet connection is not set up.
7.2 Interfaces and Buttons
Interface or
Button
Description
Power
It is used to connect the power adapter.
LAN
It is used to connect to the Ethernet interface on the computer.
Reset
You can press and hold the Reset button for over six seconds to
restore the default settings of the HG523.
Note: After you restore the default settings, your customized
data is lost. Therefore, use this function with caution.
ADSL
It is used to connect to the MODEM interface on the splitter.
WLAN
It is used to enable or disable wireless network function quickly.
It is the power switch and is used to power on or power off the
HG523.