Huawei B2268H Router Manual PDF (Setup & Configuration Guide)

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LTE TDD B2268H

User Guide

25 Troubleshooting

Issue 01 (2014-01-15)

144

25

Troubleshooting

25.1 Overview

This chapter offers some suggestions to solve problems you might encounter. The potential

problems are divided into the following categories.



Power, Hardware Connections, and LEDs



LTE Device Access and Login



Internet Access



Wireless Internet Access



Phone Calls and VoIP



UPnP

25.2 Power, Hardware Connections, and LEDs

The LTE Device does not turn on. None of the LEDs turn on.

Step 1

Make sure the LTE Device is turned on.

Step 2

Make sure you are using the power adaptor or cord included with the LTE Device.

Step 3

Make sure the power adaptor or cord is connected to the LTE Device and plugged in to an

appropriate power source. Make sure the power source is turned on.

Step 4

Turn the LTE Device off and on.

Step 5

If the problem continues, contact the vendor.

----End

One of the LEDs does not behave as expected.

Step 1

Make sure you understand the normal behavior of the LED. See Section 1.6.

Step 2

Check the hardware connections. See the Quick Start Guide.

Step 3

Inspect your cables for damage. Contact the vendor to replace any damaged cables.

Step 4

Turn the LTE Device off and on.

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LTE TDD B2268H

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Step 5

If the problem continues, contact the vendor.

----End

25.3 LTE Device Access and Login

I forgot the IP address for the LTE Device.

Step 1

The default IP address is 192.168.1.1.

Step 2

If you changed the IP address and have forgotten it, you might get the IP address of the LTE

Device by looking up the IP address of the default gateway for your computer. To do this in

most Windows computers, click

Start > Run

, enter

cmd

, and then enter

ipconfig

. The IP

address of the

Default Gateway

might be the IP address of the LTE Device (it depends on the

network), so enter this IP address in your Internet browser.

Step 3

If this does not work, you have to reset the device to its factory defaults. See Section 1.7.

----End

I forgot the password.

Step 1

The default password is

LTEcpe

.

Step 2

If you can't remember the password, you have to reset the device to its factory defaults. See

Section 1.7 on page 6.

----End

I cannot see or access the

Login

screen in the web configurator.

Step 1

Make sure you are using the correct IP address.

The default IP address is 192.168.1.1.

If you changed the IP address, use the new IP address.

If you changed the IP address and have forgotten it, see the troubleshooting suggestions for I

forgot the IP address for the LTE Device.

Step 2

Check the hardware connections, and make sure the LEDs are behaving as expected. See the

Quick Start Guide.

Step 3

Check to make sure your computer does not have a static IP address.

Step 4

Check to make sure your web browser is not using proxy.

Step 5

Make sure your Internet browser does not block pop-up windows and has JavaScript and Java

enabled.

Step 6

Reset the device to its factory defaults, and try to access the LTE Device with the default IP

address. See Section 1.7 on page 6.

Step 7

If the problem continues, contact the network administrator or vendor, or try one of the

advanced suggestions.

----End

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Advanced Suggestions



Try to access the LTE Device using another service, such as Telnet. If you can access the

LTE Device, check the remote management settings and firewall rules to find out why the

LTE Device does not respond to HTTP.



If your computer is connected to the

WAN

port or is connected wirelessly, use a computer

that is connected to an

ETHERNET

port.

I can see the

Login

screen, but I cannot log in to the LTE Device.

Step 1

Make sure you have entered the user name and password correctly. The default user name is

admin

. These fields are case-sensitive, so make sure [Caps Lock] is not on.

Step 2

Step 3

You cannot log in to the web configurator while someone is using Telnet to access the LTE

Device. Log out of the LTE Device in the other session, or ask the person who is logged in to

log out.

Step 4

Turn the LTE Device off and on.

Step 5

If this does not work, you have to reset the device to its factory defaults. See Section 25.2 on

page 154.

----End

25.4 Internet Access

I cannot access the Internet.

Step 1

Check the hardware connections, and make sure the LEDs are behaving as expected. See the

Quick Start Guide and Section 1.6.

Step 2

Make sure you entered your service provider's LTE APN information correctly.

Step 3

If you are trying to access the Internet wirelessly, make sure the wireless settings in the wireless

client are the same as the settings in the AP.

Step 4

If you are trying to access the Internet wirelessly, make sure you have enabled the wireless

LAN by the WPS/WLAN button or the Network Setting > Wireless > General screen.

Step 5

Disconnect all the cables from your device, and follow the directions in the Quick Start Guide

again.

Step 6

If the problem continues, contact your ISP.

----End

I cannot access the Internet anymore. I had access to the Internet (with the LTE Device), but my

Internet connection is not available anymore.

Step 1

Check the hardware connections, and make sure the LEDs are behaving as expected. See the

Quick Start Guide and Section 1.6.

Step 2

Turn the LTE Device off and on.

Step 3

If the problem continues, contact your ISP.

----End

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The Internet connection is slow or intermittent.

Step 1

There might be a lot of traffic on the network. Look at the LEDs, and check Section 1.6. If the

LTE Device is sending or receiving a lot of information, try closing some programs that use the

Internet, especially peer-to-peer applications.

Step 2

Turn the LTE Device off and on.

Step 3

If the problem continues, contact the network administrator or vendor, or try one of the

advanced suggestions.

----End

Advanced Suggestions

Check the settings for QoS. If it is disabled, you might consider activating it. If it is enabled,

you might consider raising or lowering the priority for some applications.

25.5 Wireless Internet Access

What factors may cause intermittent or unstable wireless connection? How can I solve this

problem?

The following factors may cause interference:



Obstacles: walls, ceilings, furniture, and so on.



Building Materials: metal doors, aluminum studs.



Electrical devices: microwaves, monitors, electric motors, cordless phones, and other

wireless devices.



To optimize the speed and quality of your wireless connection, you can:



Move your wireless device closer to the AP if the signal strength is low.



Reduce wireless interference that may be caused by other wireless networks or

surrounding wireless electronics such as cordless phones.



Place the AP where there are minimum obstacles (such as walls and ceilings) between the

AP and the wireless client.



Reduce the number of wireless clients connecting to the same AP simultaneously, or add

additional APs if necessary.



Try closing some programs that use the Internet, especially peer-to-peer applications. If

the wireless client is sending or receiving a lot of information, it may have too many

programs open that use the Internet.

What wireless security modes does my LTE Device support?

Wireless security is vital to your network. It protects communications between wireless stations,

access points and the wired network.

The available security modes in your device are as follows:



WPA2-PSK:

(recommended) this uses a pre-shared key with the WPA2 standard.



WPA-PSK:

This has the device use either WPA-PSK or WPA2-PSK depending on which

security mode the wireless client uses.

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

WPA2:

WPA2 (IEEE 802.11i) is a wireless security standard that defines stronger

encryption, authentication and key management than WPA. It requires the use of a

RADIUS server and is mostly used in business networks.



WPA:

Wi-Fi Protected Access (WPA) is a subset of the IEEE 802.11i standard. It requires

the use of a RADIUS server and is mostly used in business networks.



WEP:

Wired Equivalent Privacy (WEP) encryption scrambles the data transmitted

between the wireless stations and the access points to keep network communications

private.

25.6 Phone Calls and VoIP

The telephone port won't work or the telephone lacks a dial tone.

Step 1

Check the telephone connection and telephone wire.

----End

I can access the Internet, but cannot make VoIP calls.

Step 1

The

PHONE

light should come on. Make sure that your telephone is connected to the PHONE

port.

Step 2

You can also check the VoIP status in the

System Info

screen.

Step 3

If the VoIP settings are correct, use speed dial to make peer-to-peer calls. If you can make a call

using speed dial, there may be something wrong with the SIP server, contact your VoIP service

provider.

----End

25.7 UPnP

When using UPnP and the LTE Device reboots, my computer cannot detect UPnP and refresh

My Network Places > Local Network.

Step 1

Disconnect the Ethernet cable from the LTE Device's LAN port or from your computer.

Step 2

Re-connect the Ethernet cable.

----End

The

Local Area Connection

icon for UPnP disappears in the screen. Restart your computer.

I cannot open special applications such as white board, file transfer and video when I use the

MSN messenger.

Step 1

Wait more than three minutes.

Step 2

Restart the applications.

----End

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