Netgear LB1120 User Manual - Page 87

•

Turn off and on both the modem and the device that is connected to the modem.

•

If your modem’s IP address was changed and you do not know the current IP address, clear the modem’s

configuration to factory defaults.This sets the modem’s IP address to 192.168.5.1. For more information,

see

Return the Modem to Its Factory Default Settings

on page 59.

Troubleshoot the Mobile Broadband Internet Connection

If your modem cannot access the Internet, check the mobile broadband connection:

•

Make sure that a micro SIM card is installed in the modem. Micro SIM cards from other devices do not

function in the modem and this SIM card does not function in other devices. For information about

inserting the SIM cards, see

Install the Micro SIM Card

on page 8.

•

If SIM security is enabled, make sure that you entered the PIN correctly to unlock the SIM card (see

Enter the SIM PIN to Enable the Modem to Connect to the Internet

on page 50). A locked SIM card

prevents the modem from connecting to the mobile broadband network.

•

Make sure that your mobile broadband account is active.

•

Check with your Internet service provider to ensure that coverage exists in the area. If no mobile

broadband coverage exists, all Signal Strength bars are off.

•

If only one or two Signal Quality LED bars light, move the modem closer to a window for better access

to the mobile broadband signal.

•

Check to see if your mobile service provider is experiencing network problems. It might not be that the

modem cannot connect to the Internet, but rather that your service provider cannot provide an Internet

connection.

•

You might need to add a custom APN profile (see

Manage APN Profiles for Mobile Broadband

Connections

on page 31). Contact your mobile broadband service provider.

For more information about Internet connection problems, see

TCP/IP Network Not Responding

on page

88.

Obtain an Internet IP Address From Your Service Provider

If your modem cannot access the Internet but one or more Signal Strength LED bars light green, see if the

modem can obtain an Internet IP address from the mobile broadband service provider.

Unless the modem was assigned a static IP address, the modem requests an IP address from the mobile

broadband service provider.You can determine whether the request was successful (see

View Account

Details and Other Details About Your Modem

on page 65).

If the IP address is shown as 0.0.0.0, the modem did not obtain an IP address from the mobile broadband

service provider. If this situation occurs, do the following:

•

Make sure that an APN profile exists for your mobile broadband service provider (see

Manage APN

Profiles for Mobile Broadband Connections

on page 31).

•

Turn off the modem and then turn it back on.

If you still cannot obtain an Internet IP address, contact your mobile broadband service provider.

Alerts and Troubleshooting

87

LTE Modem LB1120 and LB1121

Section	Page
Contents	3
1. Introduction and Hardware Overview	6
Introduction	7
Supported Mobile Broadband Bands	7
Package Contents	8
Install the Micro SIM Card	8
Top Panel With Status LEDs	11
Back Panel With Connectors, Buttons, and a Port	12
Modem Label	12
Position the Modem	13
Optional External Antenna	14
2. Get Started	15
Internet Connection Over Mobile Broadband	16
Connect a Computer, Switch, Hub, Router, or WiFi Router to the Modem	16
Connect a Computer to the LAN Port of the Modem	17
Connect a Router or WiFi Router to the LAN Port of the Modem	17
Access the Modem’s Web Pages for the First Time	17
Change the Language	19
3. Manage the Modem LAN Settings	20
Change the LAN Settings	21
Manage Router Mode and Bridge Mode	23
Change the DHCP Server Settings	24
Disable the DHCP Server	26
Enable the DMZ	27
Disable VPN Pass-Through	28
4. Manage the Mobile Broadband Connection	29
Manage Mobile Broadband Auto Connect Options	30
Manually Connect to or Disconnect From the Mobile Broadband Network	31
Manage APN Profiles for Mobile Broadband Connections	31
View APN Profiles or Add a Custom APN Profile	32
Select an APN Profile	34
Change an APN Profile	35
Remove an APN Profile	36
5. Secure Your Network	37
Change the Modem Password	38
Manage Port Forwarding for Incoming Traffic	38
Enable Port Forwarding and Add a Service or Application	39
Remove a Service or Application for Port Forwarding	40
Disable Port Forwarding	41
Manage Port Filtering for Outgoing Traffic	42
Block Specific Services and Applications From Accessing the Internet and Allow All Other Services and Applications	42
Allow Specific Services and Applications to Access the Internet and Block All Other Services and Applications	44
View Services and Applications on the Blacklist and Remove a Service or Application From the List	45
View Services and Applications on the Whitelist and Remove a Service or Application From the List	46
Disable Port Filtering	47
Manage SIM Card Security	48
Enable SIM Card Security	48
Enter the SIM PIN to Enable the Modem to Connect to the Internet	50
Personalize the SIM PIN	51
Disable SIM Card Security	52
Unblock the SIM Card With a PUK	54
6. Manage the Modem and Monitor Usage and the Network	56
Upgrade the Firmware of the Modem	57
Back Up and Restore the Modem Settings	58
Back Up the Settings	58
Restore the Settings	59
Return the Modem to Its Factory Default Settings	59
Use the Reset Button	60
Use the Modem’s Web Pages to Reset the Modem to Factory Defaults	60
View Monthly Data and Session Data Usage	61
Set a Plan Limit for the Data Counter	62
Change the Billing Cycle Counter or Reset the Data Counter	63
View Service Provider, Type of Service, and Signal Strength	63
View Account Details and Other Details About Your Modem	65
View Information About the Mobile Broadband Connection	66
Set Up SMS Alert Messages	67
Set the Data Limit for SMS Alert Messages	69
View Alerts	70
Turn Off the LEDs	71
7. Manage SMS Messages	72
Manage Incoming SMS Messages	73
Send an SMS Message	74
8. Frequently Asked Questions	75
What do I do when I can’t connect a device to the modem?	76
What do I do when I can’t access the Internet?	76
What do I do when the No Signal icon displays?	76
Why does the Signal Strength LED show only a few bars?	76
Why is the download or upload speed slow?	76
Can I connect multiple LAN devices to the modem?	77
How do I access the modem’s web pages?	77
What do I do if I forget my admin login password?	77
How do I disconnect from the mobile broadband network?	77
How do I find my computer’s IP address?	78
How do I find a device’s MAC address?	79
How do I find my mobile phone number?	81
Where can I find more information?	81
9. Alerts and Troubleshooting	82
Alert Messages	83
Quick Tips for Troubleshooting	83
Verify Normal Behavior With the LED Bars	84
Troubleshoot With the LED Bars	84
Power LED Bar Is Off	85
Power LED Bar Blinks Amber Fast and an Individual Signal and Strength LED Bar Lights Solid Green	85
LAN LED Is Off	86
You Cannot Log In to the Modem	86
Troubleshoot the Mobile Broadband Internet Connection	87
Obtain an Internet IP Address From Your Service Provider	87
Troubleshoot Internet Browsing	88
Changes Not Saved on the Modem’s Web Pages	88
TCP/IP Network Not Responding	88
Test the LAN Path to Your Modem	88
Test the Path From Your Computer to a Remote Device	89
A. Default Settings and Specifications	90
Factory Default Settings	91
Technical and Environmental Specifications	92
B. Wall-Mount the Modem	93
Position Your Modem	94

Netgear LB1120 User Manual - Page 87

Troubleshoot the Mobile Broadband Internet Connection

Page 87 highlights