AT&T U120 Install Manual
  1. Manuals
  2. Brands
  3. AT&T Manuals
  4. Modem
  5. U120
  6. Install manual
AT&T U120 Install Manual

AT&T U120 Install Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
AT&T U120 Install Guide
Version D6.0.1
1

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the U120 and is the answer not in the manual?

Questions and answers

Related Manuals for AT&T U120

Summary of Contents for AT&T U120

  • Page 1 AT&T U120 Install Guide Version D6.0.1...
  • Page 2 © 2023 AT&T Intellectual Property. All rights reserved. AT&T, the AT&T logo and all other AT&T marks contained herein are trademarks of AT&T Intellectual Property and/or AT&T affiliated companies. All other marks contained herein are the property of their respective owners. CALIFORNIA PROPOSITION 65 WARNING WARNING: Cancer and Reproductive Harm –...
  • Page 3 ‫במוצר‬ " • • • ‫המוצר‬ • ‫המוצר‬ • ‫במוצר‬ • ‫המוצר‬ • • • ‫המוצר‬ • • • • Class A ‫היבואן‬ ‫איי טי אנד טי גלובל נטוורק סרויסס אינטרנשיונל‬ 05107 ‫רחוב הנגב 4, קריית שדה התעופה, לוד‬ naveeD : "...

  • Page 4: Table Of Contents

    LAN Port Configuration ..................................... 24 VLANS ........................................24 WiFi on Local LAN ....................................28 AT&T U120 Hardware / Signal Overview ..............................29 Front Panel Indicators, Switches & Slots ..............................29 Special Cases ......................................29 Rear Panel Ports & Connectors ................................30...

  • Page 5: Installing The U120

    This should occur within the first 2-3 minutes after initial power on. Wait for a steady GREEN ONLINE light on the front panel to indicate the U120 is ready for use.

  • Page 6: Option C. Wifi Connection

    AT&T account team to activate the SIM. The U120 needs basic setup of the cellular modem via the web interface before it can connect to the Internet to retrieve its configuration. See “ ” later in the guide. After a cellular connection is set up and Configuring a Cellular Connection connected the GREEN ONLINE light on the front panel will blink to indicate the U120 is using a cellular connection.

  • Page 7: Step 2: Establish Local Network Connectivity

    Step 2: Establish Local Network Connectivity In most cases, your devices will attach directly to the U120 via one of the 8 LAN ports with an Ethernet cable. The LAN configuration of the U120 is controlled by your IS Department and is not configurable by any user.

  • Page 8: Configuring The U120 Internet Connectivity

    Access the U120 Web Interface The U120 web interface can be accessed from a computer attached to a LAN port. The web interface can be used to access various administration functions and can allow the VPN connection to be controlled.

  • Page 9: Primary Ipv4 Wan Interface Setup

    Primary IPv4 WAN Interface Setup To configure the primary interface for something other than DHCP (or to change DHCP settings), follow these steps: 1. Access the web interface as described on page 8. 2. Click the entry for Network Settings to display the Network Settings sub-menu and click the entry for WAN Setup Figure 2: Network Settings Selection as shown in Figure 2: Network Settings Selection...

  • Page 10: Configuring Dhcp

    Configuring DHCP Figure 3: DHCP Settings To configure DHCP, follow these steps after reaching 1. Select “DHCP” from the choices that are displayed. Figure 3: DHCP Settings 2. Check the checkboxes for the DHCP options required by your ISP in .

  • Page 11: Configuring A Static Ip Address

    Configuring a Static IP Address Figure 4: Static IP Settings To configure a static IP address, follow these steps after reaching 1. Select “Static” from the choices that are displayed. Figure 4: Static IP Settings. 2. Enter the Static IP information requested on Fields that are marked with an asterisk are required and must be populated.

  • Page 12: Configuring Ip Unnumbered

    Configuring IP Unnumbered Figure 5: IP Unnumbered Settings To configure IP Unnumbered, follow these steps after reaching 1. Select “IP Unnumbered” from the choices that are displayed. Figure 5: IP Unnumbered Settings 2. Enter the IP Unnumbered information requested on .

  • Page 13: Configuring Pppoe

    Configuring PPPoE Figure 6: PPPoE Settings To configure PPPoE Account information, follow these steps after reaching 1. Select “PPPoE” from the choices that are displayed. Figure 6: PPPoE Settings 2. Enter the information requested on . Fields that are marked with an asterisk are required and must be populated.

  • Page 14: Configuring A Cellular Connection

    To configure an Always-On Cellular connection, follow these steps after reaching 1. Ensure that a SIM has been inserted into the U120 SIM1 slot. The power should be turned off when the SIM is inserted. If you inserted the SIM when the power was on then turn the U120 off and back on again.
  • Page 15 Figure 7: Cell Settings Figure 8: Cellular Dial as Primary Settings - Modem Properties...

  • Page 16: Cellular Service Verification

    Cellular coverage can vary, even over a short distance, and a bad placement of the AT&T U120 can result in substandard or even non-existent cellular service. The signal strength will be displayed on the front panel, right side. If the LED labeled “LTE” is displaying blue then the SIM is active and the signal strength LEDs will display the signal strength.

  • Page 17: Wifi Wan Interface

    WiFi WAN Interface The U120 can be configured to use WiFi as the primary WAN interface. Configuring WiFi DHCP Figure 10: WiFi DHCP Setup To configure WiFi DHCP, follow these steps after reaching 1. Select “WiFi DHCP” from the choices that are displayed.
  • Page 18 Configuring WiFi Static Figure 11: WiFi To configure a WiFi Static IP address connection, follow these steps after reaching Static Configuration 1. Select “WiFi Static” from the choices that are displayed. Figure 11: WiFi Static Configuration 2. Enter the Static IP information requested on .
  • Page 19 Figure 11: WiFi Static Configuration...

  • Page 20: Administrator Access

    Administrator Access One or more users may be designated as administrators by your IS Department. If your U120 was set up for administrator Figure 12: Administration Panel access, is displayed and you must select your access level. You must be a designated administrator to configure or control the U120.

  • Page 21: Establishing Vpn Connectivity

    U120 follow these steps: 1. Open your web browser as described under “Access the U120 Web Interface” on page 8 and if necessary click on the tunnel name on the right to view the Login page. The form of the page will depend on the network and type of Figure 13: Example of Login Page for AT&T Managed...
  • Page 22 Figure 13: Example of Login Page for AT&T Managed...
  • Page 23 Figure 14: Example of Connected Page...

  • Page 24: Firewall Ports

    This should occur within the first 2-3 minutes after initial power on. You will not be able to view the VLAN configuration until the U120 has successfully retrieved its configuration.
  • Page 25 8. It may be necessary to reboot or reconfigure your devices attached to the U120 in order to obtain/assign a valid IP address if the IP addressing was changed when the U120 retrieved its VLAN configuration. Click the entry for Network Settings from the menu on the left to display the Network Settings sub-menu and click...
  • Page 26 Figure 15: Navigation to Local LAN Settings...
  • Page 27 Figure 16: VLAN DHCP Configuration...

  • Page 28: Wifi On Local Lan

    The U120 can be configured by your IS Department to support WiFi on the Local LAN. Your administrator will give you an SSID and shared secret/authentication credentials to connect to the U120. Figure 17: WiFi on Local LAN shows a device connected to the U120 via the WiFi Local LAN. Figure 17: WiFi on Local LAN...

  • Page 29: At&T U120 Hardware / Signal Overview

    AT&T U120 Hardware / Signal Overview Front Panel Indicators, Switches & Slots POWER Indicates power being delivered to the device. ONLINE SOLID: Indicates the device has connectivity to the Internet. FLASHING: Indicates the device has connectivity to the Internet over a backup connection.

  • Page 30: Rear Panel Ports & Connectors

    When the software upgrade is underway, the ONLINE, VPN, USB, WAN1, WAN2, SERIAL will cycle in an inward flashing pattern with the rightmost bank of lights off. CAT RESET - software When a catastrophic reset is initiated from the web interface, the POWER light will be on solid while ONLINE, VPN, USB, WAN1, WAN2, SERIAL cycle in an inward flashing pattern with the rightmost bank of lights off.

Table of Contents