AT&T U115, Install Manual, Page: 6 / 25

6
Figure 2: Basic Network Connectivity
Option a. Wired Ethernet Connection
Use a straight-through Ethernet cable (usually provided by your Broadband Internet Service Provider) to connect your
Internet broadband interface device to the Ethernet port labeled
WAN1 on the U115. The U115 should be connected
directly to the broadband interface device.
Dynamic Host Control Protocol (DHCP) is the default configuration for Internet IP addressing of the U115 Internet network
interface. If your device automatically obtains an address from your ISP through DHCP, it should auto-configure shortly
after powering up.
If your Broadband Internet Service Provider supplied you with a static IP address or PPPoE account information for use
with your broadband connection, you will need to perform additional
configuration of the primary interface through the
U115 web interface in order to establish Internet access and to retrieve device configuration. See
“
Configuring a Static
IP Address
” or “
Configuring PPPoE
” later in the guide.
Option b. Cellular Connection
Certain U115's will have an imbedded cell card and SIM already installed. If the device has an imbedded call card and
SIM, please work with your AT&T account team to activate the SIM.
If the device will connect via an approved cellular USB modem, then insert the modem into one of the two USB ports on
the back of the U115.
The U115 needs basic setup of the cellular modem via the web interface before it can connect to the Internet to retrieve its
configuration. See
“
Configuring an Always-On Cellular Connection
” or “
Configuring a User Controllable Dial as
Primary Configuration
” later in the guide. After a cellular connection is set up and connected the
GREEN ONLINE light
on the front panel will blink to indicate the U115 is using a cellular connection.