Using Ethernet Devices In A Wan; Using Cellular Modems In A Wireless Wan (Wwan) - Digi TX54 User Manual

Interfaces

Using Ethernet devices in a WAN

The TX54 device has four Ethernet devices, named ETH1, ETH2, ETH3, and ETH4. You can use these
Ethernet interfaces as a WAN when connecting to the Internet, through a device such as a cable
modem:
By default, the WAN/ETH1 Ethernet device is configured as a WAN, named WAN1, with both DHCP and
NAT enabled and using the External firewall zone. This means you should be able to connect to the
Internet by connecting the WAN/ETH1 Ethernet port to another device that already has an internet
connection.
The ETH2, ETH3, and ETH4 devices are by default configured as part of a bridge named LAN1 that is
used by the LAN1 interface, which uses the Internal firewall zone. If desired, you can assign these
Ethernet devices to a WAN.

Using cellular modems in a Wireless WAN (WWAN)

The TX54 supports either one or two cellular modems, depending on the model. The modems are
named:
Single-cellular models:
n
WWAN cellular modem or WWAN1 cellular modem
l
Dual-cellular models:
n
WWAN1 cellular modem
l
WWAN2 cellular modem.
l
These devices are included in one or two preconfigured Wireless WANs, WWAN or WWAN1, and
WWAN2.
Each cellular modem can have only one active SIM slot at any one time. For example, WWAN1 cellular
modem can have either SIM1 or SIM2 up at one time.
Typically, you configure SIM1 of the cellular modem as the primary cellular interface, and SIM2 as the
backup cellular interface. In this way, if the TX54 device cannot connect to the network using SIM1, it
automatically fails over to SIM2. TX54 devices automatically use the correct cellular module firmware
for each carrier when switching SIMs.
The dual-cellular variants of the TX54 device can have two cellular interfaces up at one time—one for
each modem. Typically, an administrator would route traffic to different destinations over a specific
cellular interface.
Configure cellular modems
Configuring the TX54's cellular modems involves configuring the following items:
Required configuration items
Enable the cellular modem.
n
Cellular modems are enabled by default.
Determine the SIM slot that will be used when connecting to the cellular network.
n
Configure the maximum number of interfaces that can use the modem.
n
TX54 User Guide
Wide Area Networks (WANs)
84