Using Cellular Modems In A Wireless Wan (Wwan) - Digi Connect IT 4 User Manual

Interfaces
By default, the WAN Ethernet device is configured as a WAN, named WAN, 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 Ethernet port to another device that already has an internet
connection.
The ETH2 device is configured as a LAN interface, named LAN, which uses the Internal firewall zone.

Using cellular modems in a Wireless WAN (WWAN)

The Connect IT 4 supports one cellular modem, named Modem, which is included in a preconfigured
Wireless WAN, also named Modem.
The cellular modem can have only one active SIM slot at any one time. For example, 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 Connect IT 4 device cannot connect to the network using
SIM1, it automatically fails over to SIM2. Connect IT 4 devices automatically use the correct cellular
module firmware for each carrier when switching SIMs.
Configure cellular modem
Configuring the Connect IT 4's cellular modem involves configuring the following items:
Required configuration items
Enable the cellular modem.
n
The cellular modem is 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
Enable carrier switching, which allows the modem to automatically match the carrier for the
n
active SIM.
Carrier switching is enabled by default.
Configure the access technology.
n
Determine which cellular antennas to use.
n
Additional configuration items
If Active SIM slot is set to Any, determine the preferred SIM slot.
n
In the event of a failover to a non-preferred SIM, or if manual SIM switching is used to switch to
a non-preferred SIM, the modem will attempt to reconnect to the SIM in the preferred SIM slot.
To configure the modem:

Web
1. Log into Digi Remote Manager, or log into the local Web UI as a user with full Admin access
rights.
2. Access the device configuration:
Remote Manager:
Digi Connect IT® 4 User Guide
Wide Area Networks (WANs)
102