Digi TransPort WR11 User Manual page 234

Configuring network interfaces
lost will power cycle the module after 5 minutes loss of GSM registration, and setting to reset
the module if GPRS registration is lost will power cycle the module after 5 minutes loss of
GPRS, 4G/LTE, 3G, or HSPA registration.
Preferred System
Controls which mobile technology is the preferred system (2G/3G).
When set to Auto, the cellular module chooses the fastest technology available.
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When set to GSM, the cellular module tries GSM (GPRS/EDGE) technology first.
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When set to WCDMA, the cellular module tries WCDMA (UMTS/HSPA) technology first.
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For CDMA: select CDMA for 2G (1xRTT) or EVDO for 3G.
When set to 4G/LTE, the cellular module tries 4G/LTE technology first.
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3. In the Mobile Network Settings section, enter the mobile network settings.:
Metric
The connected metric of the mobile interface. The default metric of a connected interface is 1.
By allowing the interface to have a higher value (lower priority), static routes can take
preference to interfaces. For normal operation, leave this value unchanged.
Generate Heartbeats on this interface
Heartbeat packets are UDP packets that contain status information about the router that you
can use to locate a remote unit's current dynamic IP address. When enabled, displays the
following parameters:
Send Heartbeat messages to IP address a.b.c.d every h hrs m mins s secs
If these parameters are set to a non-zero value, the router will transmit heartbeat packets to
the specified IP address/hostname at the specified interval.
Use interface x,y for the source IP address
Allows the selection of the source interface for the UDP heartbeats. For example, it may be
required to send the heartbeat packets down a VPN tunnel. And in order to match the
corresponding subnets of the VPN, it might require changing the source IP to match an inside
Ethernet interface.
For normal operation, using the mobile interface as the source IP address, leave this value
unchanged.
Select transmit interface using the routing table
When enabled, the UDP heartbeats chooses the best route from the routing table. If disabled
the exit interface will be interface on which the heartbeat is configured.
Digi TransPort® Routers User Guide
Configure mobile (cellular) interfaces
234