US Robotics USR3520 User Manual page 30

Only upon traffic

By default, the device is always connected to the network and can send and receive data in both
directions: Internet to gateway, and gateway to Internet. To protect the device from unauthorized
access and ensure you only pay for the data you want to send, you can configure the device to
connect only when it has data to transmit.

Set to Yes to connect the device to the WWAN when it has data to send and disconnect it
immediately after. Note that when the device is disconnected, it is also unable to receive data.
USRobotics recommends enabling this feature only if you are interested in one way, gateway-to-
Internet data flow.

Set to No (default) to disable sending data only upon traffic.
IMPORTANT: Remote login to the gateway does not work when Only upon traffic is enabled.
Connect while on international roaming

Manages international roaming settings for a device installed in a vehicle.

If set to Yes, international roaming is enabled.

If set to No, international roaming is disabled. USRobotics recommends disabling this feature to
prevent high roaming costs.
IMPORTANT: National roaming is always allowed on the gateway. The Connect while on roaming
feature only has an impact on international roaming behavior.
WWAN Div Antenna present

Enables antenna diversity.

The base unit supports two antenna interfaces: WWAN with Diversity/GPS and WWAN Main. Using
both antennas ensures better reception in low coverage areas and increased throughput.

If set to Yes, antenna diversity is enabled and both physical antennas must be installed.

If set to No, make sure only one antenna is connected to WWAN Main on the front panel.
IMPORTANT: Installing one antenna with diversity enabled (set to Yes), results in poor or unstable
performance. Make sure that diversity is disabled when there is only one antenna installed.
WWAN Passthrough Mode

By default, Passthrough Mode is disabled (set to No).

If set to Yes, the connected laptop receives an IP address from the wireless operator through the
gateway.
IMPORTANT: When pass-through is active, data send to port 80 will always redirect to the WebGui of
the gateway!
Revision: 1.00 Copyright 2015 U.S. Robotics Corporation 30 | P a g e