Usb - Sierra Wireless AirLink ES440 User Manual

Field
Ephemeral Port
Starting Ephemeral Port
Ethernet 1 Link Setting
Rev 1 Nov.14
Description
Enable or Disable the Ephemeral Port feature
•
Disable—The source port in packets the AirLink device receives from a host device
and then sends out is not changed. The source port assigned to the packet when it
was created in the customer's host device is used. (default)
•
Enable—The AirLink device changes the source port on all outgoing NATed UDP
packets, using the range configured in the Starting Ephemeral Port field.
This field appears only when the Ephemeral Port field is set to Enable. It allows you to set
the starting port range used by a LAN host as the source port for over-the-air (OTA)
destinations using NAT.
Note: This field is intended for advanced users only. In most cases, use the default
value.
The NAT for the LAN host uses a range of 1000 ports as source ports for OTA
destinations beginning with the configured Ephemeral port. Options are:
•
1024 (default)–64535
If you have a network with multiple LAN hosts that are sending data to the same server
and the server is not receiving data from one (or more) of the hosts, it may be because
the Mobile Network Operator has a WAN firewall that is blocking the ports used by the
NAT for over-the-air (OTA) destinations. This field enables you to avoid the blocked ports
by changing the source port range used to send the data. For example, some users have
found that changing the starting port to 42000 has resolved the issue.
Note: The ephemeral port setting does not affect any outbound traffic initiated by the
device such as Events Reporting, Device Initiated AVMS connection, etc.
Configures the Ethernet port speed and duplex setting
Most of the time you can leave the default setting and the device you are connecting
automatically negotiates the speed and duplex setting with the AirLink device. However,
if the connected device has a fixed setting, use this field to change the AirLink device
setting to match that of the connected device. The options are:
•
Auto 100/10 (default)
•
Auto 10 Mb only
•
100 Mb Full Duplex
•
100 Mb Half Duplex
•
10 Mb Full Duplex
•
10 Mb Half Duplex
You can view the current speed and duplex setting on the Status > LAN page. See
page 58.

USB

The AirLink device is equipped with a USB port that increases the methods by
which you can send and receive data from a connected computer. You can set up
the USB port to work as either a virtual Ethernet port or a virtual serial port, or
you can disable it to prevent access by USB. A driver installation is required to
use the USB port in either mode.
By default, the port is set to work as a virtual Ethernet port.
LAN Configuration
103