Digi TX54 User Manual page 65

Interfaces
For WWANs, SIM switching (also enabled by default).
l
For WWANs, reset the modem.
l
Reboot the device.
l
The interval between connectivity tests.
n
The number of probe attempts before the WAN is considered to have failed.
n
The amount of time that the device should wait for a response to a probe attempt before
n
considering it to have failed.
If the type of probe test is:
n
Ping: Configure the number of bytes in the ping packet.
l
Interface status: Configure the amount of time that the interface is down before it is
l
considered to have failed, and the amount of time it takes to make an initial connection
before it is considered down.
Additional test targets.
n
If more than one test target is configured, determine whether the interface should fail over
n
based on the failure of one of the test targets, or all of the test targets.
Order of precedence for SureLink actions
If multiple SureLink actions, such as restarting the interface and rebooting the device, are enabled,
the following order of precedence is used:
1. Restart interface
2. Switch to the alternate SIM (for WWANs)
3. Reset the modem (for WWANs)
4. Reboot the device
For example, if SureLink is configured as follows:
Restart interface:
n
Enabled
l
Restart fail count: 2
l
Reset modem:
n
Enabled
l
Reset mode fail count: 3
l
Switch SIM:
n
Enabled
l
Switch SIM fail count: 5
l
Reboot device:
n
Enabled
l
Reboot fail count: 7
l
SureLink will: The device will:
1. First SureLink failure: Nothing will happen.
2. Second SureLink failure: The interface will restart.
3. Third SureLink failure: The modem will reset.
TX54 User Guide
Wide Area Networks (WANs)
65