Remote Connections; Radio Band Selection; Low Voltage Standby Mode - Sierra Wireless AirLink RV50 Series User Manual

Rev 1 Dec. 17
Note: Be careful when entering the PUK. You have a limited number of attempts to enter
the correct PUK (generally 10) before the SIM card is permanently disabled and a new SIM
card is required. If the PUK does not unblock the SIM card after the first few attempts,
contact your Mobile Network Operator.

Remote connections

I cannot connect to the AirLink gateway remotely over the Mobile
Network Operator's Private Network via the Web UI, although I can
connect to it locally.
Some Mobile Network Operators' private networks have restrictions on the
maximum transmission unit (MTU) size. This is more prevalent with LTE networks.
Possible solutions:
• Use your Mobile Network Operator's public network.
• Ask your Mobile Network Operator to reduce the MTU size on the router or
other equipment at their end of the private network. Setting the MTU value
below 1500 bytes (for example 1326 bytes) has resolved the problem on
some private networks.

Radio Band Selection

I set the radio band in the UI (WAN/Cellular > Setting the Band) or by
using the AT!BAND AT command, but after I reboot the band setting
reverts to its former value.
For some SIM cards, you need to set the band before inserting the SIM card.
To resolve this problem:
1. Remove the SIM card.
2. Set the band to the desired value.
3. Reboot the device.
4. Insert the SIM card.

Low Voltage Standby Mode

How do I get my gateway out of Low Voltage Standby mode?
The problem: While configuring Low Voltage Standby mode, I inadvertently set
the Resume Immediately Voltage too high (i.e. higher than the voltage available
where the gateway is installed). Now the gateway is stuck in standby mode.
I connected the gateway to a higher voltage source, and it resumed normal
operation. I reset the Low Voltage Standby values, but the gateway returned to
Standby mode as soon as it was reconnected to the lower voltage source, even
though the lower voltage source provided a higher voltage than the new value I
just set in the Resume immediately at Voltage field.
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Q & A and Troubleshooting
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