SATO CL4NX Operator's Manual page 356

Level 4
Secure Simple Pairing compatible, service level, encryption (Can be communicated with devices
that are not compatible with Secure Simple Pairing)
[ISI]
Set the ISI communication parameter.
The setting range is from 18 to 4096.
Set to a value that is higher than the ISW communication parameter setting value.
[ISW]
Set the ISW communication parameter.
The setting range is 0, or from 17 to 4096.
The setting range varies depending on the ISI communication parameter setting value.
Set to a value that is less than the ISI communication parameter setting value.
356
[Bluetooth]