AI and EAI for line devices can be activated as follows:
- All On
- All Off
- Only line devices with faults
- Only line devices at the ends of stubs
This can be useful when the system is being inspected. Applications include for instance searching for an open circuit on the line and testing whether all EAIs are connected.
Devices with an unconfigured sounder base can send an error message. See 'Configuring sounder bases'.