1403-04: High Voltage Message Waiting Lamp for Single Line Set [System: > Class of Service: > SLTs: > SLTs(1403):

Use this option to enable or disable High Voltage Message Waiting for single line ports. High Voltage Message Waiting is not available in DSX-40. If both this option and 1403-05: FSK Message Waiting Lamp for Single Line Set are enabled, the system uses FSK Message Waiting.

1403-04: High Voltage Message Waiting Lamp for Single Line Set [System: Class of Service: SLTs: SLTs(1403): HiVolt Msg Waiting Lamp]