Method and apparatus for verifying operation of notification appliances during low input voltage condition

A method for verifying installation of notification appliances on a notification appliance network, comprising:

• reducing an output voltage from a control panel to a level based on a low line condition, the output voltage being supplied to a network;
• measuring an input voltage at a notification appliance connected to the network;
• comparing the input voltage to a low input voltage threshold;
• and
• providing one of a pass indication and a fail indication based on the comparing step.

An alarm system, comprising:

• a control panel providing an output voltage to a network;
• a notification appliance communicating with the control panel over the network, the notification appliance including an alarm indicator and a control module configured to turn on/off the alarm indicator, the control module configured to receive command instructions from the control panel and to sample an input level, the control module directing operation of the alarm indicator based on the command instructions;
• and
• a fault indicator for indicating a relationship between the input level and a low line condition.