For how long should a battery backup for an emergency voice communications service operate under quiescent load?

The requirement for a battery backup to operate for 24 hours under quiescent load is based on ensuring the reliability and availability of emergency voice communications systems. In emergency situations, these systems need to be operational for extended periods, especially during outages or disasters, which may disrupt power supply.

A 24-hour backup ensures that the system can remain functional for a full day without external power, allowing for ongoing communication during critical incidents. This duration is standard in many regulatory frameworks, as it provides a balance between operational needs and the feasibility of battery technology. Moreover, a battery that supports this duration helps guarantee that the communications system is reliable when it is needed the most, particularly in areas prone to emergencies.