Two-Way Communication Systems
Underwriters Lab (UL) Code
UL 2525 Standard Code
- 32.1.3 Emergency, supervisory, and trouble signals shall be annunciated at the Master Control Unit.
- 32.1.4 The rescue assistance system shall have the capability of signaling emergency and trouble conditions to a fire alarm system and/or other equipment.
- 33.2.1 Failure of any component in the audio chain resulting in the loss of emergency signaling capability shall cause an audible trouble signal. Compliance is to be verified with the two-way emergency communication system in the normal condition and repeated with the system in the emergency condition.
UL® 1069 Standard Code
32.1.3
Emergency, supervisory, and trouble signals shall be annunciated at the Master Control Unit.
32.1.4
The rescue assistance system shall have the capability of signaling emergency and trouble conditions to a fire alarm system and/or other equipment.
33.2.1
Failure of any component in the audio chain resulting in the loss of emergency signaling capability shall cause an audible trouble signal. Compliance is to be verified with the two-way emergency communication system in the normal condition and repeated with the system in the emergency condition.
UL 2560
32.1.3
Emergency, supervisory, and trouble signals shall be annunciated at the Master Control Unit.
32.1.4
The rescue assistance system shall have the capability of signaling emergency and trouble conditions to a fire alarm system and/or other equipment.
33.2.1
Failure of any component in the audio chain resulting in the loss of emergency signaling capability shall cause an audible trouble signal. Compliance is to be verified with the two-way emergency communication system in the normal condition and repeated with the system in the emergency condition.
Standards compliance
