In order to comply with the code of practice for fire
alarm installations (as set out in BS5839), it is recommended
that the fire and intruder RedCARE connections are not
combined (unless the systems were specifically designed
to function under the standard for integrated systems
BS7807). Fire and intruder alarms systems require different
periods of stand-by battery back up. Dual linking may
lead to an insufficient battery back up on fire alarm
systems.
Telephone line constantly monitored