Activate a lockdown / message from a telephone handset
Once connected to your phone line, the ringer relay switch can be used to activate an external siren, buzzer, bell, light, etc.
£110.00
Activate a lockdown / message from a telephone handset
Once connected to your phone line, the ringer relay switch can be used to activate an external siren, buzzer, bell, light, etc.
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Schools & Academies
Activation Methods
Activation Methods
Door Intercom
School PA Systems
Activation Methods
Activation Methods