Ajax HomeSiren Fibra White Wired Indoor Alarm Siren

Ajax HomeSiren Fibra White Wired Indoor Alarm Siren

The Ajax HomeSiren Fibra in white is a hardwired indoor siren built for the Ajax Fibra ecosystem, combining the dependability of a cabled connection with the fast, encrypted communication of the Fibra protocol. Designed to work exclusively with Ajax Hub Hybrid (2G) and Hub Hybrid (4G) control panels, it delivers instant audible and visual alerts whenever a connected detector is triggered, making it a solid choice for homes, apartments, offices, and small commercial sites that need a discreet yet powerful internal sounder.

Key Features

• Loud alarm output - produces an adjustable sound level between roughly 81 and 105 dB, strong enough to startle intruders and alert occupants.
• Fast response - reacts to tamper and intrusion alarms in under a second thanks to the two-way wired Fibra protocol.
• Configurable sound duration - alarm length can be set anywhere from 3 seconds up to 3 minutes via the Ajax app.
• Built-in and external LED indication - status LED shows arm/disarm state, entry/exit delay countdowns, and security mode changes, with support for connecting an additional external LED.
• Long cable runs - supports connection distances of up to 2,000 metres when wired with standard U/UTP cat.5 twisted pair cable.
• Encrypted, tamper-resistant link - Fibra technology uses session verification and anti-sabotage safeguards to prevent line tampering or signal spoofing.
• Robust enclosure - the reinforced housing and protected buzzer make an active siren difficult to silence or remove.
• Selective activation - installers can choose exactly which detectors trigger the siren, reducing nuisance alarms.
• Clean white finish - a neutral, minimalist design that blends into most interior wall colours.

Where It Fits

This siren suits indoor security installations where a wired connection is preferred for reliability, such as retrofits with existing cabling, commercial premises, or larger residential properties where wireless range could be a concern. It pairs with door/window contacts, motion detectors, and other Ajax devices on a Hub Hybrid system to provide clear on-site warning of intrusion, while its LED and beep indications also help end users manage day-to-day arming and disarming.

What's in the Box

• HomeSiren Fibra (white) siren unit
• SmartBracket mounting panel
• Installation kit (screws and fittings)
• Quick start guide

Frequently Asked Questions

Which hubs is this siren compatible with?
It is designed to connect only to Ajax Hub Hybrid (2G) and Hub Hybrid (4G) panels; it does not connect to other hubs or range extenders.

Can it be installed outdoors?
No, this siren is built for indoor installation only; using it outdoors can cause malfunctions or false alarms.

Does it need a battery?
No, it draws power directly from the hub wiring line, so there is no battery to replace.