WiLAS - Design & Operation

Designing your WiLAS System:

1 - Determining the model, you need

comes in two basic models:

(a) WiLAS 'System 3' 3 Siren (standard 3 tone voice-over) model 
- 2x alert tones, with Evacuation & Lockdown as the 2 standard tones
- 1x All Clear tone

(b) - WiLAS 'System 4' 4 Siren (custom tone voice-over) model 
- 3x alert tones, with Evacuation, Lockdown and 'Custom' , or 3 Custom tones/voice-overs
- 1x All Clear tone

Determine the alert tones you require, to determine the model needed.

2 - Determing number and location of sirens

A typical WiLAS System comprises several self-contained wirelessly networked  Siren Stations. The number of sirens depends solely on site specific issues such as:

- size and number of buildings, or open areas to be covered
- distance between buildings
- availability of 240VAC (or optional 110VDC) mains power
- background (ambient) noise
- where pesonnel are located

As a guide, using satellite maps (eg from Google Maps or Google Earth), areial photos, or 'to scale' site plans, in conjunction with a site audit, will easily allow you to determine where you wish to place sirens for best effect. As the inter-siren wireless range will almost invariably exceed the requirements of most customers, inter-siren wireless range is not generally a limiting factor, rather where you wish to place, or can actually physically place, sirens will determine the number of sirens you need.

Each station has dual siren horns attached that can be directed as required, or even spread out (eg up to 10 metres apart)

Once installed, every Siren Station automatically becomes part of the secure premises network. Once any one siren is activated, it repeats the selected activation signal to every other siren over the wireless network. It's that simple.

Emergency Alert Systems staff can help with your initial design, but the site installer can optimise the design through trial and error by relocating sirens if required. As with any wireless system, site specific issues such as building location, construction material, position of trees and other vegetation can affect performance, so this initial process will help resolve these issues. Because the Siren Stations are shipped fully charged, they can be placed around your site and trialled for best position, before they are then fixed in their final location.

3 - Determining number and type of wireless remote controls

WiLAS is activated using wireless controls.

The standard activation system is a handheld remote control (3 button is standard, 4 button optional, depending on model selected).

Two options exist in addition to the wirleess remote controls:

A - A wall mounted (battery powered) remote control panel, and

B - A Siren Control Station mounted (mains, battery or solar powered) remote control panel

4 - Determining need for Flashing Beacons

Based on the needs of site personnel (eg if there are hearing impaired personnel on site), and whether there is ambient noise that may make the sirens hard to hear (eg in a factory with heavy machinery operating, where factory staff where acoustic dampening headphones or earplugs), will determine the need for these supplementary visual alert devices.

Operating your WiLAS System:

1 - Network security

WiLAS uses a 'keyed' encryption system, in the same way a WiFi network does. A unique security code is programmed into every Siren Station (and optional Beacon Station) and every Remote Control handset, when you order your system. It means your system's activation system is unique and resistant to interference from other remote control devices.

Because of this security feature, two or more WiLAS networks could be co-located, or located close together (for example, systems installed in adjacent Primary and Secondary schools, or adjacent commercial premises) without interfering with each other.

2 - Network licences

NO RADIO LICENCE is required for your WiLAS System. This is because the wireless network operates in the 433MHz range (ie the lower end of the UHF spectrum), no licence is required. It is also generally a low power bandwidth, so is not likely to experience interference from other UHF radio systems.

3 - Activation

Simply press the required alert tone on your handheld or wall mounted remote control. Within seconds, every siren (and optional flashing beacon) will be set off. Even on large sites with many sirens, the activation signal is propogated in seconds.

Every system includes both Operator Remote Controls (three supplied as standard with every system purchased) and one (x1) Master Remote Control. The Master is used to program additional Siren Stations, Beacon Stations or Remote Controls installed at any time in the future. The Master Remote should be kept in a secure location. If lost, we keep secure records of the encryption key used for your system.

Upgrading your WiLAS System:

Simply add extra sirens, beacons, remote controls - even wireless repeaters to extend inter-siren distances  - as required. All you need to do is program them with the same security key as the master remote control. The same security coding system prevents hacking and activation/deactivation by unauthorised users allows you to quickly and easily add alert devices to an installed network.

WiLAS is designed to not only be easy to install and operate. Here is a quick overview of how to implement  a WiLAS System for your workplace.


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Emergency Alert Systems: innovative, wirelessly-controlled Alert Siren & Beacon Solutions