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What are REIN and SHINE?
Repetitive Electrical Impulse Noise (REIN) and Single Isolated Impulse Noise (SHINE) describe interference that can affect the stability and performance of a Broadband service. In both cases, a power source is generating interference in the frequencies used by the ADSL Broadband service.
REIN is where this interference is generated for the duration of use of an electrical device, and will typically result in disconnections or line errors while the device is in use. At its most extreme, REIN may prevent any connection being established at all.
SHINE is where this interference is generated as a burst – when a device is powered on or off, for example. As a result disconnections or line errors may result at the time a device is switched on or off.
What are the effects of REIN and
SHINE on my Broadband service?
In addition to the disconnections caused by REIN or SHINE you are likely to see a slower speed due to line errors and BT’s automated systems working to counteract the symptoms by restricting the maximum speed you can connect at. Lowering the speed creates a “buffer” to the interference, so it doesn’t cause your connection to drop.
So for those evening sessions that drop to zero or there-a-bouts, that are difficult to find, remember Openreach needed a Special Team and 18 months to solve that one.