Repetitive Electrical Impulse Noise (REIN)
REIN is repeated bursts of electrical interference, from sources such as faulty lights, power supplies or appliances, that disrupt DSL broadband.
What is Repetitive Electrical Impulse Noise (REIN)?
Related types are SHINE (single high-level impulse noise) and PEIN (prolonged electrical impulse noise). Finding and fixing the source usually means tracing the device.