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What makes the phone ring?

What makes the phone ring?
Harry Sands from Redcar and Cleveland (age 5-14)

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One Response

  1. The phone line that comes to your house has a special socket on the wall, there is only one socket like this per line and it’s the socket that can detect the ring. Within the socket is a circuit called the ringer circuit, this receives a signal through the cable which start’s the phone ringing. If there is a signal then the circuit ‘tells’ the phone to ring and it’s the phone that does the ringing.

    This socket is actually owned by BT and is the one that an engineer usually comes to see when he comes to your house. It can be a slightly different shape and size to the rest which makes it easy to spot.

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