BT Telephone Socket

 Mastering Adaptor

Converts a BT etc extension

phone socket into a

Master Socket

A BT431A white plug to a BT 

socket with a capacitor

Easy to fit

No tools required

A must for all engineers

Keep some in your tool bag

If you have an old BT phone

without an inbuilt capacitor

that does not ring in an

extension socket

This adaptor will let it ring

Only  £2.50 inc Vat

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