This is a BT telephone adapter RJ11 to UK socket with short stub lead cable.
BT telephone 4-Wire adapter RJ11 to UK socket with short stub lead cable.
RJ11 male plug to BT female socket adapter.
Connections: RJ11 male plug - BT female socket.
Standard 4-Wire connection.
Compatible with all telephone systems using standard BT and RJ11 sockets.
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