I have not had a telephone service call like this one before.
To start with, it seemed quite straight forward in needing to replace a faulty slave/extension socket in the master bedroom.
Next, the customer wanted me to take a look at their old GPO bell box. A bell box is a bit of kit that should ring loud and proud, independently from any phones that are plugged in. They think it was originally installed in 1969 and had recently stopped working.
After asking the customer for an ELASTIC BAND, it was again ringing away. Probably not the most ideal solution, and the unit will probably shut down completely at some point. But at least it gets to live another day.