I have just attached a Geemarc Windsor Model 1 to an extension socket but it does not ring., I have tested it on the main socket and first extension socket and it does . I have tested other phones on the extension sockets and they ring. It is the second extension on the line and the wiring is approximately 20 metres from the main line. I have not exceeded the REN rating which is 3 in total
Thank you for your answer. You say that my Geemarc phone might be marginally defective and it makes sense to use it on another extension. However, my mother bought it to "match the furniture" (it has a walnut effect) and does not want either of the other phones in its place! If it is defective is it dangerous to use?