Am I correct in thinking the T/H sensor is special and needs 6-core cable?
(Yes I know extending it is ill-advised, but I’ve seen plenty here do it)
Davis don’t seem to sell those anymore - can’t find them anywhere (or the one I found is 12m which is too long for the delicate sensor to handle).
Do you think this would suffice? https://www.amazon.co.uk/d/Telephones-VOIP-Accessories/Pin-RJ11-Telephone-Cable-3m/B0034ULKF2