The main base is the central communication for all the handsets, if your main base station is faulty none of your handsets will work.
BT Advanced Z Cordless DECT Phone Additional Replacement Handset Add On 090647
BT Advanced Z Cordless DECT Phone Replacement Handset Spares 090647 No Base Unit
BT Advanced Phone Z Additional Handset BT Advanced Z Handset with Batteries
BT Advanced Z or Advanced Phone Replacement Handset (Handset Only)
