MOST DEVICES HAVE A REN OF 1. THIS ADAPTOR HAS A REN OF 0 SO DOES NOT REDUCE REN OF THE LINE. PLUG THE DOUBLE ADAPTOR INTO THE SOCKET.
Commtel Telephone Triple Adaptor
BT TELEPHONE DOUBLE ADAPTOR 2 WAY SPLITTER
PHILEX TELEPHONE DOUBLE ADAPTOR IN-LINE REWIREABLE IDC TERMINALS X2 *EL191/D34
Commtel Telephone Privacy Dual Adapter Adaptor Double Splitter
BT Telephone Adapter Two way Phone Socket DOUBLE Adaptor Splitter / Connector UK
BT TELEPHONE DOUBLE SOCKET ADAPTOR 2 WAY SPLITTER BREAK IN OUT
