WESTCables is offering In Line Phone Coupler RJ11 at very good price. Which is mostly used for gathering cables of phone lines or for distribution of lines, fits all standards modular phones. Instructions: Snap modular plug from phone into one end of modular coupler. Insert modular plug from wall into opposite side of coupler. To remove either modular plug, depress clip and pull. Important: can not be used between phone base and Handset Receiver.