Circut bending answering machine

trying to link my iphone 6 to an old answering machine. using the headphone jack of phone and adapting it to connect t to the rj11 telephone wire that inputs into the answering machine. has anyone tried this before or have any suggestions?

skimming through the wikipedia page for rj11 connectors it seems the two central pins (4+5) are tip and ring and the other connectors are used for aux connections (powering a light etc). strip the wire best you can and experiment with alligator clips between the pins and an audio jack until something works. good luck!