Rj11 to 3.5mm adaptor

[phoneuser43]

I have a Polycom phone with a 4-wire rj11 headset jack in the back, and a standard headphone with a 3.5 mm stereo plug. Where can I buy an adapter cable 3with the appropriate connections?

 

[JAYDEEJOHN]

Not sure if they make this combo, but try here
http/www.ramelectronics.net/audio-video/a-v-switchers/digital-audio-switcher/c10000-c18000-c18007.html?sorter=productname-en-asc
Also, try radio shack