Hi there!
It looks like you have the right cable and you have the Polycom phone on the correct setting, it should be working. I would recommend unplugging the AC power adapter and the EHS cord, then re-plug them both back in after 10 seconds. Also, try restarting your Polycom phone.
If neither of these steps work you could have a defective EHS cord. If that's the case and these were both ordered new, then you have a 1 year warranty from Jabra. Worst case scenario you might need to get a GN1000 with a Plantronics L bracket for remote answering.
Let me know If I can help with anything else.
Thank you,
-Drew Merritt
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