Information about using Poly phones with Dartmouth's phone system can be found online at https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0062214.
A basic overview of the phone itself is below.
For information on plugging in your phone, or plugging a headset or computer into your phone, see https://www.youtube.com/watch?v=LAIvvgOBiMM&list=PL1cRWWlpjGaPmYzzcF_b7Tt1rZDR8c5bh.
For complete information on your Poly desk phone, see https://support.polycom.com/content/dam/polycom-support/products/voice/business-ip-phones/user/en/vvx-ip-user-guide.pdf.
For information on commonly asked questions, see https://services.dartmouth.edu/TDClient/1806/Portal/KB/ArticleDet?ID=102301.