Plantronics 510S Service Guide - Page 4

STEP 2Connect Base to Desk Phone It is important for correct and safe operation that the base cord is installed into the proper jack of your telephone. Follow these instructions carefully, especially if your telephone has two jacks where the handset was attached. Be sure to note or mark which jack was used for the handset. Use Configuration A if: You will use the Automatic Handset Lifter or... Your phone does NOT have built-in headset functionality (no Headset button). Configuration A 1. Unplug the handset coil cord from the desk phone handset port [A], then plug it into the handset port [B] on the Headset Base. A Handset Coil Cord A Handset B Headset Base (bottom view)  Plantronics Voyager 510S Setup Guide 2. Plug the short black Phone Cable that is pre-installed on the Headset Base into the now-open handset port [A] on the desk phone.