How does the Plantronics Headset Lifter work?

Q:  I am looking at Plantronics Headsets for my office phone.  How does the phone lifter work with 12 lines?  I presume I can hang up whatever line I’m on, but can’t pick up any of the 12 lines except at my phone, correct? A:  When you have a wireless headset with a handset lifter, … Continued