Corded headsets enable you to work freely while on a telephone call by freeing up your hands. They come in both monaural (one-ear) or binaural (two-ear) versions. Which one you choose is very much a personal preference. Binaural corded headsets provide better block out of general office noises, however, monaural corded headsets enable you to interact with others around you while you have your headset on.
Corded headsets are made up of two parts: the headset top and the bottom cable; both which connect via a QD (quick disconnect). A QD enables the headset user to walk away from their desk with the headset on, while still on a call. The bottom cable connects directly into your telephone but which bottom cable you require depends on the make and model of telephone that you use, since different telephones have different sockets. So when purchasing a corded headset, it’s always best to check a compatibility guide or contact your headset vendor to check which one you need.