If your desk phone has a headset button and a RJ9 headset jack on the back, you can connect through there, here's how!

1. Plug the power adapter into the power port on the charging base.
2. Plug the included phone cord into the green telephone connector port on the back of the charging base.
3. Plug the other end of the phone cord into the headset jack on the back of your desk phone.
4. If you're using a Cisco phone, set your compatibility switch to 4. Otherwise, make sure it's set to 1.
5. Place your headset on the charging base (we recommend charging for at least 4 hours before first use).

Here's how to answer a telephone call and place a call.