Plantronics S11 Headset "phone check ac power" Questions

phone not the headset jack. Check the connection on the S11 to make sure the handset jack is where it is plugged into at. Here are a few suggestions from Plantronics if you are not getting a dial tone

check out from the user guide: 1) Callers cannot hear me, or I cannot hear caller/dialing tone.   The headset is not turned on or the headset is not connected to mobile phone. Press the call