7.Remove the headset from the base and press the Call Control Button. The HEADSET button on the 2705 should light, and you should hear dial tone.
8.Make a test call. Verify that you can talk and listen on the headset. You may need to make adjustments to the speaking or listening volume as described in the Plantronics™ User Guide.
9.Press the Call Control Button again. The call should be disconnected.
10.Place a test call to the 2705 while wearing the headset. You should hear audible ringing indication on the headset.
11.Answer the call by pressing the Call Control Button. Verify talking and listening volume. Press the Call Control Button again to disconnect.
Handset Lifter Jack
AC Charging Jack
Telephone Cord Jack
Plantronics™ Headset Base
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