Plantronics CS500 XD CS510/CS520 XD User Guide - Page 16

Battery This product has a replaceable battery. To ensure replacement batteries meet Plantronics high quality standards and for optimal performance, only use replacement batteries provided by Plantronics. Low Battery Warning If you are on a call and the headset battery is critically low, you will hear a repeated single low tone every 15 seconds indicating that the battery is low. You should recharge the headset immediately. If you are not on a call and press the call control button, you will hear three low tones if the battery is critically low. You should recharge the headset immediately. Muting Your Headset During a Call To mute/unmute the call, press the mute button. When mute is activated on the primary headset, the Call/mute LED on the base will be solid red and you will hear three high tones (you will still be able to hear the caller). Adjusting Your Headset Volume Fine-tune your headset volume by pressing the volume [+] button to increase or the volume [-] button to decrease. Make set up volume adjustments for the desk phone with the volume dials on the base. Out of Range Warning Tones If you are on a call and go out of the operating range, you will hear three low tones. You will hear a single mid tone when you are back in range. If you stay out of range, an active call will be suspended. The call will be re-established when you walk back into range. If you remain out of range for more than 5 minutes, the system will drop the call. If you are not on a call and go out of the operating range and then press the call control button, you will hear a single tone for the button press and three low tones for the failure to make a link. 16