Plantronics Calisto 600 Calisto 620-M User guide - Page 17

Is there a visual indicator on the Calisto 620-M that shows volume level? No. There is no visual indication of volume level or volume adjustments on the Calisto 620-M. NOTE The Calisto 620-M has a mid-range default volume setting. It provides audible indications as you adjust the volume and when you have reached the maximum or minimum volume level. When I'm out of Calisto 620-M's Bluetooth range while on an active mobile phone call and then come back into Calisto 620-M Bluetooth range, Calisto 620-M does not auto-reconnect to the mobile phone/call (as it does with Voyager Pro UC). This is by design. When Bluetooth mobile headsets reconnect to a mobile phone when in-range, call privacy is not compromised because other people cannot hear the tiny speaker in the headset, but auto connecting on a speakerphone can compromise a private conversation if audio is played over its loud speaker unexpectedly. For this reason, it is necessary to reconnect manually to Calisto 620-M from the mobile phone UI, or, to do a 2 second key press on Calisto 620-M's Call Button to move the audio back to Calisto 620-M. This is for user conversation confidentiality. At times I hear some clicking/ • Bluetooth devices, like Calisto 620-M, can be susceptible to popping sounds while on a call with interference from Wi-Fi and/or other Bluetooth devices. Calisto 620-M, is this distortion or some sort of a product defect? • If you use Calisto 620-M near a Wi-Fi access point or in a Bluetooth-intensive environment, some interference can be experienced in the form of audible artifacts through Calisto 620- M's speaker. • If these artifacts are not present when using Calisto 620-M away from Wi-Fi and/or Bluetooth- intensive environments, then it is very likely the artifacts are caused by radio/RF interference. Music/media played on Calisto 620-M does not sound as good when streamed from the PC as it does when streamed for my mobile or smartphone. Why? The Calisto 620-M Bluetooth adapter supports wideband audio for both speech and media/music, so the fidelity is not as high as music/media streamed via A2DP from a mobile/smartphone side, which is Hi-Fi. What size room and how many There are 2 variables to consider for this answer, and both participants does Calisto 620-M involve the perceived audio quality experiencedby listeners on support for group conference calls? the other (far) end of a Calisto 620-M call: 1 The acoustic properties of the room: Not all rooms are created equal, and room acoustics can vary significantly. 2 The subjective opinion (or hearing abilities) of the far-end listener(s) which can also vary significantly With these variables considered, in general Calisto 620-M can be used in up to a 12x12 foot room with up to 6 participants. Can the USB power cable be used for audio-over-USB during calls? Can Calisto 620-M also function as a corded USB device? No. The USB cable is for power and Direct Firmware Updates (DFU) only. NOTE An accessory cable is available from Plantronics which emulates the corded experience; through a single USB port on the PC, this cable provides 1) a connection for the Minimax USB Bluetooth adapter and 2) a power connection to the speakerphone. (PN: 86215-02) 16