Calisto P540 - Phone PLANTRONICS - Free user manual and instructions
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| Product Type | USB Speakerphone |
| Brand | Plantronics |
| Model | Calisto P540 |
| Connectivity | USB (USB-A) |
| Power Source | Bus-powered via USB (5V, 500mA) |
| Dimensions (approx) | 131 x 67 x 33 mm |
| Weight | 140 g |
| Audio Technology | Full-duplex, echo cancellation, noise reduction |
| Speaker | Wideband speaker with frequency response 200-7500 Hz |
| Microphone | Omnidirectional with digital signal processing |
| Controls | Volume up/down, mute, call answer/end, three-way conferencing button |
| LED Indicators | Mute (red), call active (blue) |
| Compatibility | Windows 7/8/10, Mac OS X 10.6+, Chromebook, select UC platforms |
| Cable Length | 1.5 m (4.9 ft) |
| Certifications | Skype for Business, Cisco, Avaya, etc. |
| Warranty | 2 years limited |
| Package Contents | Calisto P540 speakerphone, USB cable, quick start guide |
| Additional Features | Three-way calling, mute reminder, dynamic equalization |
Frequently Asked Questions - Calisto P540 PLANTRONICS
How do I set up the Plantronics Calisto P540?
Plug the USB cable into your computer's USB port. The device is automatically detected and installed. No additional drivers are needed for most operating systems. Ensure your softphone application selects the Calisto P540 as the audio device.
How do I mute the microphone?
Press the mute button (located on the front panel, indicated by a microphone icon). The light turns red when muted. Press again to unmute.
Why is there echo during calls?
The Calisto P540 has built-in echo cancellation. However, ensure your computer volume is not too high and that you are not too close to the speaker. Also, avoid using speakerphones in large, echo-prone rooms.
Can I use the Calisto P540 with my mobile phone?
No, the Calisto P540 is a wired USB speakerphone designed for computers and laptops. It does not have Bluetooth or analog connectivity for mobile phones.
How do I adjust the volume?
Use the volume up/down buttons on the top of the device. You can also adjust the volume from your computer's system settings or the softphone application.
Does it work with all video conferencing apps?
Yes, the Calisto P540 works with most UC platforms such as Skype, Zoom, Microsoft Teams, Cisco Webex, and others. It is optimized for Skype for Business.
What is the three-way conferencing feature?
Press the conference button (sometimes labeled 'CF') to put the current call on hold, dial a second number, then press the conference button again to merge all parties into a three-way call.
Why is my microphone not working?
Check that the device is properly connected and selected as the default recording device in your computer's sound settings. Unmute if the red light is on. Also, test with another application or computer.
Can I use this with a desktop phone?
No, the Calisto P540 is designed for computer-based telephony (softphones) via USB. It does not have an analog phone jack.
How do I clean the device?
Use a soft, dry cloth to clean the exterior. Do not use any liquids or abrasive cleaners. Keep the microphone and speaker grilles free of dust.
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