The Jabra 510 UC has an Omni Directional/noise filter microphone that enhances call clarity by eliminating background noise from the office. Digital Signal Processing (DSP) optimizes voice and music and suppresses echoes to aid the audio quality. Integrated A2DP allows for streaming media from a mobile device and effectively turns the 510 UC into a mobile audio speaker. A mute button lets you close off the audio with a touch.
The Plantronics Calisto 620 has a bi-directional microphones that activate in the direction of speaker’s voice. Dual auto-switching microphones limit the transmission of background noise and full duplex audio gives you 360° room coverage. Digital Signal Processing reduces drop-outs and suppresses echoes to aid the audio quality. Integrated A2DP allows for streaming media from a mobile device and effectively turns the Plantronics Calisto 620 into a mobile audio speaker. A mute button lets you close off the audio with a touch.
Verdict: Draw. Both speakerphones do a fine job of carrying audio.
The Jabra 510 UC is a round speaker whose base serves as a spool for the USB cable. Touch controls at strategic points around the perimeter of the speakers top allow you to control the audio, volume and mute functions.
The Plantronics Calisto 620 is a rounded square that looks unassuming as it sits on a table. The USB UC dongle sits in a garage at the bottom of the speaker. Physical buttons sit at strategic points on top of the speaker.
Verdict: Thanks to its physical buttons and unassuming square design the Plantronics Calisto 620 stands out as the winner.
Battery and Power:
The Jabra 510 UC offers up to 15 hours of talk time. The integrated USB cable allows you to charge the speaker using a wall adapter or powered USB port.
The Plantronics Calisto 620 offers up to 7 hours of wireless talk time and up to 5 days standby time. The internal battery is charge via a USB to microUSB cable plugged into a microUSB port on the side.
Verdict: Thanks to its 15 hours of talk time and the permanently connected USB charging cable the Jabra 510 UC is the winner.