Application Guide
PLANTRONICS AUDIO SOLUTIONS FOR ENTERPRISE SOFTPHONES
5
With a focus on clear, consistent, and reliable voice collaboration, Plantronics is dedicated to partnering with enterprises to provide superior 
audio devices for Unified Communications (UC) deployments. The Plantronics UC portfolio offers a broad range of solutions for diverse 
working styles, with high-quality audio and world-class technical support.
QUICK REFERENCE GUIDE
Blackwire 300 Series Blackwire 435 Blackwire 500 Series Blackwire 700 Series
Calisto 240
Calisto 600 Series
Connects to PC via USB
1
 + smartphone/tablet via 
3.5mm (C315/325)
PC via USB
1
PC via USB
1
PC via USB + mobile phone/tablet 
via Bluetooth (710/720); up to 10 
hours talk time (C710/720) 
PC via USB PC + mobile phone/tablet (P620) 
Recommended for Users transitioning to PC telephony Users requiring a portable PC 
headset
Users with extensive PC 
communication
Users with extensive PC audio 
and some mobile phone 
communications
PC/Mac telephony users 
transitioning to UC
Users on the go to transform 
any workspace into a conference 
room
Wearing style/usage Monaural, stereo Stereo/mono convertible  Monaural, stereo Monaural (C710), stereo (C720/
C725) 
Handset Wireless speakerphone (P620); 
Corded speakerphone (P610) 
Roaming range N/A N/A N/A Up to 33 feet (mobile) (C710/C720) N/A Up to 33 feet (P620); corded 
(P610)
Wireless frequency N/A N/A N/A Bluetooth® v2.1 + EDR (C710/C720) N/A Bluetooth v2.1 + EDR (P620)
Audio performance Immersive audio (C320/325), Dynamic 
EQ: wideband (voice), hi-fi stereo 
(C320/325 only); echo cancellation
Dynamic EQ: wideband (voice), 
hi-fi stereo; echo cancellation
Dynamic EQ: wideband (voice), 
hi-fi stereo (C520 only); echo 
cancellation
Immersive audio (C720 /725), 
Dynamic EQ: wideband (voice), 
hi-fi stereo (C720/725), A2DP 
(C710/720), active noise canceling 
technology (C725)
Wideband, echo cancellation, 
full duplex speakerphone
PC wideband, echo cancellation, 
A2DP (P620)
Hearing protection SoundGuard SoundGuard SoundGuard SoundGuard DIGITAL for PC 
(C710/720); SoundGuard (C725)
SoundGuard N/A
Microphone
noise reduction
Noise-canceling Noise-canceling Noise-canceling Noise-canceling Noise-canceling Noise reduction with 
bi-directional auto switching 
microphones (P620); 
omni-directional mic (P610)
Call control Call answer/end, mute,  
volume +/-
Call answer/end, mute,  
volume +/-
Call answer/end, mute,  
volume +/-
Call answer/end, mute, volume +/- Call answer/end, mute, 
volume +/-, dial pad
Call answer/end, mute, volume +/-
Talk time
3
N/A N/A N/A Up to 10 hours talk time (mobile) 
(C710/C720)
N/A Up to 7 hours (P620)
Limited warranty 2 years 2 years 2 years 2 years 1 year 2 years
Model number C310 (monaural, foam ear cushions); 
C315 (monaural, 3.5 mm, leatherette/ 
foldable ear cushions); C320 (stereo, 
foam ear cushions); C325 (stereo, 
3.5 mm, leatherette/foldable ear 
cushions) 
C435 C510 (monaural)
C520 (stereo)
C710 (monaural, PC + Mobile) 
C720 (stereo, PC + Mobile) 
C725 (stereo, PC + ANC)
P240 P610 (PC) 
P620 (PC + mobile)
Contextual intelligence/ 
smart sensors
Yes Yes
1.   Add desk phone connectivity when used with MDA200. 
2.  Features adaptive power, which optimizes for range and talk time to save battery life and maximize density.
3.  Performance dependent on battery and may vary by device. 
4.   Unlimited talk time with deluxe charging cradle kit, comes standard with Savi 445/745.  
Available as an accessory with Savi 740/440. 
5. The Calisto 835 connects to PC + mobile phone + home landline. 










