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Poly CX300 Desktop USB Phone for MS Lync

This is now an end of life product – Please contact our sales team foe the updated models.

The Poly CX300 brings new meaning to the USB desktop phone with a two-line monochrome display, telephone keypad and wideband high fidelity audio. The CX300 seamlessly integrates with Microsoft® Office Communications Server 2007 R2 and provides the look, sound, and feel of a conventional enterprise-grade telephone with plug-and-play ease of use.


Superb voice quality

The CX300 desktop phone was designed to be used as a regular handset. Calls may be placed or answered using the phone or a Microsoft® Office Communicator 2007 R2 client window. Like a traditional phone, the CX300 includes convenient buttons for controlling calls, such as a full dial pad, two-line monochrome backlit display, and keys for controlling volume, mute, speakerphone, hold, redial, and external headset mode. The phone also includes advanced features such as a presence status indicator and integrated message waiting indicator.

Ease of Use

  • Convenient dial pad and 2 line monochrome backlit display
  • Plug and play operation to a USB port on the PC

Superior Voice Quality

  • Clear high definition wideband audio maximises the accuracy and productivity of real-time conversations whether handset, full duplex speakerphone or headset mode

Enhanced Presence Indicator

  • Presence status monitoring to efficiently route calls


Superb Voice Quality – Clear high definition wideband audio maximizes the accuracy and productivity of real-time conversations whether in handset, full duplex speakerphone, or headset mode Ease of provisioning – Seamless integration with and complement to the capabilities of Microsoft Office Communicator 2007 R2 Enhanced presence indicator – Presence status monitoring to efficiently route calls Familiar form factor – convenient dial pad and display like a traditional phone Ease of Use – Driverless plug-and-play USB operation from phone to PC Unique Collaboration – Poly offers the only complete line of integrated voice and visual communication solutions for Microsoft collaboration tools.

Size (H x W x D)
Handset: 19.05 x 5.08 x 1.91 cm (7.5 x 2.0 x 0.75 in)
Cradle: 8.89 x 13.97 x 12.7 cm (3.5 x 5.5 x 5.0 in)

Unit: 1.10 kgs (2.43 lbs)
Handset: 0.21 kgs (0.45 lbs)
Shipping Weight: 1.10 kgs (2.43 lbs)

Supply voltage 5V provided by USB connection
Power consumption 500 mA

Device to PC Interface
USB 2.0
Captive 6.56 feet (2.0 m) USB cable

Device Controls and Keypad
4x3 dialpad
Redial key
Flash Key
Delete Key
Mute/unmute key
Speaker on/off key
Handset/headset key
Volume up/down key

LED Indicators
Off hook indicator
Voice messaging indicator
Speakerphone indicator
Headset indicator
Call forwarding indicator
Multi-colour LED presence indicator

Frequency response: 200Hz - 7kHz
> 58 dB
Dynamic range: >80 dB (@ 1kHz)
Total Harmonic Distortion + Noise: <3% (@ 1kHZ)

Auxilliary Audio Output
RJ9 headset jack with built-in amplifier

Audio Enhancements
Automatic Gain Control
Dynamic Noise Reduction
Acoustic Echo Cancellation
Minimum System Requirements
PC with Office Communicator 2007 R2 installed
Windows XP or Windows Vista
One available USB 2.0 compliant connection

Environmental Requirements
Temperature: 0°C to 40°C (32°F to 104°F)
Relative Humidity: 95% max (non-condensing)
Altitude: -304.8 metre to 3962.4 metre (-1000 feet to
13,000 feet)
Light Exposure: Fluorescent overhead lighting and windowfiltered
daylight (typical offices)

Regulatory Compliance – Approvals Gained
Electrical Safety
- UL60950-1 (USA / Canada)
- IEC / EN60950-1 (EU)
EMC – General
EMC – USA (Class B)
- FCC Part 15
EMC - Canada (Class B)
- ICES00.3: 1998
EMC – EU (Class B)
- EN 55022-
- EN 55024
EMC – ROW (Class B)
- C-Tick (Australia)
- VCCI (Japan)
- GOST (Russia)
- MIC (Korea)
- CQC (China)

12 months

Poly CX300 Desktop Phone Ships With:
Poly CX300 Desktop Phone base
6 ft. handset curly cord
Captive USB cable
Quickstart Guide
Product Registration Card
Warranty card
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