This product has been discontinued


  • Allows you to connect your corded or wireless headset to the headset jack of your phone
  • Works with most 2.5mm headset jacks
  • Call 1-800-HEADSETS (1-800-432-3738) to check for compatibility with your phone


The Polycom Female RJ9 to Male 2.5mm Headset Adapter allows you to plug your headset into the 2.5mm headset jack of your phone. This adapter is a quick and easy solution for your phone if you have a headset jack.

Required for the following Polycom SoundPoint IP phone models:

320 series
321 series
330 series
331 series

Not sure if this is the right adapter for your needs? To check for compatibility with your phone, give us a call at 1-800-HEADSETS (1-800-432-3738).

Technical Specifications

Manufacturer Executive Pro
Catalog Number 2178
Type Corded
Weight 0.3 oz.
Compatibility Works with specific corded office phone models
Color Black
Special Technologies Not Applicable
Warranty 1-Year Full Replacement
Battery Life 0
Handset Lifter Compatible Not Applicable
What's in the box? One headset adapter

Customer Reviews (312)