Plantronics + Polycom. Now together as Polycom

Voice
Business Media Phones (CCX Series)
DECT IP Phones
QSX
Interop Solutions

Polycom QDX 6000

4.0.1 UPGRADE DEPENDENCY: Customers who used data pass through in 4.0 will need to use a new cable after the upgrade. The part number for the new Data Pass-Through cable is 2457-32892-001. Please contact your reseller or Polycom Sales team to acquire the new cable before the upgrade, if you currently use this feature.  - testing