This is the Polycom 2.5mm to RJ-9 (female) Headset interface adapters (5-pack) Compatible with SoundPoint IP 330/331 and 320/321 phones
- Allows Plantronics APP--5 and APP-50 hookswitch (EHS) to be used with Polycom IP 320/330 series phones.
- Previous part# 2200-11095-001, 2457-11095-001
*IMPORTANT NOTE: Due to this manufacturer's policy - Unless it's unopened and unused in the original product box, this product is Non-Returnable/Non Refundable. Any defective product will be replaced by the manufacturer.