How to eliminate echo from my Plantronics wireless headset when using Toshiba Strata Phones (IP 5000 series - 5131-SDL, 5122-SD, 5132-SD, 5522-SD, 5531-SDL, 5622-SD, 5631-SDL)
Plantronics C054 Pairing Guide- Syncing Your Microphone To The Charging Base - YouTube
3 Steps To Fix Your Plantronics C054 Echo – Merrittcomm Blog | Wired & Wireless Headsets, Productivity, Efficiency
Plantronics CS540 Wireless Headset Troubleshooting and Setup - HeadsetPlus.com Plantronics, Jabra Headset Blog
Plantronics CS540 Wireless Headset - Headsets Direct
Plantronics CS540 Wireless Headset - Headsets Direct