Plantronics M22 Vista Amplifier Beginner’s Guide

For phones without an RJ9 or 2.5mm headset jack. For use on single and multi-line telephones. The M22 amp is compatible with any of Plantronics H-series headsets. The M22 plugs into the handset jack on your phone, the handset cord is then plugged into the M22. Some features on the M22 are: Volume control dial … Continued