Incoming call leveling - all calls (no matter what the souce) come in at the same user controlled comfortable level
Echo control - reduces the possiblity of echo with delays inherent in VoIP networks
Incoming noise reduction - reduces line noise when talking
Background noise reduction - reduces transmission of background noise when listening
Receive and transmit bandwidth supports TIA-920 voice bandwidth (150Hz to 6800Hz, up from 300Hz to 3400Hz with traditional telephony)
Keep incoming sounds at a consistent listening level: fax tones and loud calls will be reduced to your chosen preset incoming audio level
Quick disconnect between the headset and this amplifier allows you to snap the cords apart without having to remove your headset or disconnect your call
Ergonomically designed buttons and dials - rotary volume control, headset/handset switch, locking mute button
Echo management feature reduces echo on VoIP telephone systems
Utilizes wideband technology for phone systems that are wideband enabled
If your phone is not wideband the M22 amplifier will still sound great
The Plantronics M22 amplifier replaced the M12 and and has Clearline Audio Technology for superior audio performance with VoIP phone systems on wideband calls (must be wideband end to end)
M22 buttons are light putty color (M12 buttons were plum) and M22 is lighter gray than discontinued M12
Backwards compatible with all phones the M12 was compatible with, and works with traditional phone lines as well as wideband for "future proofing"
Comes with modular pigtail cord (in back) and 10 foot modular coil cord (front) that has Plantronics Quick Disconnect (QD) for connecting to Plantronics headset tops
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