GN Netcom AT3M 2 Prong Telephone Amplifier w/Mute 01-0437 Plantronics amplifiers Can ONLY be used with

Can ONLY be used with PLT QD compatible headsets

5mm Jack headset jack on most basic cordless phones along with some Polycom and Panasonic

Contemporary

Huawei ET325

GN Netcom AT3M 2 Prong Telephone Amplifier w/Mute 01-0437 Plantronics amplifiers Can ONLY be used withThe AT3 is a telephone amplifier for phone systems requiring a PJ 327 Plug Prong interface. It is a unique product that offers a field replaceable headset cord and a 90 bend to minimize space and position the controls for easy access. Features: Mute version Mute LED to indicate when the mute mode is activated Full range volume control enables users to set comfort level FailSafe Compression to provide a constant output level with varying input signals;