If this is a new system for you... make sure your phone does not have the touch tone buttons build into the handset. If they are, like in a Trimline phone the CS55 will not work and produce only one way communication.
You either have it set on mute or the mouthpiece isn't adjusted properly. Do a sound check to make sure it's where it needs to be.
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If this is a new system for you... make sure your phone does not have the touch tone buttons build into the handset. If they are, like in a Trimline phone the CS55 will not work and produce only one way communication.
You either have it set on mute or the mouthpiece isn't adjusted properly. Do a sound check to make sure it's where it needs to be.