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Title: OK, not great
Review: I connected a phone on the extension. Connection is stable (i.e., didn't lose connection during a phone call), but the sound quality is not good. For whatever reason, I HEAR MY OWN VOICE SO LOUD (I tried with several phone sets that work perfectly at ordinary outlets) that I can't carry on a conversation more than a few mins. I just answer there and quickly switch to another phone. I would not recommend it if you plan to use it for a serious cause.
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