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They are 1 and the same.The V at the end of CM500V designates Voice over IP. There is a CM500 that does not VOIP capabalites. I hope this helps.
Sorry, there was a problem. Please try again later.Should be just the Telephony jacks for VIOP phone lines on this new one.
Sorry, there was a problem. Please try again later.Pretty sure they are the sam
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