As VoIP and IP-based PBXs continue replacing traditional PBXs and PSTNs, the telephony space is changing, and so are related credentials for IT professionals. Here are five of the best this year.from Tom's IT Pro
via CERTIVIEW
As VoIP and IP-based PBXs continue replacing traditional PBXs and PSTNs, the telephony space is changing, and so are related credentials for IT professionals. Here are five of the best this year.
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