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What You Should Know About The POTS Shutdown for Businesses & Upgrading to VoIP. Contents The POTS shutdown for businesses is already underway—and it’s not just about phone calls. If your systems rely on copper landlines, you’re facing more than lost connections. You’re risking service interruptions that can affect life safety systems, compliance, and daily operations. We’ll explain what this shutdown is and how it affects your business. What is the POTS Shutdown? Plain Old Telephone Service (POTS) lines, the copper-based phone lines that powered most business communications for decades, are being phased out across the U.S. Major carriers have begun removing