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If you subscribe to a nationwide VoIP (voice over internet protocol) service, you may find out that they only supply one phone jack, and that they have no plans to activate the phone jacks that you already have your phones plugged into. Recommendations from them included buying a wireless phone system with multiple handsets or purchasing a wireless phone jack system. Because they won't do it for you, it's a good idea to learn how to activate all of your phone outlets yourself.
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