With the latest fixed network telephony (IP), the phone is dependent on the Internet connection, and therefore also on the power supply. So, what should you do if there is a power failure?
You will be unable to make calls during a power failure. We therefore recommend that you set up call forwarding in the Swisscom Customer Center for this eventuality.
You don’t need to reconfigure your Internet-Box when there is a power failure. Simply wait until everything starts up again.
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