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Configuring a EVM-HDA-6FXO for power failure

I want to add a EVM-HDA-6FXO to an exsiting EVM-HDA-8FXS/DID so if power goes out I can still have the FXO ports provide dial tone to the FXS ports.

Two emergency lines NPA-NXX-1000 comes in as a FXO and goes out a FXS port.

Can this be done. And does it work if the power is off to the router.

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Re: Configuring a EVM-HDA-6FXO for power failure

The FXO expansion module supports a power failure port that connects directly to the central office (CO) in case of failure.

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