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UC540 Auto Attendant can't dial / reach Analog Extensions of the FXS Ports

Hi All,

   I've got this strange issue. Our UC540 is working for the most part. The only problem we have left is when people dial into the Auto Attendant and they try to dial the extensions of our analog phones running off of the FXS ports, it errors out saying "invalid extension". From those analog phone we can dial out fine, we can dial to/from other phones analog and digital. What could be the issue?

Thanks,

Tom

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