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Small Business Resources / Troubleshooting

I hear an “extension has not been set up” error message when I pick up the handset

Last Updated: July 21, 2025

Log in to Ooma Office Manager and make sure that your Grandstream ATA phone port, your Linx device, or your Base Station phone port has been assigned to a user. You can learn more about assigning a device to a user in our knowledgebase article.

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