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Hello - The VTech DS6151 is not compatible with a partner phone system. The unit is designed to work with an analog, digital or VOIP line commonly found in a residential setting. Thank you, -VTech Support
Sorry, there was a problem. Please try again later.I do not know what a partner system is. It is two totally lines if you wanted to have two different people or businesses you could use this . Talk to your phone service provider.
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