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alleycatcomp
Beginner

HELP! Cisco 521 - Shows X on screen

I have a Cisco 521 that is connected to a UC520 system.

 

When the phone boots, it says initializing network, and successfully gets an IP via DHCP, but then phone just shows an X on the screen.

 

Can anyone please help me troubleshoot this means?

 

Thanks!

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