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I just got myself a Cisco SPA 525G2 -5Line ip phone to configure which is totally not working.
I'm configuring it in SIP mode with the a static IP address.
The following have all been configured and rechecked :STUN Server:SIP ParametersSIP Port numberProxy:
When all these configuration are saved .. I still get the following error message :
++++++Registration State: Failed - Not Reachable
Can I kindly get help from or tips in configuring this? Thanks