friends gave me the phone but I can’t connect it correctly. CX3000 - connected via Ethernet (working, as powered via Ethernet!), but when it loads shows as Network cable was not detected (despite being powered via that very same cable).
Normal troubleshooting - replaced cables, tried other phones in same socket, tried phone in another socket. Only thing that doesn't work is the phone...
If this still fails, and you are sure the network connection is working we must assume it is defective. Only an RMA can be used to get a unit repaired.
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