I think the orange/amber led on the Cisco EPC 3925 modem/router is just to tell you that the N-50 has connected at the lower speed of up to 100Mbps (as opposed to the full speed of up to 1000Mbps with the green led). 100Mbps is the fastest the N-50 can go via ethernet, so this should actually be ok.
When does the N-50 display the 'Server Error' message?
What are all the Setup>System Info values/settings on your N-50, eg, Network State, MAC, IP, DHCP, Release ID, etc?
Last edited by Cebolla; 02-06-2015 at 04:23 PM.