I decided that it would be a good idea to learn how to use the Cisco IP phones (home learning), so I baught a second hand 7940G. When I got it it was abviously still configured for the previous owners network, so I did a factory reset and told it NOT to keep the network config. But I now keep getting error:
When it tries to boot now it keeps getting stuck on "Protocol Invalid Application"
I have tried resets 1 2 3 4 5 6 7 8 9 * 0 # also *6 hold #. after it does resetting and trying to boot showing configuring VLAN and IP etc it goes back to the error. It looked like after the error there was a small 0 and and "A" and I thought it could be a small padlock? so i tried **# but it do anything.
I am using Trixbox for the VOIP PBX, as it is free and I can't afford to pay out for CCM etc.
Please can anybody help?