Couple things, pretty standard on all major PBX systems that trunk calls usually ring twice as many times on incoming calls..that's pretty much industry standard for the last 30 years at least. Second, just hook up a laptop with an ethernet crossover to the SV8100 ethernet port and set your IP address on your laptop to communicate with it then use a web browser to get into the system. If the password hasn't been changed all you have to do is walk through the wizard that is there to change the tone.