Hi all, I wonder If someone can help me. I have a problem on my UC520; if all trunks are busy and if you dial a number you hear a fast busy tone and read on the display set "unknown number". This is wrong because cause confusion on the customer and they call me saying that I made a mistake on the configuration. I think the system should say " no free lines " or " no lines " or something different than "unknown number". Don't you think?
Is there a way to fix this?