I guess thinking about it, I shouldn't be too quick to say default the system. Just easier to me to start over, then undoing a lot of programming that doesn't need to be there, and may cause problems in some cases.
You could still make a backup of current config onto Smart Media (then to Admin PC if you want) so you won't lose anything. To bring back old config. just put the SM card in, initiallize, and you're back up and running.
I have put in a couple of basic systems that I basically turned it on, set the time/date, and was done. The default setting will get all lines ringing all phone, but it won't have voicemail setup, Caller ID won't work, exts start at 200 on up, phone buttons blank except for lines. Other problem would be if you had more ports then linenses (32 lines/exts out of the box).
Good luck Ringtone which ever way you go.
