how to collect 7900&8950 IP phone log

lOn the Phone,If phone is registered, Press button [Apps]->[Status]->[Network]，find the phone’s IP.
  If phone is unregistered, Press button [More]->[Network]->[Status]->[Network], find the phone’s IP.
lOpen IE browser in the PC, Input the phone’s IP, access the phone’s web interface. lInput web username and password, the default username is admin, the default password is admin123 or admin. lAfter log in the web, click [Advanced]->[Diagnostics]. You can click [Export] button to collect the phone’s log.
lIf the log type is not ‘Debug’. You should select Debug and click [Save]. Then make the phone’s problem occur again. R&D analysis need ‘Debug’ type phone log.