Asus P5B - Manual (Page 36)

ASUS TeleSky User Manual
To set the waiting tone for outgoing calls, do the following:
Select a tone from the dropdown list or Default to select the
default tone.
To edit your tones, click Tone list edit. The tone list edit
screen appears.
Select the tone you wish to use and click Apply and OK to
save all settings.
To add a new tone, click the icon. A browser window
appears. Select the location of the tone and click OK.
To delete a tone, select the tone from the list and click the
icon.
Dial Tone Customization
Note:
Ring tone limitations:
1. Ring tones must be in .wav format.
2. Ring tones cannot be larger than 1MB in size.