PowerBook G3 Modem Updater will update the modem drivers for you PowerBook G3 computer. Version 1.0.2 changes the sound monitor source to 'None' while powering the modem on or off in order to prevent the 'pop' sound.
At close time, restore the sound monitor source to whatever it was at open time, unless the user has changed it in the meantime. Improved power on/off and reset strategy to recover from possible modem error conditions. All PowerBook G3 Series computers with the Apple built in modem should upgrade to version 1.0.2 of the modem extension.