The PowerBook G4 computer comes with a built-in modem. The connector for the modem is an RJ-11 connector on the back of the computer.
The modem has the following features:
The modem is connected to an internal USB port and is a vendor-specific USB device. The modem driver controls the modem hardware and presents a virtual serial port to the operating system and applications. Applications that bypass the operating sysem's modem driver and communicate directly with the SCC will not work properly.