How to Connect a USB Camera through a Bus (ADB) port?

I want to connect a portable mouse or my Digital camera to my Apple Powerbook G3 , but all it has is a Bus (ADB) port . I dont want to use the card slot because it is being used for the internet . Is there a converter that will switch ADB Port to a USB Port . i know they have one that does the opposite . Please help .

nope.

only usb to adb are available

there are many cardslot to usb. get that, a usb hub and a usb lan