IBM ThinkPad R40 series Service Manual page 16

Features
Diskette drive - available on selected models
To get the best performance from your diskette drives, use high-quality
diskettes (such as IBM diskettes) that meet or exceed the following standards:
v 1-MB, 3.5-inch, unformatted diskette:
– ANSI (American National Standards Institute) X3.137
– ISO (International Standards Organization) 8860
– ECMA (European Computer Manufacturers Association) 100
v 2-MB, 3.5-inch, unformatted diskette:
– ANSI X3.171
– ISO 9529
– ECMA 125
External interface
v Parallel connector (IEEE 1284A)
v External-monitor connector
v PC Card slot (Type II, or Type III PC Card)
v Stereo Headphone jack
v Microphone jack
v S-Video out connector
v 2 Universal Serial Bus (USB 2.0) connectors
v Infrared port
v RJ11 telephone connector (available if the modem feature is installed)
v RJ45 Ethernet connector
v Ultrabay
v Port Replicate connector
v IEEE 1394 port (on some models)
v Integrated Bluetooth feature (on some models)
v Integrated Microphone
v Integrated wireless LAN (IEEE 802.11b) feature (on some models)
v Integrated wireless LAN (IEEE 802.11a/b) feature (on some models)
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ThinkPad R40 Series Service and Troubleshooting Guide
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