Features and specifications
External interface
 Serial connector (EIA-RS232D)
 Parallel connector (IEEE 1284A—supports an
external-diskette-drive interface with attached cable and adapter)
 External input-device connector
   External-monitor connector
   Expansion connector
 PC Card slots (two Type I or Type II PC Cards, or one Type III
PC Card)
   Headphone jack
   Line-in jack
   Microphone jack
   Infrared port
 Universal serial bus (USB) connector
 Telephone connector (available if the modem Mini-PCI Card or
the Combo Mini-PCI Card is installed)
 Ethernet connector (available if the Ethernet Mini-PCI Card or the
Combo Mini-PCI Card is installed)
 UltraPort connector to support an optional IBM digital camera
   Video-out connector
   Ultrabay 2000
4 IBM ThinkPad T20 User's Reference