IBM ThinkPad T21 Hardware Maintenance Manual page 49

Feature
Internal
modem
Audio
Infrared
transfer
802.11b (only
for T23 series)
PC Card
AC adapter
Bay device
Description
56.6 Kbps
v Internal microphone
v Internal speaker
v Software control volume
IrDA 1.1
Mini PCI Type-IIIa IEEE 802.11b wireless LAN
card
One Type-III or two Type-II
72-watt type
T20
v 1.44 MB (3-mode), 3.5-inch diskette drive
v 10-24x CD-ROM drive
v 6x DVD-ROM drive
T21, T22, T23
v 1.44 MB (3-mode), 3.5-inch diskette drive
v 10-24x CD-ROM drive
v 8x DVD-ROM drive
v CD-RW drive
v DVD/CD-RW combo drive
ThinkPad T20, T21, T22 and T23 series
Product overview
43