CDC slot

The CDC (Communications Daughter Card) slot is an internal expansion slot found in modern ThinkPads.

It is not meant for customer upgrades

If anyone knows more details, please elaborate.

CDC Adapters

• Ethernet Daughter Card (EDC)
• Bluetooth Daughter Card (BDC)
• ThinkPad Bluetooth with Enhanced Data Rate (BDC-2)
• Modem Daughter Card (MDC)
• IBM Integrated 56K Modem (MDC-2)
• IBM Integrated Bluetooth II with 56K Modem (BMDC)
• IBM Integrated Bluetooth III with 56K Modem (BMDC-2)
• IBM Integrated Bluetooth IV with 56K Modem (BMDC-3)

Linux support

The different cards appear as either PCI, AC97 or USB devices.

Models featuring this Technology

• ThinkPad A30, A30p, A31, A31p
• ThinkPad G40, G41, G50
• ThinkPad Template:R14, Template:R15, R30, R31, R32, R40, R40e, R50, R50e, R50p, R51, R51e, R52, R60, R60e, R60i, R61, R61e, R61i, R400, R480, R490, R500, R580, R590
• ThinkPad S30, S31
• ThinkPad T23, T30, T40, T40p, T41, T41p, T42, T42p, T43, T43p
• ThinkPad X22, X23, X24, X30, X31, X32, X40, X41, X41 Tablet
• ThinkPad Z60m, Z60t, Z61e, Z61m, Z61p, Z61t