CDC slot

The Communications Daughter Card slot (CDC) in IBM literature or Modem Daughter Card slot (MDC) in Intel's standards, is the mobile version of the Audio/Modem Riser slot. There are two known implementations of this slot, featuring different connectors for different platforms. The Hirose DF12(5.0)-40DP-0.5V(86) connector is used on ThinkPads with an AC'97 audio codec, while the TE Connectivity 1-1775149-2 connector is used on ThinkPads with a HD Audio codec. These connectors may or may not be proprietary, although the Hirose connector is proprietary as it does not adhere to Intel's MDC standard, which specifies a TE Connectivity 3-179397-0 connector instead. Wikipedia article on CDC

Overview

Not all CDCs will work in compatible ThinkPads, even if they are using the same connector. This is due to a different electrical pin-out, which varies among ThinkPads. Some might even reject a pin-compatible CDC by displaying an 'Error 1803: Invalid Daughter Card' message.

Note that all AC'97 CDCs are 45 x 27 mm, and all HD Audio CDCs are 34 x 26 mm.

CDCs

Ethernet CDCs

• Ethernet Daughter Card (EDC)

Bluetooth CDCs

• Bluetooth Daughter Card (BDC)

Modem CDCs

• Modem Daughter Card (MDC)
• ThinkPad 56K Modem (MDC-1.5)
• IBM Integrated 56K Modem (MDC-2)
• ThinkPad Modem (MDC-3.0, 56kbps HDA)

Combo Modem and Bluetooth CDCs

• 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)

Models featuring this technology

• W500
• A30, A30p, A31, A31p
• T23, T30, T40, T40p, T41, T41p, T42, T42p, T43, T43p, T60, T60p, T61, T61p, T400, T500
• X22, X23, X24, X30, X31, X32, X40, X41, X41 Tablet, X60, X60s, X60 Tablet, X61, X61s, X61 Tablet
• R30, R31, R32, R40, R40e, R50, R50e, R50p, R51, R51e, R52, R60, R60i, R60e, R61, R61i
• G40, G41, G50
• S30, S31
• Z60m, Z60t, Z61e, Z61m, Z61p, Z61t