CDC slot
 
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CDC slotThe 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. Something worth to note is that all AC'97 ThinkPads with a CDC slot, do not adhere to Intel's MDC standard. This is due to how it uses a proprietary Hirose connector, instead of the specified TE Connectivity 3-179397-0 connector.
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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 approximately 45 x 27 mm, and all HD Audio CDCs are approximately 34 x 26 mm.
Ethernet CDCs
Bluetooth CDCs
Modem CDCs
- Modem Daughter Card (MDC)
- IBM Integrated 56K Modem (MDC-2)
- ThinkPad 56K Modem (MDC-1.5)
- ThinkPad Modem (MDC-3.0, 56kbps HDA)
Modem and Bluetooth Combination 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
with an AC'97 CDC slot
- T23, T30, T40, T40p, T41, T41p, T42, T42p, T43, T43p
- X22, X23, X24, X30, X31, X32, X40, X41, X41 Tablet
- R30, R31, R32, R40, R40e, R50, R50e, R50p, R51, R51e, R52
- G40, G41
- S30, S31
