1. Digital audio connector
This connector is for a digital signal output cable.
2. Analog audio connector
This connector is for an analog signal output cable.
3. Jumper terminals
These pins allow you to select either Master, Slave, or Cable Select
mode for the CD-ROM device.
4. IDE connector
This connector is for a 40-pin IDE cable to connect the drive to the IDE
interface on the motherboard.
5. Power connector
This DC connector is for a 4-pin power cable from the system power
NOTE: The jumper pins on the leftmost part of the rear panel are
factory test pins. DO NOT cover these pins with jumper blocks.
ASUS CRW-3212A User's Manual