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Chapter 4: Motherboard Connections
Internal Speaker/Buzzer
The Internal Speaker/Buzzer (SP1) is used to provide audible indications for various beep
codes.
Internal Buzzer
Pin Denitions
Pin# Denition
1 Pos (+) Beep In
2 Neg (-) Alarm Speaker
4-pin BMC External I
2
C Header
A System Management Bus header for IPMI 2.0 is located at JIPMB1. Connect a cable to
this header to use the IPMB I
2
C connection on your system..
External I
2
C Header
Pin Denitions
Pin# Denition
1 Data
2 Ground
3 Clock
4 No Connection
Chassis Intrusion
A Chassis Intrusion header is located at JL1 on the motherboard. Attach the appropriate cable
from the chassis to the header to inform you when the chassis is opened.
Chassis Intrusion
Pin Denitions
Pins Denition
1 Intrusion Input
2 Ground