Intel
®
Carrier Grade Server TIGPT1U TPS
Extended Front Panel System Board
Revision 1.0
31
4.3 Introduction
The extended front panel system board provides the means of mounting and electrically
connecting switches and indicators for system operation and status. These features are
accessible and visible from the front of the chassis. In addition, it contains the hard drive hot-
plug control circuitry necessary for the hot-plug SCSI disk drives. An alarms function is also
provided. The extended front panel system board is designed for use with telecom
SE7210TP1-E Server Baseboards.
Power
Supply
Aux I
2
C
BUS
34 Pin Front Panel
Connector
I
2
C B
U
S
Alarm/COM2
Connector
USB
Connector
PCF 8574
Alarms
Circuits
Front Panel
COM2/USB
Connector
MidPlane
Connector
PCF 8574
12
V
& 5V
Hot Swap
Power
Cntrl
Front Panel
Switches
Front Panel
LEDs
Figure 4-1. Extended Front Panel Board
4.4 Functional Description of Front Panel Switches, LEDs, and
Relays
4.4.1
Front Panel Switches
The front panel has a power switch, a reset switch, an NMI switch, and a system ID switch. The
function of each switch is described in the following table.
Table 4-1. Front Panel Switch Description
Switch Function
Power Switch
A momentary switch, APCI compliant, used to toggle system power on/off.
Reset Switch
A momentary switch used to reset the system when it is in the power-on
state.
NMI Switch
A momentary switch used to instruct the processor to copy system memory
to hard disk
System ID Switch
A momentary switch used to instruct the processor to toggle the state of the
system ID LED
