Intel SRSH4 Service Guide - Page 113

Main Jumpers, Serial Port B Jumpers

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Main Jumpers Table 12 identifies the function of each pin pair on the main jumper blocks (JP4, JP5, and JP6). The BIOS Recover, Password Clear, and CMOS Clear jumpers are described in more detail elsewhere in this product guide (see the references in Table 12). The FRB3 Timer Disable jumper and the BMC Force Update jumper are special purpose jumpers that you should use only when instructed to do so by an NEC support document. When you do need to enable any of these features, use one of the spares from JP4 pins 1 and 2 or JP25 pins 7 and 8. Table 12. Main Jumper Descriptions 1-2 Spare. 3-4 BIOS Recovery-System will attempt to recover the BIOS at the next boot. For more JP4 information, 5-6 Reserved. 7-8 Reserved. 9-10 Password Clear-User and administrator passwords are cleared at the next boot. For more information, see page 24. 11-12 CMOS Clear-CMOS settings are cleared at the next boot. For more information, please see "N8100-821F NEC Express5800/140Rc-4 User's Guide" (856-121794-50200). JP5 1-2 FRB3 Timer Disable-Disables fault resilient boot timer 3. JP6 1-2 BMC Force Update-Lets a system with corrupted BMC firmware boot for an update. Serial Port B Jumpers Table 13 identifies the function of each pin pair on the serial port B jumper block (JP25). By default, the serial port B connector is an RJ45, which has only eight pins and doesn't provide separate DCD and DSR signals. The serial port B jumpers let you configure the DSR and DCD signals passed from the port connector to the inputs of the UART. The default configuration has jumpers installed on pins 1 and 2 and on pins 3 and 4. ✏ NOTE Never install jumpers on pins 3 and 4 and on pins 5 and 6 at the same time. This would cause both the DCD and DSR signals from the connector to drive the DCD input on the UART, resulting in signal contention. Table 13. Serial Port B Jumper Descriptions 1-2 DSR to DSR-DSR from connector is passed to DSR input on UART (RJ45 & DB9). 3-4 DSR to DCD-DSR from connector is passed to DCD input on UART (RJ45 only). JP25 5-6 DCD to DCD-DCD from connector is passed to DCD input on UART (DB9 only). 7-8 Spare. Server Description 113

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Main Jumpers
Table 12 identifies the function of each pin pair on the main jumper blocks (JP4, JP5, and JP6).
The BIOS Recover, Password Clear, and CMOS Clear jumpers are described in more detail
elsewhere in this product guide (see the references in Table 12).
The FRB3 Timer Disable jumper
and the BMC Force Update jumper are special purpose jumpers that you should use only when
instructed to do so by an NEC support document.
When you do need to enable any of these
features, use one of the spares from JP4 pins 1 and 2 or JP25 pins 7 and 8.
Table 12.
Main Jumper Descriptions
1-2
Spare.
3-4
BIOS Recovery—System will attempt to recover the BIOS at the next boot.
For more
information,
5-6
Reserved.
7-8
Reserved.
9-10
Password Clear—User and administrator passwords are cleared at the next boot.
For
more information, see page 24.
JP4
11-12
CMOS Clear—CMOS settings are cleared at the next boot.
For more information,
please see “N8100-821F NEC Express5800/140Rc-4 User's Guide” (856-121794-502-
00).
JP5
1-2
FRB3 Timer Disable—Disables fault resilient boot timer 3.
JP6
1-2
BMC Force Update—Lets a system with corrupted BMC firmware boot for an update.
Serial Port B Jumpers
Table 13 identifies the function of each pin pair on the serial port B jumper block (JP25).
By
default, the serial port B connector is an RJ45, which has only eight pins and doesn’t provide
separate DCD and DSR signals.
The serial port B jumpers let you configure the DSR and DCD
signals passed from the port connector to the inputs of the UART.
The default configuration has
jumpers installed on pins 1 and 2 and on pins 3 and 4.
NOTE
Never install jumpers on pins 3 and 4 and on pins 5 and 6 at the same time.
This would cause both the DCD and DSR signals from the connector to drive
the DCD input on the UART, resulting in signal contention.
Table 13.
Serial Port B Jumper Descriptions
1-2
DSR to DSR—DSR from connector is passed to DSR input on UART (RJ45 & DB9).
3-4
DSR to DCD—DSR from connector is passed to DCD input on UART (RJ45 only).
5-6
DCD to DCD—DCD from connector is passed to DCD input on UART (DB9 only).
JP25
7-8
Spare.
Server Description
113