JXT6966 / JXTS6966 Technical Reference
Specifications
1-13
CHASSIS PLANS
P4A/P4B Ethernet LEDs and Connectors
The
I/O bracket houses the two RJ-45 network connectors for Ethernet LAN1and LAN2. Each LAN
interface connector has two LEDs that indicate activity status and Ethernet connection speed. Listed below
are the possible LED conditions and status indications for each LAN connector:
LED/Connector
Description
Activity LED
Green LED which indicates network activity. This is the upper LED on the
LAN connector (i.e., toward the upper memory sockets).
Off
Indicates there is no current network transmit or receive activity.
On (flashing)
Indicates network transmit or receive activity.
Speed LED
Green LED which identifies the connection speed. This is the lower LED on
the LAN connector (i.e., toward the edge connectors).
Off
Indicates a valid link at 1000-Mb/s.
Green
Indicates a valid link at 100-Mb/s.
RJ-45 Network
Connector
The RJ-45 network connector requires a category 5 (CAT5) unshielded
twisted-pair (UTP) 2-pair cable for a 100-Mb/s network connection or a
category 3 (CAT3) or higher UTP 2-pair cable for a 10-Mb/s network
connection. A category 5e (CAT5e) or higher UTP 2-pair cable is
recommended for a 1000-Mb/s (Gigabit) network connection
Status LEDs
Thermal Trip LED – LED9
The thermal trip LED indicates when a processor reaches a shut down state. The LED is located just above
the BK02 DIMM socket. LED9 indicates the processor shutdown status and thermal conditions as
illustrated below:
LED Status
Description
Off
Indicates the processor or processors are operating within acceptable
thermal levels
On (flashing)
Indicates the CPU is throttling down to a lower operating speed due to rising
CPU temperature
On (solid)
Indicates the CPU has reached the thermal shutdown threshold limit. The
SHB may or may not be operating, but a thermal shutdown may soon occur.
NOTE:
When a thermal shutdown occurs, the LED will stay on in systems using non- ATX/EPS power
supplies. The CPU will cease functioning, but power will still be applied to the SHB. In systems with
ATX/EPS power supplies, the LED will turn off when a thermal shutdown occurs because system power is
removed via the ACPI soft control power signal S5. In this case, all SHB LEDs will turn off; however,
stand-by power will still be present.
