Lucent Technologies 9077 16S - Manual (Page 25)

Introduction to the SP Switch Router Adapter card
SP Switch Router Adapter card LEDs
SP Switch Router Adapter Guide - 1.4 Update 2 October 22, 1999 1-9
SP Switch Router Adapter card LEDs
The “RX” and “TX” LEDs are under software control and indicate port states on receive and
transmit sides. The “MD” and “SW” LEDs are hardware-controlled and reflect data activity on
the SP Switch Router switch core or interface side of receive and transmit ports.
Figure 1-4. LEDs on the SP Switch Router Adapter card
LED activity during boot
During boot and resets, the four software-controlled LEDs indicate different media card
activities by flashing in specific patterns. Refer to Table 1-1 for a description of each pattern.
RX HB RX ST0 RX ST1 RX ERR PWR ON 3V SW XMIT MD RCV TX HB TX ST0 TX ST1 TX ERR SW RCV MD XMIT
“Top” end of card “Bottom” end of card
Table 1-1. SP Switch Router Adapter card LED activity during boot and reset
LED Description
• RX HB (green)
• RX ST0 (green)
• RX ST1 (amber)
• RX ERR (amber)
• ON At reset, all LEDs are lit for 1/2 second
• ON as part of on-board diagnostics.
• ON Also tests that LEDs are working.
• ON
• OFF ERROR - During a boot or reset, this pattern indicates
• OFF a checksum error is detected in
• OFF flash memory.
• ON
• ON ERROR - During a boot or reset, this pattern indicates
• OFF that the SRAM fails the memory test.
• ON
• OFF
• ON -> OFF - During loading, HB and RX ST1 flash
• OFF as each section of the code loads.
• OFF
• ON -> OFF