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There are a number of LEDs on the bulkheads of many cards in a LightStream 2020 multiservice ATM switch (LS2020 switch). The information provided by the LED is also provided by the StreamView monitor application on the NMS. LEDs serve the following purposes:
The switch card, NP, and line card LEDs are visible from the front of the LS2020 chassis. The LEDs on the access cards are visible from the rear of the chassis.
If the fault (FLT) LED on a line card, NP card, or switch card is on:
This section (consisting of Table A-1 through Table A-11) describes the LEDs on all LS2020 cards.
Name | Color | Description |
---|---|---|
FLT (fault) | Yellow | Turned on by power-on reset, turned off when POST passes. Shines steadily to signal a problem. See the section "LEDs" for more information. |
RDY (ready) | Green | Controlled by the TCS hub. Blinks while POST runs. When tests complete and are passed, light stays on continuously. LED is turned off by power-on reset. The READY light indicates that TCS is ready to use either hub as the primary hub, or to take over from the primary in case of failure. This LED remains lit if one port is having a problem, as long as the overall functionality of the board is intact. |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
TCS | Green | Illuminates when TCS hub has power. |
VCC (power) | Green | Illuminates when the board has power. |
TCS SEL | Green | Indicates that the TCS hub on this card is primary. (Note that the primary hub and the active switch fabric may not be on the same switchcard.) Console output is directed to the console port of the switch card on which this LED is lit. |
BITS OK | Green | Illuminates to indicate the BITS clock is providing a valid clock signal. |
Name | Color | Description |
---|---|---|
FLT (fault) | Yellow | Turned on by power-on reset, turned off when POST passes. Shines steadily to signal a problem. See the section "LEDs" for more information. |
RDY (ready) | Green | Controlled by the TCS slave. Blinks while POST runs. When tests complete and are passed, the light stays on continuously. Turned off by power-on reset. |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
VCC (power) | Green | Illuminates when main 5V supply on the card is turned on. |
TCS | Green | Illuminates when the 5V TCS power supply on the card is active. Is lit whenever the bulk power supply is turned on. |
A | Green | Illuminates when the active TCS hub is on the switch card in slot A. |
B | Green | Illuminates when the active TCS hub is on the switch card in slot B. |
TX | Green | Illuminates when the TSU is sending a non-null cell. |
RX | Green | Illuminates when the FSU is receiving a non-null cell. |
Name | Color | Description |
FLT (fault) | Yellow | Turned on by power-on reset, turned off when POST passes. Shines steadily to signal a problem. See the section "LEDs" for more information. |
RDY (ready) | Green | Blinks while POST runs and illuminates continuously when POST completes and passes. Turned off by power-on reset. |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
VCC (power) | Green | Illuminates when the card's main 5V supply is within normal levels. |
TCS | Green | Illuminates when the 5V TCS supply is within normal levels. |
A | Green | Illuminates when the active TCS hub is on the switch card in slot A. |
B | Green | Illuminates when the active TCS hub is on the switch card in slot B. |
TX | Green | Illuminates when the TSU is sending a non-null cell. |
RX | Green | Illuminates when the FSU is receiving a non-null cell. |
0 - 7 | Green | Illuminates when the port indicated is active. |
Name | Color | Description |
FLT (fault) | Yellow | Turned on by power-on reset, turned off when POST passes. Shines steadily to signal a problem. See the section "LEDs" for more information. |
RDY (ready) | Green | Blinks while POST runs and illuminates continuously when POST completes and passes. Turned off by power-on reset. |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
VCC (power) | Green | Illuminates when the card's main 5V supply is within normal levels. |
TCS | Green | Illuminates when the 5V TCS supply is within normal levels. |
A | Green | Illuminates when the active TCS hub is on the switch card in slot A. |
B | Green | Illuminates when the active TCS hub is on the switch card in slot B. |
TX | Green | Illuminates when the TSU is sending a non-null cell. |
RX | Green | Illuminates when the FSU is receiving a non-null cell. |
0, 1 | Green | Illuminates when the port indicated is active. |
Name | Color | Description |
FLT (fault) | Yellow | Turned on by power-on reset, turned off when POST passes. Shines steadily to signal a problem. See the section "LEDs" for more information. |
RDY (ready) | Green | Blinks while POST runs and illuminates continuously when POST completes and passes. Turned off by power-on reset. |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
VCC (power) | Green | Illuminates when the card's main 5V supply is within normal levels. |
TCS | Green | Illuminates when the 5V TCS supply is within normal levels. |
A | Green | Illuminates when the active TCS hub is on the switch card in slot A. |
B | Green | Illuminates when the active TCS hub is on the switch card in slot B. |
TX | Green | Illuminates when the TSU is sending a non-null cell. |
RX | Green | Illuminates when the FSU is receiving a non-null cell. |
LN FLT (line fault) | Yellow | Illuminates when at least one port either has no cable connected to it or is configured to be active (port status/ifAdminStatus = up) and has errors. When LN FLT is lit, try the following: |
LNS OK | Green | Illuminates when at least one port that is configured to be up is functioning properly. This LED turns off if all ports' administrative and operational statuses are down, or if all active ports have errors or missing cables. |
Name | Color | Description |
---|---|---|
FLT (fault) | Yellow | Turned on by power-on reset, turned off when POST passes. Shines steadily to signal a problem. See the section "LEDs" for more information. |
RDY (ready) | Green | Blinks while POST runs and illuminates continuously when POST completes and passes. Turned off by power-on reset. |
FLT/RDY | Both LEDs illuminate when flash is loading. | |
VCC (power) | Green | Illuminates when the card's main 5V supply is within normal levels. |
TCS | Green | Illuminates when the 5V TCS supply is within normal levels. |
A | Green | Illuminates when the active TCS hub is on the switch card in slot A. |
B | Green | Illuminates when the active TCS hub is on the switch card in slot B. |
TX | Green | Illuminates when the TSU is sending a non-null cell. |
RX | Green | Illuminates when the FSU is receiving a non-null cell. |
LN FLT (line fault) | Yellow | Illuminates when at least one port either has no cable connected to it or is configured to be active (port status/ifAdminStatus = up) and has errors. When LN FLT is lit, try the following: |
LNS OK | Green | Illuminates when at least one port that is configured to be up is functioning properly. This LED turns off if all ports' administrative and operational statuses are down, or if all active ports have errors or missing cables. |
Name | |||
MSAC | T3AC and E3AC | Color | Description |
RXC (receive clock) | R | Green | Illuminates when a DS3 transmitter is present at the other end of the connection. Goes out to indicate that clock is not being received. |
OOF (out of frame) | O | Yellow | Illuminates when the DS3 transmitter at the other end of the connection is not sending framing pulses. |
FERF (far end receive failure) | F | Yellow | Illuminates when the DS3 transmitter at the other end of the connection is not receiving framing pulses from this port. |
AIS (alarm indication signal) | A | Yellow | Illuminates when this port receives an indication that an error has occurred in an upstream device. |
Name | Color | Description |
0 - 7 (port LEDs) | Green | Illuminates when the port indicated is receiving or transmitting packets. |
FLT1 (fault) | Yellow | This LED echoes the state of the LN FLT (line fault) LED on the PLC in the same slot. (PLC LEDs are described in Table A-5 .) |
VCC1 (power) | Green | Illuminates when the card's main 5V supply is within normal levels. |
1These LEDs are not present on the FEAC. |
Name | Color | Description |
FLT (fault) | Yellow | This LED echoes the state of the LN FLT (line fault) LED on the PLC in the same slot. (PLC LEDs are described in Table A-5 .) |
VCC (power) | Green | Illuminates when the card's main 5V supply is within normal levels. |
0A, 0B, 1A, 1B (port LEDs) | Green | Illuminates when the port indicated is ready to transmit or receive data. |
Name | Color | Description |
LOS (loss of signal) | Yellow | Illuminates if this port is not receiving an input signal. |
AIS (alarm indication signal) | Yellow | Illuminates when this port receives an indication that an error has occurred in an upstream device. |
Name | Color | Description |
SD (signal detect) | Green | Illuminates when an incoming signal is detected on the port indicated. If this LED goes out, it may indicate either a loose cable or a fault in the remote device. |
OOF (out of frame) | Yellow | Illuminates when the device at the other end of the connection is not sending framing pulses. |
FERF (far end receive failure) | Yellow | Illuminates when the device at the other end of the connection is not receiving framing pulses from this port. |
AIS (alarm indication signal) | Yellow | Illuminates when this port receives an indication that an error has occurred in an upstream device. |
Safe (Single mode cards only) | Green | Illuminates when the transmit laser on the port is shut off, so there is no danger in looking at the connectors. |
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