Optical ILA Chassis Status LEDs
The optical ILA has five status LEDs on the front panel of the chassis (see Figure 1)—two Optical Supervisory Channel status LEDs (OSC A and OSC B), a system status LED (SYS), an alarm LED (ALM), and a power LED (PWR) The OSC is a separate channel that carries overhead information for network management purposes. The OSC, which is an important section in every DWDM system, carries voice and data between sites for monitoring and controlling specifications in the system.
1 — OSC B (OSC B) LED | 4 — Alarm (ALM) LED |
2 — OSC A (OSC A) LED | 5 — Power (PWR) LED |
3 — System status (SYS) LED |
Table 1 describes the chassis status LEDs on an optical ILA.
Name |
Color |
State |
Description |
|---|---|---|---|
OSC A status (OSC A) LED |
Unlit |
Off |
The power is off. |
Red |
On steadily |
No OSC signal is received from the downstream device. |
|
Amber |
On steadily |
OSC signal received from the upstream device indicates a fault. |
|
Green |
On steadily |
OSC signal is communicating normally. |
|
OSC B status (OSC B) LED |
Unlit |
Off |
The power is off. |
Red |
On steadily |
No OSC signal is received from the downstream device. |
|
Amber |
On steadily |
OSC signal received from the upstream device indicates a fault. |
|
Green |
On steadily |
OSC signal is communicating normally. |
|
System status (SYS) LED |
Unlit |
Off |
The power is off, or the optical ILA is not connected to any power source. |
Green |
On steadily |
The optical ILA software has booted. |
|
Green |
Blinking |
The optical ILA is active and is communicating with upstream and downstream network elements. |
|
Alarm (ALM) LED |
Unlit |
Off |
The optical ILA is off, or there is no alarm. |
Red |
On steadily |
A major hardware fault has occurred, such as a temperature alarm or a power or pump failure, and the unit has halted. The CLI is still accessible. |
|
Amber |
On steadily |
A minor alarm has occurred, such as a software error. |
|
Green |
Solid |
The optical ILA is operating properly. |
|
Power (PWR) |
Unlit |
Off |
The optical ILA is powered off or there is no power to the device. |
Amber |
On steadily |
The optical ILA is powered by a single power supply. The second power supply is either missing or not connected to a power source. |
|
Green |
On steadily |
The optical ILA is powered with two redundant power supplies. |