Optical ILA Chassis
Optical ILA Chassis Description
The optical ILA chassis is a rigid sheet metal structure that houses all the other hardware components. The chassis measures 1.72 in. (4.36 cm) high, 9.6 in. (24.4 cm) deep, and 17.24 in. (43.8 cm) wide. The chassis can be installed in racks or cabinets.
Optical ILA Front Panel and FRU Panel
The front panel of the optical
ILA contains six LC port connectors, the ON/OFF
button, the console and management ports, the system
status LEDs, and the USB ports. The field-replaceable unit (FRU) panel
of the optical ILA contains the fan modules and power supplies for
the optical ILA.
Front Panel
Figure 1 shows the front panel of the optical ILA.

1 — Status LEDs | 5 — Management ( MGMT ) port |
2 — LC port connectors | 6 — Console ( CON ) port |
3 — USB ( USB ) port | 7 — On/off button ( ON/OFF ) |
4 — USB ( USB ) port |

1 — Output line A—for example, east to west direction ( LINE A OUT ) | 4 — Input line B ( LINE B IN ) |
2 — Input line A (LINE A IN) | 5 — Monitor output line B ( MON B OUT ) |
3 — Output line B–for example, west to east direction ( LINE B OUT ) | 6 — Monitor output line A ( MON A OUT ) |
The LC ports on the optical ILA have line interfaces toward
the optical network (LINE IN
and LINE
OUT
). The optical ILA is bidirectional—with directions
east to west and west to east. There are two optical ports per direction
(two LINE IN
ports, two LINE OUT
ports, and two (MON
) ports for monitoring).
See Figure 2.
FRU Panel
Figure 3 shows the FRU panel on the optical ILA.

1 — Grounding points | 3 — Fan modules |
2 — ESD point | 4 — Power supplies |
The cooling system in an optical ILA consists of three 12.4-W fan modules. The fan modules can be hot-swapped—you do not need to power off the optical ILA or disrupt the optical ILA function to replace a fan module.
The optical ILA has two 150-W power supplies, either AC or DC depending on your configuration. The power supplies need to be both AC or both DC—you cannot mix AC and DC power supplies in the same chassis. Only one power supply is required to power the device, while the second power supply provides redundancy. When the optical ILA has both power supplies installed and connected to power, the device has full power redundancy. If a power supply fails or is removed, another power supply balances the electrical load without interruption. Each power supply provides 12 VDC output with a standby voltage of 12 VDC. The power supplies can be hot-swapped—you do not need to power off the optical ILA or disrupt the optical ILA function to replace a power supply.
For more information about the components on the FRU panel, see Optical ILA Cooling System Description, Optical ILA AC Power Supply Description, and Optical ILA DC Power Supply Description.
Optical ILA Chassis Status LEDs
The optical ILA has five status
LEDs on the front panel of the chassis (see Figure 4)—two optical supervisory
channel (OSC) 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, is a separate channel that carries overhead information
for network purposes. For instance, it carries data between sites
for monitoring and controlling specifications in the system.

1 — OSC B status ( OSC B ) LED | 4 — Alarm ( ALM ) LED |
2 — OSC A status ( OSC A ) LED | 5 — Power ( PWR ) LED |
3 — System status ( SYS ) LED |
Table 1 describes the chassis status LEDs on an optical ILA.
Table 1: Optical ILA Chassis Status LEDs
Name | Color | State | Description |
---|---|---|---|
OSC A status ( | 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 ( | 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 ( | 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 ( | 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 ( | 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. |
Optical ILA Management Panel
The optical ILA management panel is found on the front panel (see Figure 5).

1 — RJ-45 console port ( CON ) to support
RS-232 serial ports. | 3 — USB port ( USB ). Debug only. |
2 — RJ-45 (1000BASE-T) management Ethernet port ( MGMT ). | 4 — USB port ( USB ). Debug only. |
You manage the optical ILA by using the command-line interface (CLI), which is accessible through the console and out-of-band management ports on the management panel. In addition, the front panel has system status LEDs (see Table 4 in Optical ILA Chassis Status LEDs) that alert you to minor or major alarms or other issues with the amplifier. Figure 5 shows the management panel in detail.
You can also manage the optical ILA through Connectivity Services Director (CSD), which is a Junos Space application developed to manage the optical functionality provided by optical ILAs and integrated photonic line cards (IPLCs) that are installed in the PTX3000 routers. CSD is managed over a data communications network (DCN). CSD presents a topological network view in an intuitive, comprehensive, and cohesive manner that enables you to visualize optical sites, links, and services and a site view that provides status, configuration, alarms/faults, and performance monitoring functionality on the optical interfaces. By using CSD, you can perform the following tasks on an optical ILA:
View the optical interface specifications that are currently applied on the device, such as wavelength and power.
Modify the existing parameters of the optical port to suit your network needs or resolve any alarms caused by certain interface settings.
View the active alarms generated for the optical interface to analyze and resolve the condition that triggered the alarm on the device.
Configure threshold crossing alarms (TCAs) for the optical interface.
View the performance monitoring details in statistical and graphical formats for the optical interface.
See the Connectivity Services Director User Guide for more information.
See also
Optical ILA Management Port LEDs
The management port—labeled MGMT
—on
the optical ILA is located on the management panel.
The management port is an Ethernet port that supports an RJ-45 connector and has separate LEDs for status and activity. Figure 6 shows the location of the LEDs.

1 — Link | 2 — Status |
Table 2 describes the RJ-45 management port LEDs.
Table 2: Optical ILA RJ-45 Management Port LEDs
LED | Color | State | Description |
---|---|---|---|
Link | Unlit | Off | No link is established, there is a fault, or the link is down. |
Yellow | Blinking | A link is established, and there is link activity. | |
Status | Unlit | Off | Link is down. |
Green | On steadily Blinking | Link is up. There is data activity. |