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Optical Inline Amplifier Description


The Juniper Networks Optical Inline Amplifier is a fixed stand-alone erbium-doped fiber amplifier (EDFA) with dual AC or DC power supplies. The optical inline amplifier (ILA) supports bidirectional optical inline amplification. The optical ILA provides periodic amplification of a dense wavelength-division multiplexing (DWDM) signal to enable long-distance transmission as it propagates along the fiber . The optical ILA is typically placed between 50 miles (80 km) and 62 miles (100 km) apart along the length of the fiber. The optical ILA is used in conjunction with the integrated photonic line card (IPLC) that is installed in the Juniper Networks PTX3000 Packet Transport Routers.. The optical ILA connects to the IPLC through the LINE IN and LINE OUT LC port connectors on the front panel. It also connects to other optical ILAs through the LC port connectors.

The optical ILA operates with redundant hot-swappable pluggable power supplies that are either AC or DC. The optical ILA can be managed by using Connectivity Services Director (CSD), or by using the CLI console commands . The optical ILA does not support the Junos operating system (Junos OS).

Figure 1 shows an E-Line configuration with the optical ILA and IPLC.

Figure 1: E-Line Configuration
E-Line Configuration

In this example, the optical ILA is connected to the IPLC in the PTX3000 chassis, which is connected to compatible PICs in the same chassis through the add and drop ports. The multiplexed wavelengths from the IPLC are amplified and transmitted in a single fiber toward the line (through the Line OUT port on the IPLC) which is connected to the optical ILA (through the LINE IN port on the ILA). Based on the distance, you can have multiple ILAs connected. In this example, there are three ILAs to enable long-distance transmission. The amplified signals received by the IPLC in the remote chassis, are demultiplexed into individual wavelengths and sent to the respective add and drop ports (which are connected to the compatible PICs/MICs) in that PTX3000 chassis.

For more information about the IPLCs, see the PTX3000 Packet Transport Router Hardware Guide. For information about configuring the IPLCs, see the Integrated Photonic Line Card (IPLC) Feature Guide.

Front 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. Figure 2 shows the front panel of the optical ILA.

Figure 2: Optical ILA Front Panel
Optical ILA Front Panel
Status LEDs
Management (MGMT) Ethernet port
LC port connectors
Console (CON) port
USB (USB) port
On/off button (ON/OFF)
USB (USB) port

FRU Panel

The field-replaceable unit (FRU) panel of the optical ILA contains the fan modules and power supplies for the optical ILA. Figure 3 shows the optical ILA FRU panel.

Figure 3: Optical ILA FRU Panel
Optical ILA FRU Panel
Grounding points
Fan modules
ESD point
Power supplies

The cooling system in an optical ILA consists of three 12.4-W fan modules. These fan modules can be hot-swapped—you do not need to power off the optical ILA or disrupt the functioning of the optical ILA 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. Only one power supply is required to power the device, while the second power supply provides redundancy.

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