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
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.
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
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.
The front panel of the optical ILA contains six LC port connectors,
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
LC port connectors
On/off button (
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.
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.