Understanding How The Optical Ila Is Managed And Controlled; Figure 3: Functional Overview Of Optical Inline Amplifier - Juniper PTX3000 IPLC Features Manual

PTX3000 Integrated Photonic Line System Feature Guide

Understanding How the Optical ILA is Managed and Controlled

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Figure 3: Functional Overview of Optical Inline Amplifier

Line A Input
Line A Output
VOA_A
As illustrated in Figure 3 on page
the E_AB amplifier provides optical gain for the DWDM signals traversing the unit east
to west and the E_BA amplifier provides optical gain for the DWDM signals traversing the
unit west to east.
There are two independent optical paths on the optical ILA:
Line A Input to Line A Output
Line B Input and Line B Output
Channels, shown as green arrows in
amplified by E_AB, a variable gain erbium-doped fiber amplifier (EDFA), attenuated by
VOA_B, a variable optical amplifier (VOA), and transmitted out Line B Output. Channels
received at Line B Input are amplified by a second variable gain EDFA (E_BA), attenuated
by VOA_A, and transmitted out Line A Output.
For OSC communications, the optical ILA uses two OSC channels: OSC_A and OSC_B.
The OSC channel (shown in red arrows in
direction; OSC_A uses Line A Input and Line A Output, whereas OSC_B uses Line B Input
and Line B Output. When an OSC message is received from a downstream node on Line
A Input, the amplifier responds to the message over Line A Output. For upstream OSC
communications, Line B Input receives an OSC message and responds to it over Line B
Output. OSC communications are sent over an inband optical channel. Nodes can be
either an optical ILA or an IPLC module in the PTX3000 integrated photonic line system.
Figure 4 on page 13 illustrates the management, control, and communication of the
optical ILA in the amplifier chain. You can manage the optical ILA using an SNMP network
management system (NMS), Juniper Networks Connectivity Services Director over the
DMI interface, the user interface of the optical ILA, or through the Junos OS CLI.
E_AB
OSC_A OSC_B
E_BA
12, the optical ILA is functionally two separate amplifiers;
Figure 3 on page 12, received at Line A Input are
Figure 3 on page
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Line B Output
VOA_B
Line B Input
12, is bidirectional in a given