Optical Ila Chassis Status Leds - Juniper PTX3000 Hardware Manual

Figure 7: Optical ILA FRU Panel
1 Grounding points
—
2 ESD point
—
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
on page 29, "Optical ILA AC Power Supply Description" on page
Description" on page 32.

Optical ILA Chassis Status LEDs

The optical ILA has five status LEDs on the front panel of the chassis (see
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.
3 Fan modules
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4 Power supplies
—
"Optical ILA Cooling System Description"
31, and "Optical ILA DC Power Supply
Figure 8 on page
24
25)—two optical