Juniper Networks G10 CMTS manual Chassis Rear Modules, NIC Access Module LEDs

Chassis Rear Modules

•Chassis Rear Modules

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•	The rear modules, in general, are designed to locate the chassis cable connections on the
•	back of the chassis rather than the front. The rear modules primarily distribute signals
•	between the functional modules in front and the cabling in the rear.
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•	This section discusses the following chassis rear modules:
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•	! NIC Access Module on page 48
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•	! HFC Connector Module on page 50
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•	! Switched I/O Module on page 53
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•	! Hard Disk Module on page 55
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•NIC Access Module

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•	The NIC Access Module contains a 6 U (267 mm) x 80 mm card with a 4 HP (20 mm),
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	single-wide rear panel. The module installs from the rear of the chassis and is hot-swappable.
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	There must be one NIC Access Module opposite each NIC Module.
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•	The NIC Access Module passes the network traffic through the midplane as Fast Ethernet
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	frames to and from the NIC Module. The module has two RJ-21 connectors. A NIC Access
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	Module cable plugs into each connector and fans out to 12 individual lines with RJ-45
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	connectors. Eight of the RJ-45 connectors from the NIC Access Module cable plugged into
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	connector 1 mate with the HFC Connector Modules or SIMs within the same chassis domain.
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	The NIC Access Module cable plugged into connector 2 provides four RJ-45 connectors that
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	are the Fast Ethernet interfaces. See “HFC Connector Module” on page 50 and “Switched I/O
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	Module” on page 53 for more discussion and an illustration of the data flow path.
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•	Table 22 describes the functions of the NIC Access Module LEDs. Figure 17 on page 49 shows
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	the NIC Access Module rear panel.
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•Table 22: NIC Access Module LEDs

•	LED	Color	Function
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•	POWER	Green	ON—Power is applied to the module.
•	OPERATIONAL	Green	ON—Initialization successfully completed.
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	INT FAULT	Green	ON—Failure detected in the module.
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	EXT FAULT	Amber	ON—One or more of the Fast Ethernet or Gigabit
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			Ethernet ports is enabled, but unused.
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48 JUNOSg 3.0 G10 CMTS Hardware Guide