Juniper Networks E-Series manual Combinations of Line Modules

5-4

CHAPTER 5 Installing Modules

Slot Groups for the ERX-7xx Models

A slot group in an ERX-7xx model comprises one slot or two adjacent slots. The groups for an ERX-7xx model consist of the following slots (Figure 5-3):

•Slot group 1 – slots 2 and 3

•Slot group 2 – slot 4

•Slot group 3 – slot 5

•Slot group 4 – slot 6

Slots 0 and 1 are reserved for the SRP modules.

.

	6	OC3
slots	5	CE1E3 ATM
	3
Chassis	4
	2	SRP
		CE1
	1

0

SRP

Figure 5-3ERX-7xx model slot groups

Slot group 4

Slot group 3

Slot group 2

Slot group 1

g013744

Combinations of Line Modules

For information about allowed combinations of line modules, see E-Series System Basics Configuration Guide, Chapter 5, Managing Line Modules and SRP Modules.

OC48 Line Modules

The ERX-1440 router with the SRP-40G+ SRP module supports OC48 line modules. Other E-series routers do not support OC48 line modules.

An OC48 line module spans two slots in an ERX-1440 router. You can install this line module only in slots 2–3 and slots 4–5. Other slots in the system do not support this line module.

The corresponding OC48 Frame APS I/O module spans only one slot. Install the I/O module in the lower of the slots (either slot 2 or slot 4) that the line module spans.