Redundant Ports; The Next Step - Juniper E Series Hardware Manual

ERX 7.0.x Hardware Guide
Figure 38: X.21/V.35 Module with 50-Pin X.21/V.35 Connector

Redundant Ports

Some modules have redundant ports. See the E-series Module Guide for
specifications. Cabling both ports provides a redundant path to the E-series module.
CAUTION: For port redundancy to operate correctly on a GE I/O module that
supports SFPs, both the primary and redundant ports on an E-series GE I/O module
must use the same type of SFP.

The Next Step

Turn to "Powering Up E-series Routers" on page 71.
70

The Next Step

X.21/V.35
I/O
Port 0