Juniper ACX5048 - Interface Specifications for SFP+ DAC Cables for an ACX5000 Router

Interface Specifications for SFP+ DAC Cables for an ACX5000 Router
Small form-factor pluggable plus (SFP+) direct attach copper (DAC) cables, also known
as Twinax cables, are suitable for in-rack connections between servers.
While we highly recommend using Juniper Network DAC cables, ACX5000 routers do
support third-party DAC cables. If you choose to use a third-party cable, it should meet
the specifications described in Table 37 on page 78 and Table 38 on page 80.
CAUTION: If you are having a problem running a Juniper Networks device
that is using a third-party optic or cable, the Juniper Networks Technical
Assistance Center (JTAC) can help you diagnose the source of the problem.
Your JTAC engineer might recommend that you check the third-party optic
or cable and potentially replace it with an equivalent Juniper Networks optic
or cable that is qualified for the device.
Table 36 on page 77 describes the Junos OS software releases that supports third-party
DAC cables. Prior releases only permitted Juniper Networks DAC cables.
Table 36: Third-Party SFP+ DAC Cable Support
Third-Party DAC Cable Support AddedPlatform
Junos OS 15.1X54-D20ACX5000 as a standalone router
The cables are hot-removable and hot-insertable. A cable consists of a cable assembly
that connects directly into two SFP+ modules, one at each end of the cable. The cables
use integrated duplex serial data links for bidirectional communication and are designed
for data rates up to 10 Gbps. There are two types of DAC cables:
•
Passive DAC cables have no signal amplification built into the cable assembly.
Table 37 on page 78 describes the passive DAC cable specifications.
•
Active DAC cables have signal amplification and equalization built into the cable
assembly. Table 38 on page 80 describes the active DAC cable specifications.
77Copyright © 2015, Juniper Networks, Inc.
Chapter 7: Port and Interface Specifications