Juniper ACX2000 Configuration Guide

Table 141: show diagnostics tdr Output Fields (continued)
Field DescriptionField Name
When detailed information is displayed, status for a twisted pair:
• Failed—TDR test failed on the cable pair.
• Impedance Mismatch—Impedance on the twisted pair is not correct.
Possible reasons for an impedance mismatch include:
• The twisted pair is not connected properly.
• The twisted pair is damaged.
• The connector is faulty.
• Normal—No cable fault detected for the twisted pair.
• Open—Lack of continuity between the pins at each end of the
twisted-pair.
• Short on Pair-n—A short-circuit was detected on the twisted pair.
When summary information for all interfaces is displayed, status for
the cable as a whole:
• Fault—A fault was detected on one or more of the twisted-pairs.
• OK—No fault was detected on any of the twisted pairs.
Cable status
Distance to the fault in whole meters. If there is no fault, this value is
0.
When summary information for all interfaces is displayed, this value
is the distance to the most distant fault if there is more than one
twisted pair with a fault.
Distance fault or
Max distance fault
Indicates the polarity status of the twisted pair:
• Normal—Polarity is normal. Each conductor in the twisted pair has
been connected the same pins at the both ends of the connection.
For example, a conductor connected to pin 1 at the near end of the
connection is connected to pin 1 at the far end.
• Reversed—Polarity has been reversed. For the twisted pair, the
conductors have switched which pins they are connected to at the
near and far ends of the connection. For example, the conductor
connected to pin 1 at the near end is connected to pin 2 at the far
end.
(Displayed only when the interface option is used)
Polarity swap
Difference in nanoseconds between the propagation delay on this
twisted pair and the twisted pair with the shortest propagation delay.
(Displayed only when the interface option is used.)
Skew time
Number of the 10/100BASE-T transmit/receive pair being reported
on.
Channel Pair
Indicates whether or not the twisted pairs are swapped:
• MDI—The pairs are not swapped (straight-through cable).
• MDIX—The pairs are swapped (cross-over cable).
(Displayed only when the interface option is used.)
Pair Swap
2463Copyright © 2017, Juniper Networks, Inc.
Chapter 42: Operational Commands

Juniper ACX2000 Specifications

General

Brand	Juniper
Model	ACX2000
Category	Network Router
Language	English