D-Link DES-3010F Command Line Interface Manual page 31

cable diag ports
Purpose
Syntax
Description
Parameters
Restrictions
Example usage:
To test ports 1-4:
DES-3026:4# cable_diag ports 1-4
Command: cable_diag ports 1-4
Perform Cable Diagnostics ...
Port
---- ------- -------------- ---------------
1
2
3
4
DES-3026:4#
DES-3000 Series Layer 2 Switch CLI Reference Manual
Used to test the copper cable. If there is an error on the cable, it can
determine the type of error and the position where the error
occurred.
cable_diag ports [<portlist>| all]
For FE port, two pairs of cable will be diagnosed.
For GE port, four pairs of cable will be diagnosed.
There are three types of cable errors Open, Short, or Crosstalk.
Open – means that the cable in the error pair does not have a
connection at the specified position.
Short – means that the cables in the error pair has a short problem
at the specified position.
Crosstalk – means that the cable in the error pair has a crosstalk
problem at the specified position.
When a port is in link-up status, the test will obtain the distance of
the cable. Since the status is link-up, the cable will not have the
short or open problem. But the test may still detect the crosstalk
problem.
When a port is in link-down status, the link-down may be caused by
many factors.
When the port has a normal cable connection, but the remote
partner is powered off, the cable diagnosis can still diagnose the
state of the cable as if the remote partner is powered on.
When the port does not have any cable connection, the result of the
test will indicate no cable.
The test will detect the type of error and the position where the error
occurs.
<portlist>  Specifies a port or range of ports to be tested.
You must have administrator privileges.
Type Link Status
FE Link Up
FE Link Down
FE Link Up
FE Link Down
Test Result
OK
No Cable
OK
No Cable
27
Cable Length (M)
----------------
50
-
110
-