Specifications

Hardware Reference 39
C613-03084-00 REV A
Display Approximate Cable Length
To display the approximate cable length used by Gigabit Ethernet RJ-45 ports,
use the command:
show switch port
The AT9924T and AT9924T/4SP switches support this feature.
For the port or ports specified, the Cable Length parameter displays the
approximate cable length used by the port in meters. Possible Cable Length
parameter values are:
■ <50m
■ 50-80m
■ 80-110m
■ 110-140m
■ >140m
■ - (either the port link is down, or the port is operating at either 10Mbps or
100Mbps)
Cable Length is only reported for Gigabit Ethernet RJ-45 ports after the link is
established.
Test Facility
This section introduces the Test Facility. The Test Facility is built into all
AT-9900 Series software. How to operate the Test Facility is described in detail
in the Test Facility chapter of the AT-9900 Series Software Reference.
Any interfaces under test are dedicated to the Test Facility. Think of the Test
Facility as a specialised interface module like PPP or Frame Relay.
Note Before you use the Test Facility, disable any configurations with the
command set configuration=none and restart or reboot the switch.
How to test Ethernet LAN ports
A crossover cable is required to run an Ethernet LAN test. How to make a
suitable cable is described in “Useful Cables” on page 19. To start the test, loop
a four-pair crossover or straight-through cable between any two RJ-45 ports
and enter:
enable test int=all
All interfaces connected by crossover cables are tested. Test results are
displayed with the command:
show test