Allied Telesis AT-MMC1000/SP, Руководство по установке

Страница: 41 / 50

AT-MMC1000 Mini Switching Media Converter Installation Guide
41

Verify that the operating specifications and wave lengths of the
fiber-optic port on the SFP transceiver and the remote end-node
are compatible.

Verify that the correct type of fiber-optic cabling is being used.

Verify that the wavelength between the media converter and end
node matches, and the media converter fiber port is connected to a
multi-mode (not single-mode) port on the end node.

Verify that the port is connected to the correct fiber-optic cable.
This is to eliminate the possibility that the port is connected to the
wrong remote end-node, such as a powered-off device.

Try connecting another end node to the fiber-optic port using a
different cable. If the port is able to establish a link, then the
problem is with the cable or with the other end node.

If the remote end-node is a management device, use its
management firmware to determine whether its port is enabled.

Test the attenuation on the fiber-optic cable with a fiber-optic tester
to determine whether the optical signal is too weak (sensitivity) or
too strong (maximum input power).
Problem 6: Network performance between the twisted-pair port on the
media converter and an end node is slow.
Solution:
There might be a duplex mode mismatch between the port and
the end node. This occurs when a twisted-pair port using Auto Negotiation
is connected to a device with a fixed duplex mode of full duplex. If this is
the cause of the problem, adjust the duplex mode of the port on the end
node or on the media converter so that both ports are using the same
duplex mode.