Black Box LMM101A, Руководство пользователя

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FiberAlert minimizes the problems associated with the loss of one strand of fiber. If a
“receive” strand is unavailable, the IE Managed Miniature Media Converter notes the
lost link and will stop transmitting data and the link signal on the fiber-optic link
until a signal or link pulse is received. The result is that the link LED on both sides
of the fiber connection will go out, indicating a fault somewhere in the fiber loop.
Using FiberAlert, a local site administrator is notified of a fault and can quickly
determine the location of a cable fault.
WARNING:
Enabling FiberAlert at both ends of a fiber line will cause that fiber line to lock-up when a failure
condition occurs.
NOTE: FX/TX LinkLoss and FiberAlert events can appear as link errors to users who are unaware of
the presence of these features.
Loopback Testing
The IE Managed Miniature Media Converter includes Loopback testing functionality,
which loops back all frames arriving on the optics port (except for the device’s
management traffic). When in Loopback mode, the IE Managed Miniature Media
Converter drops the link on the twisted pair port.
Another form of Loopback testing, called Src/Dest (Source/Destination) Address
Swap, swaps the frame’s MAC Address. This is set from the Unit screen in the
serial/Telnet session or from iView². (This can cause a frame with a multicast source
address to be created, which violates the IEEE standard. Select only clear multicast
bits.) For more information, see the Unit Control Settings section or consult the
iView² online help.
Serial Configuration/Telnet Session
The following are instructions for serial configuration (including VLAN
configuration) and using Telnet sessions. Information about DHCP and iView² is also
provided at the end of this section.
To log onto the unit through the serial port, connect a PC to the IE Managed
Miniature Media Converter using the included adapter. Set the computer for VT-
100 emulation, with the following settings:
38.4K baud , 8 data bits , 1 stop bit , no
parity , no flow control .
Enter the User Name and Password as admin (which is the default setting), when
connecting through Telnet/Hyperterminal. A new User Name and Password should
be set after signing on the first time.
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