Allied Telesis AT-PC2002/POE - Manual (Page 23)

AT-PC2002/POE Media Converter Installation Guide
23
respond by pulsing the transmitter on the twisted pair port and flashing the
port’s Link LED about once a second to signal that the failure originated on
the fiber optic port. When the connection is reestablished on the fiber optic
port, the twisted pair port would automatically resume normal operations to
permit the two ports to forward traffic again.
The operating mode functions the same if the failure starts on the twisted
pair port. Here, the mode pulses the transmitter on the fiber optic port.
As with the other operating modes, this mode does not interfere with the
flow of network traffic through the ports of a media converter during normal
network operations of a media converter. However, Allied Telesis
recommends limiting its use to diagnosing link failures, particularly if the
network devices connected to the ports are managed devices. The pulsing
of the transmitter on a port and the constantly changing status of a link
could prove problematic for some managed devices. For example, the
device might send a constant stream of SNMP traps or, if the device is
running a spanning tree protocol, the protocol might become confused as
the status of the device’s link to the media converter constantly changes.
Setting the
Operating Mode
You set the operating mode with the Mode button on the front panel of the
unit. Setting the mode does not interrupt the flow of network traffic through
the device. To set the operating mode, use a pointed object such as a pen
to depress the Mode button.