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The following table provides an overview of the troubleshooting features, their
functionality and the recommended settings for a pair of media converters in a
typical central/main site to remote site application:
W
H A T
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P
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?
Use
Pulsing FiberAlert
in the following two situations:
A)
When connecting two
Compact Media Converters
(or connecting one to
a
100 Mbps Media Conversion
module) with
FiberAlert
enabled.
B)
When connecting one
Compact Media Converter
with
FiberAlert
enabled
and one
Compact Media Converter 10/100
unit with
Link Fault Detection
(LFD) enabled.
NOTE: Pulsing FiberAlert may be useful when connecting Compact Media Converter to another manu-
facturer’s product that has a similar feature to FiberAlert.
NOTE: Please refer to the Compact Media Converter 10/100 Installation Guide for more information on LFD.
Auto-Negotiation on Compact Media Converter
Compact Media Converter
includes
Auto-Negotiation
. When
Auto-Negotiation
is enabled (default), the media converter negotiates as a 100 Mbps Full-Duplex
device; if the device the
Compact Media Converter
is connected to can operate
at 100 Mbps Full-Duplex, a link will be established.
If the twisted pair port on the other device does not have the ability to auto-negoti-
ate, or if a 100 Mbps Half-Duplex connection is desired,
Auto-Negotiation
on
Compact
Converter 1
Converter 2
FiberAlert Enabled
FiberAlert and Pulsing FiberAlert Enabled
FiberAlert Enabled
FiberAlert Disabled
NOTE
FiberAlert is not available/applicable on single-strand fiber versions of Compact Media Converter.
I
NSTALLATION
T
IP
!
Enable
FiberAlert on only ONE side of a media conversion; enabling it on both sides will keep both
transmitters off indefinitely. If you want to enable
FiberAlert on BOTH sides of the conversion, you
MUST also enable
Pulsing FiberAlert on one unit. Black Box recommends enabling Pulsing
FiberAlert on ONE side (see below).
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Feature
Fault Location
Disabled LEDs
Enable At:
FX LinkLoss
Fiber
Twisted Pair
Main Site Only
TX LinkLoss
Twisted Pair
Fiber
Remote Site Only
FiberAlert
Fiber
Fiber
Remote Site Only*
5
4
Media Converter
must be disabled. Half- and Full-Duplex settings must be manual-
ly set and match on both devices to which
Compact Media Converter
is connected.
The diagram below shows a typical application, followed by a table with
three possible configurations.
If you are unsure of how best to implement this feature in your configuration,
please contact Black Box Technical Support.
LED Operation
Compact Media Converter
features four diagnostic LEDs. The diagram below
shows the location of the unit’s LEDs.
The LED functions are:
FFXX RRC
CVV
Glows yellow when module is receiving data.
TTXX LLN
NKK
Glows green when a twisted pair link is established.
FFAA
Glows green when
FiberAlert
is enabled. Blinks green when
a
FiberAlert
situation occurs (i.e. the loss of one strand of fiber).
NOTE: FiberAlert is not available/applicable on single-strand fiber versions of Compact
Media Converters.
FFXX LLN
NKK
Glows green when a fiber link is established.
RCV
XMT
MM850
100 Mbps
FX RCV
FX LNK
TX LNK
FA
724-746-5500
Compact
Media Converter
