Instruction manual

Installing media converters without understanding the effects of
FiberAlert can cause perfectly functioning units to appear flawed or
even dead!
If you are unfamiliar with Pulsing FiberAlert and LinkLoss, Black Box strongly
encourages you to read the following information. Contact Black Box technical
support for more information and assistance.
A BOUT L INK I NTEGRITY
During normal operation, link integrity pulses are transmitted by all
point-to-point Ethernet devices. When an Black Box media converter
receives valid link pulses, it knows that the device to which it is connected
is up and sending pulses, and that the copper or fiber cable coming from
that device is intact. The appropriate “LINK” LED is lit to indicate this. The
Black Box media converter also sends out link pulses from its copper and
fiber transmitters, but normally has no way of knowing whether the cable
to the other device is intact and the link pulses are reaching the other end.
The combination of FiberAlert and LinkLoss allows this information to be
obtained, even when physical access to a remote device (and its link integri-
ty LED) is not available.
W HAT I S FO LINKL OSS?
FO LinkLoss is a troubleshooting feature. When a fault occurs on the fiber
segment (receive side) of a conversion, FO LinkLoss detects the fault and
passes this information to the twisted pair segment. If a media converter is
not receiving a fiber link, FO LinkLoss disables the transmitter on the media
converter's twisted pair port. This results in a loss of link on the device con-
nected to the twisted pair port.
W
HAT I S TP LINKL OSS?
TP LinkLoss is another troubleshooting feature. When a fault occurs on
the twisted pair segment of a conversion, TP LinkLoss detects the fault and
passes this information to the fiber segment. If a media converter is not
receiving a twisted pair link, TP LinkLoss disables the transmitter on the
media converter's fiber port. This results in a loss of link on the device con-
nected to the fiber port.
C
ONFIGURING L INKLOSS: TP LinkLoss and FO LinkLoss are always
enabled on Compact Media Converter TP/FO.
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Installation Troubleshooting
• During installation, first test your fiber and twisted pair connections with all
troubleshooting features disabled. Then enable these features, if desired, just
before final installation. This will reduce the features’ interference with testing.
• To test Compact Media Converter TP/FO by itself, you must have an appro-
priate fiber patch cable. First, connect Compact Media Converter TP/FO to
the twisted pair device with a twisted pair cable and establish valid link.
Next, loop a single strand of fiber from the transmit port to the receive port
of your media converter. Finally, verify that you have both twisted pair and
fiber link on your media converter.
• Make sure that you are using the appropriate twisted pair cable or have
the crossover/pass-through button on the media converter set correctly.
• Interconnection between the Next Generation of 10 Mbps converters
(Compact Media Converter, SNMP Manageable module or unmanaged
module) and their Legacy counterparts is possible. Where possible, how-
ever, use Legacy with Legacy product, or Next Generation with Next
Generation product.
General Information
BLACK BOX CUSTOMER SERVICE INFORMATION
Order toll-free in the U.S.: Call 877-877-BBOX
(outside U.S. call 724-746-5500)
FREE technical support, 24 hours a day, 7 days a week:
Call 724-746-5500 or Fax [phone]
Mail order: Black Box Corporation
1000 Park Drive, Lawrence, PA 15055-1018
Web site: www.blackbox.com
E-mail: [e-mail]
S PECIFICATIONS
Environmental
Operating Temperature: 32° - 104° F (0° - 40° C)
Storage Temperature: 0° - 160° F (-20° - 70° C)
Humidity: 5 - 95% (non-condensing)
Power
AC Input Load: 100/240V±10% ~ 50/60 Hz, 0.1/0.05A
Dimensions
TP/FO 1.64”H x 4.75”W x 4.95”D (4.17cm x 12.07cm x 12.57cm)
TP/BNC 1.64"H x 4.75"W x 4.54"D (4.17cm x 12.07cm x 11.53cm)
Shipping weight: 1.3 lbs. (0.6 kg)
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