6
SFMFFxxxx-2xx
24-hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
Installation
Install the fiber cable
CAUTION:
Both connections
(Port 1 and Port 2)
to the SFMFFxxxx-2xx media
converter must be of the same network speed and network protocol. Failure to
observe this caution will cause data transfer to fail.
1.
Locate or build IEEE 802.3™ compliant fiber cable with male, two-
stranded TX to RX connectors installed at both ends.
2.
Connect the fiber cables to the SFMFFxxxx-2xx media converter as
described:
•
Connect the male TX cable connector to the female TX port.
•
Connect the male RX cable connector to the female RX port.
3.
Connect the fiber cables to the other device
(another media converter,
hub, etc.)
as described:
•
Connect the male TX cable connector to the female RX port.
•
Connect the male RX cable connector to the female TX port.
Connec
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ect the fi
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RX
TX
RX
TX
Power the Media Converter
AC:
1.
Install the power adapter cord to the back of the media converter.
2.
Connect the power adapter plug to AC power.
3.
Verify that the media converter is powered by observing the illuminated
LED power indicator light.
DC:
Consult the user’s guide for the Transition Networks SPS1872-xx DC external
power supply for powering the media converter.
7
[email protected] -- Click the “Transition Now” link for a live Web chat.
Delay times
Network worst-case delay through the SFMFFxxxx-2xx media converter:
623 Mbps - 1 Gbps
1 nsec
156 Mbps - 622 Mbps
2 nsec
125-155 Mbps
3 nsec
<125 Mbps
7 nsec
For example in Ethernet environments, ensure that the network conforms to
the 512-bit Rule by using the above numbers to determine the bit-time delay:
s
e
m
i
t
t
i
b
4
.
0
-
=
:
t
e
n
r
e
h
t
E
s
p
b
M
5
2
1
=
(1/125Mbp
s
)
3 n
s
ec
3 n
s
ec
8 n
s
ec
Operation
Status LEDs
Use the status LEDs to monitor media converter operation in the network.
PWR:
On = Connection to external power.
LKS:
On = Single mode fiber link is up.
LKM:
On = Multimode fiber link is up.
Link Pass-Through
The Link Pass-Through feature allows the media converter to monitor RX
(receive) ports for loss of signal. In the event of a loss of an RX signal on one
media port, the media converter will automatically disable the TX (transmit)
signal of the other media port, thus “passing through” the link loss.
LKS LKM
PWR
Multimode
Single Mode
Port 2
Port 1
TX
RX
TX
RX
4
1
Media
Converter A
Media
Converter B
Near-End
Device
Far-End
Device
original fault
on the copper link
media converter B
disables the copper link
media converter A
disables the fiber TX link
3
2
media converter B
loses the fiber RX link
