The SBFTF10xx-10x 2-port Ethernet/fast Ethernet
bridging media converter connects 10Base-T
Ethernet or 100Base-TX fast Ethernet twisted-pair
copper network devices to network devices on a
100Base-FX fast Ethernet fiber network.
Part NumberPort One - Copper
10Base-T/100Base-TX
SBFTF1011-100RJ-45
100 m (328 ft)*
SBFTF1013-100RJ-45
100 m (328 ft)*
SBFTF1014-100RJ-45
100 m (328 ft)*
SBFTF1015-100
(long haul)
SBFTF1016-100
(extra long haul)
SBFTF1017-100
(long wave length)
SBFTF1018-100RJ-45
SBFTF1019-100RJ-45
*Typical maximum cable distance. Actual distance is dependent upon the
physical characteristics of the network installation.
RJ-45
100 m (328 ft)*
RJ-45
100 m (328 ft)*
RJ-45
100 m (328 ft)*
100 m (328 ft)*
100 m (328 ft)*
Port Two - Duplex Fiber-Optic
100Base-FX
ST, 1300 nm multimode
2 km (1.2 miles)*
SC, 1300 nm multimode
2 km (1.2 miles)*
SC, 1310 nm single mode
20 km (12.4 miles)*
SC, 1310 nm single mode
40 km (24.8 miles)*
SC, 1310 nm single mode
60 km (37.2 miles)*
SC, 1550 nm single mode
80 km (49.7 miles)*
MT-RJ, 1300 nm multimode
2 km (1.2 miles)*
LC, 1310 nm single mode
20 km (12.4 miles*
The chassis version of the media converter
is CBFTF10xx-10x. For more information,
see the CBFTF10xx-10x user’s guide online at: www.transition.com.
Installation . . . . . . . . . . . . . . . . . .2
Operation . . . . . . . . . . . . . . . . . . .6
Half-Duplex Network . . . . . . . . . .9
Cable Specifications . . . . . . . . . .11
Technical Specifications . . . . . . .13
Troubleshooting . . . . . . . . . . . . .13
Compliance Information . . . . . . .15
Contact Us . . . . . . . . . . . . . . . . .16
SBFTF10xx-10x
p
Part NumberPort One - CopperPort Two - Simplex Fiber-Optic
SBFTF1029-100 **RJ-45
100 m (328 ft)*
SBFTF1029-101 **RJ-45
100 m (328 ft)*
SBFTF1029-102 **RJ-45
100 m (328 ft)*
SBFTF1029-103 **RJ-45
100 m (328 ft)*
SBFTF1035-100
Long Wave length
RJ-45*
100 m (328 ft)
SBFTF1039-100RJ-45*
100 m (328 ft)*
*Typical maximum cable distance. Actual distance is dependent upon the
physical characteristics of the network. (TX) = transmit (RX) = receive
**CBFTF1029-100/101 pair or -102/103 pair should be installed in the same
network where one as local and the other is the remote converter.
SC, 1310 nm (TX)/1550 nm (RX)
single mode, 20 km (12.4 miles)*
SC, 1550 nm (TX)/1310 nm (RX)
single mode, 20 km (12.4 miles)*
SC, 1310 nm (TX)/1550 nm (RX)
single mode, 40 km (24.8 miles)*
SC, 1550 nm (TX)/1310 nm (RX)
single mode, 40 km (24.8 miles)*
SC, 1550 nm single mode, 120 km
(74.6miles)*
LC, 1300 nm multimode, 2 km
(1.2 miles)*
Installation -- Continued
Set the Configuration Switches - Continued
3. Twisted-Pair Mode
UP (Full-Duplex):
The twisted-pair cable distances are constrained by
the cable requirements (see pages 1 and 2).
DOWN (Half-Duplex):
At the 100Base-TX rate, the twisted-pair cable
distances are constrained by the 512-Bit Rule (see
page 9).
At the 10Base-T rate, the twisted-pair cable
distances are constrained by the 5-Segment Rule
(see page 10).
3
UP
Twisted-pair Full-Duplex
DOWN
Twisted-pair Half-Duplex
Installation
Set the Configuration Switches
The configuration switches are located on the side of the media converter. Use a
small, flat-blade screwdriver or a similar device to set each switch.
NOTE:
• Switches 1, 2, 3, and 5 apply to the copper port.
• Switch 4 applies to the fiber port.
• Switch 6 applies to the media converter.
1. Twisted-Pair Auto-Negotiation
UP (Enabled) - The media converter “advertises”
ALL rate and mode capabilities to the network:
• 100Mb/s full-duplex,
• 100Mb/s half-duplex,
• 10Mb/s full-duplex, and
• 10Mb/s half-duplex.
DOWN (Disabled) - The bridging media converter does not “advertise” the rate
and mode capabilities to the network. Switch #2 and switch #3 are then used to
set the twisted-pair rate and mode.
2. Twisted-Pair Rate
UP - Sets the twisted-pair rate to 100Base-TX.
DOWN - Sets the twisted-pair rate to 10Base-T.
1
UP
Twisted-pair Auto-Negotiation ON
DOWN
Twisted-pair Auto-Negotiation OFF
2
UP
Twisted-pair 100Base-TX
DOWN
Twisted-
air 10Base-T
4. Fiber Mode
UP (Full-Duplex) - The fiber cable distances are
constrained by the cable requirements (see pages 1
and 2).
DOWN (Half-Duplex) - The fiber cable distances are
constrained by the 512-Bit Rule (see page 10).
5. AutoCross
UP (Enable) - The media converter connects
automatically to either straight-through or crossover
twisted-pair copper cable.
DOWN (Disable) - Either straight-through or
crossover twisted-pair copper cable must be
installed, according to the site requirements.
6. Link Pass-Through
UP (Enable) - When Link Pass-Through is enabled, a
fault on one side of the media converter stops the
signal and data transmission on the other side.
DOWN (Disable) - When Link Pass-Through is
disabled, a fault on one side of the media converter
does not stop the signal and data transmission on
the other side.
techsupport@transition.com -- Click the “Transition Now” link for a live Web chat.
3
SBFTF10xx-10x
Installation -- Continued
Connect the Twisted-Pair Copper Cable
Ensure that the correct cable type is installed to support the highest speed and
mode of operation to be selected.
Although Category 3 cable is adequate for the 10Base-T installation, Category 5
cable is strongly recommended, since Category 3 cable can not be used for
100Base-TX installation.
10Base-T / Ethernet collision domain
•If half-duplex cable is used, refer to the 5-Segment Rule (page 10) before
installing the 10Base-T twisted-pair copper cable.
•If full-duplex cable is used, the 5-Segment Rule does not apply. The cable
lengths are constrained by the cable requirements (see pages 1 and 2).
100Base-TX / fast Ethernet collision domain
•If half-duplex cable is used, refer to the 512-Bit Rule (page 10) before
installing the 100Base-TX twisted-pair copper cable.
•If full-duplex cable is used, the 512-Bit Rule does not apply. The cable
lengths are constrained by the cable requirements (see pages 1 and 2).
NOTE: A fast Ethernet collision domain can have one one class I repeater or
two class II repeaters.
Install the Twisted-Pair Copper Cable
NOTE: The AutoCross feature allows either MDI (straight-through) or MDI-X
(crossover) cable connections to be configured automatically, according to the
network conditions.
1.Locate or build IEEE 803.2™ compliant 10Base-T or 100Base-TX cables,
with RJ-45 connectors installed at both ends.
2.Connect the RJ-45 connector at one end of the cable to the RJ-45 port on
the SBFTF10xx-10x media converter.
3.Connect the RJ-45 connector at the other end of the cable to the RJ-45
port on the other device (switch, workstation, etc.).
Installation -- Continued
Connect the Fiber Cable
100Base-FX / fast Ethernet collision domain
•If half-duplex mode is used, refer to the 512-Bit Rule (page 9) before
installing the 100Base-FX fiber cable.
•If full-duplex mode is used, the 512-Bit Rule does not apply. The cable
lengths are constrained by the cable requirements (see pages 1 and 2).
Install the Fiber Cable
1.Locate or build IEEE 803.2™ compliant 100Base-FX fiber cable with
male, two-stranded TX to RX connectors installed at both ends.
2.Connect the fiber cables to the SBFTF10xx-10x 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.
Connect fiber cable
to media converter
as shown.
RX
TX
Power the Media Converter
NOTE: The external power supply provided with this product is UL listed by
the power supply’s manufacturer.
AC
1. Connect the barrel connector on the power adapter to the media
converter’s power port (located on 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.
Consult the user’s guide for the Transition Networks SPS1872-xx DC external
power supply for powering the media converter.
techsupport@transition.com -- Click the “Transition Now” link for a live Web chat.
5
SBFTF10xx-10x
Operation
Using the Status LEDs
Use the status LEDs to monitor the media converter and the network
connections.
The “FD” and “LACT” LEDs refer to the fiber port.
F(ull) D(uplex)
On = Full-duplex fiber connection.
Off = Half-duplex fiber connection.
L(ink) ACT(ivity)
On = Fiber link connection.
Flashing = Fiber network activity.
P(o)W(e)R
On = Connection to external AC or DC power.
Duplex/Link
FD
LACT
PWR
100Base-FX
The two-color LEDs refer to the twisted-pair copper port.
Duplex/Link LED
Amber = A link on the half-duplex twisted-pair copper link.
Flashing Amber = Activity on the half-duplex copper link.
Green = A link on the full-duplex twisted-pair copper link.
Flashing Green = Activity on the full-duplex copper link.
Speed LED
Amber = 10 Mb/s operation.
Green = 100 Mb/s operation.
Speed
10/100TX
Operation -- Continued
Product Features
Rate Conversion
The media converter allows connection of 10Mb/s terminal devices on a
10Base-T legacy Ethernet copper network to 100Mb/s terminal devices on a
100Base-TX fast Ethernet copper network and/or to 100Mb/s terminal devices
on a 100Base-FX fast Ethernet fiber network.
Auto-Negotiation
The Auto-Negotiation feature allows the SBFTF10xx-10x media converter to
automatically configure itself to achieve the best possible mode of operation
over a link. The media converter broadcasts its speed (10 Mb/s or 100 Mb/s)
and duplex capabilities (full or half) to the other devices and negotiates the
best mode of operation. Auto-Negotiation allows quick and easy installation
because the optimal link is established automatically.
A scenario where the media converter is linked to a non-negotiating device is
a case where the user may want to disable Auto-Negotiation. In this instance,
the mode of operation will drop to the least common denominator between
the two devices (e.g.: 10 Mb/s, half-duplex). Disabling this feature gives the
user the ability to force the connection to the desired speed and duplex mode
of operation.
AutoCross™
When the AutoCross feature is activated, it allows either straight-through
(MDI) or crossover (MDI-X) copper cables to be used when connecting to
10Base-T or 100Base-TX devices. AutoCross determines the characteristics of
the connection and automatically configures the unit to link up, regardless if
the copper cable is MDI or MDI-X configuration. (Transition networks
recommends leaving the device in the default “enable” mode.)
Link Pass-Through
The Link Pass-Through feature allows the media converter to monitor both the
fiber and copper RX (receive) ports for loss of signal. In the event of a loss of
an RX signal (1), the media converter will automatically disable the TX
(transmit) signal (2), thus, “passing through” the link loss (3). The far-end
device is automatically notified of the link loss (4), which prevents the loss of
valuable data unknowingly transmitted over an invalid link.
techsupport@transition.com -- Click the “Transition Now” link for a live Web chat.
7
SBFTF10xx-10x
Operation -- Continued
Product Features -- Continued
Distance Extension
The SBFTF10xx-10x media converter segments 10Base-T copper Ethernet
and/or 100Base-TX copper fast Ethernet and 100Base-FX fiber fast Ethernet
collision domains.
In a half-duplex Ethernet or fast Ethernet environment, the SBFTF10xx-10x
media converter extends network distances by segmenting collision domains
so that the 5-Segment Rule (see page 10) or the 512-Bit Rule (see pages 9 and
10) applies separately to each collision domain.
In a full-duplex Ethernet or fast Ethernet environment, the SBFTF10xx-10x
media converter extends network distances to the physical cable limitations
imposed by the selected copper and fiber cables (see pages 1 and 2).
Congestion Reduction
The SBFTF10xx-10x media converter does not forward collision signals or
error packets from one collision domain to another, improving baseline
network performance. In addition, the media converter filters packets
destined for local devices, also reducing network congestion.
Optional Accessories
Part Number Description
SPS-1872-SA Optional External Power Supply; 18-72VDC Stand-Alone
Output: 12.6VDC, 1.0 A
SPS-1872-PS Optional External Power Supply; 18-72VDC Piggy-back;
Output: 12.6VDC, 1.0 A
E-MCR-0412-Slot Media Converter Rack (includes universal internal power
supply) 17 x 15 x 5 in. (432 x 381 x 127 mm)
WMBLOptional Wall Mount Brackets; Length: 4.7in. (119mm)
WMBVOptional Vertical Mount Bracket; Length: 5.0 in. (127 mm)
WMBDOptional DIN Rail Mount Bracket; Length: 5.0 in. (127 mm)
WMBD-F Optional DIN Rail Mount Bracket (flat); Length: 3.3in. (84 mm)
(sold separately)
Half-Duplex Network
512-Bit Rule - 100Base-TX or 100Base-FX
Use the 512-Bit Rule to calculate the 100Base-TX or 100Base-FX half-duplex
collision domain.
In a half-duplex network, the maximum cable lengths are determined by the
round trip delay limitations of each fast Ethernet collision domain. (A collision
domain is the longest path between any two terminal devices, e.g. a terminal,switch, or router.)
The 512-Bit Rule determines the maximum length of cable permitted by
calculating the round-trip delay in bit-times (BT) of a particular collision
domain. If the result is less than or equal to 512 BT, the path is good.
To calculate the round-trip delay for a collision domain:
1. Find the collision domain, i.e. the longest
path between any two terminal devices
(e.g., terminal, switch, and/or router).
2. Calculate the round-trip delay in bit-
times for each length of cable.
4. Determine the bit-time values for each
device (see table to the right).
3. Add the bit-time values for each length of
cable and the bit-times for each device.
NOTE: The 512-Bit Rule applies separately to each collision domain.
100Base-TX Twisted-Pair Example
In the example below, the SBFTF10xx-10x 2-Port bridging media converter
acts as a switch. In this case, the collision domain bound by the media
converter on one end and a terminal on the other.
100 meters TP
cross-over
= 111BT
media converter
= 50BT
Since the total of the bit-times in this example is less than 512 (see chart
below), the path is good.
Sum of the bit-times for the example collision domain:
Media converter= 50.0 BT
100 m TP cable(100m x 1.11 BT/m)= 111.0 BT
Two Class II hubs(2 x 92)= 184.0 BT
Two 10 m TP cables (2 x 10m x 1.11 BT/m) = 22.2 BT
Terminal= 50.0 BT
Total= 417.2 BT
10 meters TP
cross over
= 11.1BT
class II hub
= 92BT
Class I hub140 BT
Class II hub92 BT
terminal/router50 BT
1 meter TP cable1.11 BT
1 meter fiber cable 1 BT
Fast Ethernet switch 50 BT
techsupport@transition.com -- Click the “Transition Now” link for a live Web chat.
9
SBFTF10xx-10x
r
Half-Duplex Network -- Continued
100Base-TX Fiber Example
The drawing to the right
illustrates a collision domain
where two media converters
are connected via fiber cable.
Since the total of the bit-times
in this example is less than
512 (50BT + 400BT + 50BT =
500BT) the path is good.
5-Segment Rule - 10Base-T
Use the 5-Segment Rule to calculate the 10Base-T half-duplex collision
domain.
The 5-Segment rule states that a transmission path of a collision domain can
consist of no more than 5 segments. A “collision domain” and a “segment”
are defined as follows:
A collision domain is the longest path in a 10Base-T network between any
two terminal devices, e.g. a terminal, switch, or router. The SBFTF10xx-10xmedia converter is also a terminal device.
A segment is a cable connection
between any two network interfaces
within a collision domain.
10Base-T Twisted-Pair Example
The example to the right illustrates
applying the 5-Segment Rule. The cable
between each network device (media
converter, Hub, or Terminal) is
numbered as a “segment”.
Note that the longest transmission path
(from the media converter at the top to
the terminal at the bottom) is 5 segments.
Therefore, the network in this example
complies with the 5-Segment Rule.
400 meters fiber cable = 400BT
media converter
= 50BT
100 meters TP
straight-through
2
100 meters TP
straight-through
3
media converte
= 50BT
media converter
1
100 meters TP
cross-over
100 meters TP
cross-over
100 meters TP
cross-over
Cable Specifications
The physical characteristics must meet or exceed IEEE 802.3™ specifications.
Fiber Cable
Bit Error Rate: <10-9
single mode fiber (recommended):9 µm
Multimode fiber (recommended):62.5/125 µm
Multimode fiber (optional): 100/140, 85/140, 50/125 µm
The fiber optic transmitters on this device meet Class I Laser safety requirements
per IEC-825/CDRH standards and comply with 21 CFR1040.10 and
21CFR1040.11.
Copper Cable
Category 3: (Minimum requirement for 10 Mb/s operation)
Gauge24 to 22 AWG
Attenuation 11.5 dB/100m @ 5-10 MHz
Maximum Cable Distance100 meters
Category 5: (Minimum requirement for 100 Mb/s operation)
Gauge24 to 22 AWG
Attenuation 22.0 dB /100m @ 100 MHz
Maximum Cable Distance100 meters
• Straight-through or crossover twisted-pair cable may be used.
• Shielded (STP) or unshielded (UTP) twisted-pair cable may be used.
• Pins 1&2 and 3&6 are the two active pairs in an Ethernet network .
• Use only dedicated wire pairs for the active pins:
(e.g., blue/white & white/blue, orange/white & white/orange, etc.)
• Do not use flat or silver satin wire.
Straight-Through Cable
Twisted Pair #1
Twisted Pair #2
1
2
3
6
1
2
3
6
Twisted Pair #1
Twisted Pair #2
Crossover Cable
1
2
3
6
Technical Specifications
For use with Transition Networks Model SBFTF10xx-10x or equivalent.
StandardsIEEE 802.3™
Data Rate10 Mb/s, 100 Mb/s
Dimensions3.25" x 1.0" x 4.7" (83 x 25 x 119 mm)
Weight10 oz. (283 g) (approximate)
Power Consumption4.95 watts
Power Supply 12 VDC, 0.8 Amp (N. America, Europe, Japan, UK)
12 VDC, 1.25 Amp (Latin Am., Australia, N.Z., S. Africa)
(The external power supply provided with this product is
UL listed by the power supply’s manufacturer.)
MTBF426,000 hours (MIL217F2 V5.0) (MIL-HDBD-217F)
1,326,000 hours (Bellcore7 V5.0)
Packet Size:Memory: 256K bytes (2 Mbit)
Unicast MAC addresses: 4K
Maximum packet size: 1536 bytes
EnvironmentTmra*:0 to 50°C (32 to 122°F )
Storage Temp: -20 to 85°C (-4 to 185°F)
Humidity: 5 to 95%, non condensing
Altitude:0 to 10,000 feet
WarrantyLifetime
*Manufacturer’s rated ambient temperature.
The information in this user’s guide is subject to change. For the most up-to-date
information, view the user’s guide on-line at: www.transition.com.
Product is certified by the manufacturer to comply with DHHS Rule 21/CFR,
Subchapter J applicable at the date of manufacture.
CAUTION: Visible and invisible laser radiation when open. Do not stare into the
beam or view directly with optical instruments.
CAUTION: Use of controls, adjustments or the performance of procedures other
than those specified herein may result in hazardous radiation exposure.
Troubleshooting
1.Is the power LED illuminated?
NO
•Is the power cord properly installed in the media converter and at the
This equipment has been tested and found to comply with the limits for a Class A digital
device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable
protection against harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is
likely to cause harmful interference, in which case the user will be required to correct the
interference at the user's own expense.
Canadian Regulations
This digital apparatus does not exceed the Class A limits for radio noise for digital apparatus
set out on the radio interference regulations of the Canadian Department of Communications.
Le présent appareil numérique n'émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la Class A prescrites dans le Règlement sur le
brouillage radioélectrique édicté par le ministère des Communications du Canada.
European Regulations
Warning This is a Class A product. In a domestic environment this product may cause radio
interference in which case the user may be required to take adequate measures.
Achtung! Dieses ist ein Gerät der Funkstörgrenzwertklasse A. In Wohnbereichen können
bei Betrieb dieses Gerätes Rundfunkstörungen auftreten, in diesem Fäll ist der Benutzer für
Gegenmaßnahmen verantwortlich.
Attention! Ceci est un produit de Classe A. Dans un environment domestique, ce produit
risque de créer des interférences radioélectriques, il appartiendra alors à l'utilsateur de
prende les measures spécifiques appropriées.
VCCI Class 1 Compliance
This equipment is in the 1st Class category (information equipment to be used in commercial
and/or industrial areas) and conforms to the standards set by the Voluntary Control Council
For Interference by Data Processing
Equipment and Electronic Office
Machines aimed at preventing radio
interference in commercial and/or
industrial areas. When used in a
residential area or in an adjacent area
thereto, interference may be caused to
radio and TV receivers, etc. Read the
instructions for correct handling.
CAUTION: RJ connectors are NOT INTENDED FOR CONNECTION TO THE
PUBLIC TELEPHONE NETWORK. Failure to observe this caution could result in
damage to the public telephone network.
Der Anschluss dieses Gerätes an ein öffentlickes Telekommunikationsnetz in den EGMitgliedstaaten verstösst gegen die jeweligen einzelstaatlichen Gesetze zur Anwendung der
Richtlinie 91/263/EWG zur Angleichung der Rechtsvorschriften der Mitgliedstaaten über
Telekommunikationsendeinrichtungen einschliesslich der gegenseitigen Anerkennung ihrer
Konformität.