8
SBFTF10xx-11x
Tech Support:
1-800-260-1312
International:
00-1-952-941-7600
(24 hours)
Operation
Status LEDs
Use the status LEDs next to the fiber ports to monitor the media converter and
the
fiber network
connections.
F(ull) D(uplex)
On = Full-duplex connection.
Off = Half-duplex 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.
Use the bi-color twisted-pair status LEDs to monitor the
twisted-pair copper
network
connections.
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.
FD
LACT
PWR
100
The “FD” and “LACT” LEDs on the front panel refer
to
Fiber Port 1 (F1)
.
Duplex/Link Speed
10/100TX
-- Click the
“Transition Now”
link for a live Web chat.
9
Operation
-- Continued
Product Features
Full-Duplex Network
In a full-duplex network, maximum cable lengths are determined by
the type
of cables
that are used. See page 1 (front cover) for the cable specifications
for the different SBFTF10xx-11x models.
The 512-Bit Rule
does not apply
in a full-duplex network.
Half-Duplex Network (512-Bit Rule)
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.
For more information on the 512-Bit Rule, see the white paper titled “
Collision
Domains
” on the Transition Networks website at: www.transition.com
Distance Extension
The SBFTF10xx-11x 3-port bridging media converter segments up to two (2)
10Base-T copper Ethernet and/or 100Base-TX copper fast Ethernet and one
(1) 100Base-FX fiber fast Ethernet collision domains.
In a
half-duplex
Ethernet or fast Ethernet environment, the SBFTF10xx-11x
media converter extends network distances by
segmenting collision domains
so that the 512-Bit Rule applies separately to each collision domain (see page
9).
In a
full-duplex
Ethernet or fast Ethernet environment, the SBFTF10xx-11x
media converter extends network distances to the
physical cable limitations
imposed by the selected twisted-pair copper fiber cables (see pages 1 and 2).
Rate Conversion
The SBFTF10xx-11x 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.
