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SBFTF10xx-12x
24-hour Technical Support: 1-800-260-1312 -- International: 00-1-952-941-7600
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 = 10Mb/s operation.
Green = 100Mb/s operation.
1
0
FD
LACT
PWR
The “FD” and “LACT” LEDs near the bottom of the media
converter refer to Fiber Port 1 (F1).
Duplex/Link Speed
10/100TX
techsupport@transition.com -- 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 pages 1 and 2 for the cable specifications for the
different SBFTF10xx-12x 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-12x 6-point bridging media converter segments up to five (5)
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-12x
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-12x
media converter extends network distances to the physical cable limitations
imposed by the selected twisted-pair copper fiber cables (see pages 1 and 2).