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5/4/2007
#24435
Unlike Layer 1 media converters, which only convert
one Ethernet media type to another, Layer 2 Media Converter
Modules for the High-Density Media Converter System II are
true switches — they actively store, filter, and forward
Ethernet packets like any other MAC layer switch.
Layer 2 converters increase network efficiency and reduce
network overhead, significantly increasing data throughput.
Because Layer 2 converters are also switches, they
incorporate 10/100 or 10/100/1000 ports in contrast to the
single-speed ports of Layer 1 converters. You can set the RJ-45
ports for autonegotiation or set them for 10-, 100-, or 1000-
Mbps speed as well as for half- or full duplex. The fiber port
can be set for half- or full duplex, too.
Layer 2 Media Converter modules include the LinkLoss
feature, which notifies you of “silent failures” on copper-to-
fiber links. With LinkLoss, a fault on the fiber port is mirrored
to the Ethernet twisted-pair port. If the fiber link is lost at the
converter, the converter disables the twisted-pair Link LED
so you can see at a glance that the link is down.
Twisted-pair ports feature autocrossover ports to eliminate
the worry of whether to use straight- or cross-pinned cabling.
This built-in MDI/MDI-X function determines automatically
whether the converter has to cross over between the four
pairs on the twisted-pair port’s RJ-45 connector.
10BASE-T/100BASE-TX to 10BASE-FL/100BASE-FX
Use a pair of 10BASE-T/100BASE-TX to 10BASE-FL/100BASE-
FX converters at opposite ends of a fiber optic link to increase
your fiber reach. Because they support both Ethernet and Fast
Ethernet, these media converters are perfect for a network
that includes both standards.
The copper ports autonegotiate speed and duplex;
the fiber ports operate at the speed of the copper port.
10BASE-T/100BASE-TX to 100BASE-FX
These converters feature an autosensing 10/100 copper
port and a 100-Mbps fiber port. They’re a good choice for
remote Fast Ethernet connections to Ethernet devices that
may later be upgraded to Fast Ethernet.
10BASE-T/100BASE-TX to 100BASE-FX, Single Strand
Get more mileage from your fiber cable. These modules
extend Fast Ethernet connections over a single strand of fiber
cable by compressing the transmit and receive wavelengths
into
one
single-mode fiber strand.
The conversion is done with Wave-Division Multiplexing
(WDM) technology. WDM technology transmits two signals
simultaneously at different wavelengths on the same fiber.
One unit transmits at 1550 nm and receives at 1310 nm.
The other unit transmits at 1310 nm and receives at 1550 nm.
The two wavelengths operate independently and don’t
interfere with each other. This bidirectional traffic flow
effectively converts a single fiber into a pair of “virtual
fibers,“ each driven independently at different wavelengths.
The copper port is autosensing for speed; the fiber port
is Fast Ethernet.
10BASE-T/100BASE-TX/1000BASE-T to 1000BASE-SX
Choose these short-range modules for Gigabit Ethernet
connections of up to 300 meters (984.3 ft.). Autosensing
10-/100-/1000-Mbps ports on the copper side provide
maximum versatility.
10BASE-T/100BASE-TX/1000BASE-T to 1000BASE-LX
For longer Gigabit fiber runs, choose 1000BASE-LX Gigabit
Ethernet modules, which achieve blazing Gigabit throughput
at distances of up to 40 or 70 kilometers (24.9 or 43.5 mi.) over
single-mode fiber cable. The copper port supports Ethernet,
Fast Ethernet, and Gigabit Ethernet and automatically
autonegotiates speed and duplex.
10BASE-T/100BASE-TX/1000BASE-T to
1000BASE-SSLX
Send Gigabit Ethernet at distances of up to 80 kilometers
(49.7 mi.) over a single fiber strand. Maximum fiber utilization
plus autosensing 10/100/1000 ports make this an extremely
versatile choice for your fiber infrastructure.
LAYER 2 MEDIA CONVERTER MODULES
724-746-5500
blackbox.com
