Example1:
In a typical application, a Switch is needed to provide a Fast Ethernet
departmental backbone. The 4K24F consists of twenty-two high-speed LAN segments,
each operating over 100Mb full-duplex RJ-45 lines. In addition, two fiber backbone
segments interconnect with the network center. The Switch needs to provide high-speed
switching support for two central servers, for a 100Mb connection to a router, and to a
mix of 10 and 100Mbps local workgroups of over a dozen users, printers, etc.
The RFL 3000 4K24F, equipped with two 100Mb fiber ports and 22 RJ-45 10/100 ports,
provides an economical solution in a rack-mount box. No Media Converters are needed.
The two-port Fiber FKM can be selected to provide the 100Mbps fiber connector type
desired. FKMs with either multi-mode or single-mode fiber types are available. The fiber
interconnects provide switched ports for fiber distances with high bandwidth.
The requirement for connecting local devices over twisted pair cabling is handled
by the RFL 3000 4K24F with 22 RJ-45 ports.
Since 100Mb fiber Ethernet has severe distance limitations at half-duplex, it is
necessary in high speed backbones to operate fiber links in the full-duplex mode. Many
low-end switches that only have RJ-45 N-way 10/100Mb ports would need to have a
media converter on each fiber line. But many media converters do not support auto-
negotiation and would not enable the fiber backbone lines to operate full-duplex. But the
RFL 3000 4K24F . . . with the optional two switched fiber ports at 100Mb speed, with
full-duplex mode as a default setting on fiber ports, and with a large batch of RJ-45 N-
way 10/100Mb ports as well. . . handles this application readily.
Router
2X 4X 6 8
10 12 14 16 18 20 22 24
1 X 1 3 5 7
9 11 13 15 17 19 21 23
Magnum 4024F Switch
100M
Col/FDX
Link/Act
Power
100M
Col/FDX
Link/Act
TX X
TX RX
Tx Rx
U PLI NK
F
H
= X
2SW
U PLINK
3 4 5 6 7 8
1SW
Magnum DS80F Dual Speed
Personal Hub
POR TS
1SW 2SW 3 4 5 6 7 8
Link/Act
Speed
F/H
Power
Error
Figure 2.4b: The RFL 3000 4K24F provides 10/100Mb speed with high bandwidth
and fiber interconnects for a departmental LAN
Example 2:
In another situation for a small office, a central Switch is needed to provide
for a 24-segment 100Mb Fast Ethernet LAN with switched copper support for 3 high
speed local servers for different departments, and with 15 segmented users and three
printers. In addition, the router and 3 ports are for future expansion.
GARRETT
12V , 1.5Am ps
10
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