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903-0623-00 Rev. A
6.2
EIB-10/100 Ethernet Interface Board
Card P/N 903-5044-XX
The EIB-10/100 Ethernet Interface Board provides three RJ-45 ports of 10Base-T (10 Mbps) or
100Base-TX (100 Mbps) Ethernet inputs to an internal switching hub (switch). Each port auto-negotiates
the data rate and duplex mode of the input.
The EIB-10/100 Ethernet Board is available in two versions, one is electrical and the other is optical. This
section provides information about the optical version of the EIB-10/100. For information about the
electrical version of the card, refer to section 5.5. A front panel view of the card in Figure 6.2-1 shows pin
and LED locations on the RJ-45 jacks.
Unlike simple repeating hubs, which copy all incoming packets on one port to all other ports, switching
hubs have the ability to store and forward packets while controlling the flow of packets through each port
independently. Unicast packets are forwarded to only one port, greatly improving network efficiency.
The optical version of the EIB-10/100 may be installed in any data card slot or in a standalone mode with
a small enclosure. The optical link itself is full-duplex 100Base-FX Ethernet protocol, which operates
collision free over long fiber links of up to 10 km or more, limited only by optical power budget. This card
operates on its own set of optical wavelengths. Typically, the cards use CWDM wavelengths to allow
integration on the same fiber used by the FMB-X-2.5 cards, though they may also be run over separate
fibers using standard 1310/1550 nm wavelengths.
Focal Technologies Corp.
GREEN LED
OFF = NO LINK
ON = LINK
FLASHING = ACTIVITY
PIN 1
PIN 8
AMBER LED
OFF = HALF-DUPLEX, NO COLLISION
ON = FULL DUPLEX
FLASHING = COLLISION
Figure 6.2-1: EIB-10/100 Front Panel
Model 903 User's Guide, FMB-X-2.5 Version
EIB-10/100
Page 6-5
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