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903-0623-00 Rev. A
5.5
EIB-10/100 Ethernet Board (Electrical Version)
Card P/N 903-5044-00
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 electrical version of the EIB-10/100. For information about the
optical version of the card, refer to section 6.2. A front panel view of the card in Figure 5.5-1 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 EIB-10/100 card (electrical version) must be installed in a high speed data slot. All data slots on -X
backplanes are high speed. On older systems only data slot 1 is high speed (typically data slot 1 is
identified with the letter D in the installation drawings 903-8XXX-XX). Although the front panel RJ-45 ports
are compatible with both 10 and 100 Mbps traffic, the backplane link operates solely in a full-duplex,
10Base-T compatible mode, which is linked to the opposite end of the multiplexer system via the FMB
optical link. The electrical version of the EIB-10/100 cards may be operated over 10 km or more of optical
fiber, albeit with the throughput of a full-duplex, 10 Mbps Ethernet link.
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 5.5-1: EIB-10/100 Front Panel
Model 903 User's Guide, FMB-X-2.5 Version
EIB-10/100
Page 5-16
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