907-0601-00 Rev. C Model 907 Video/Data Multiplexer – User’s Guide
Focal Technologies Corp. Page 4-1
4.0 Media Converters
Model 907 media converter cards are PC/104 form-factor modules used to provide optical transmission of
high-speed data signals (20-1500 Mbps), such as Ethernet, ECL/PECL for multi-beam sonar links, IEEE-1394
(widely known as “Firewire”) for digital cameras and digital high-definition video (SMPTE-292). Media
converters may be deployed as standalone cards using a designated fiber or as CWDM versions that are
optically multiplexed with a motherboard or other media converter cards.
Standard media converter cards are available as "standalone" and "stacking" units. Standalone (nonstacking)
cards have short pins on the PC/104 connector and typically use 1310/1550 nm wavelengths that operate on
a dedicated fiber. Stacking units have long pins on the PC/104 connector so that they can be stacked on top
of other cards, typically a 907 motherboard with expansion cards. Usually stacking units have CWDM
wavelength transceivers so that their optical signals can be combined with other cards in the stack on a
common fiber. Unless otherwise specified, standard media converter cards with 1310/1550 nm wavelengths
are non-stacking. Media converter cards with CWDM wavelengths are available in stacking and non-stacking
versions. Non-stacking cards require their own power harness whereas stacking cards draw power from
attached cards, e.g. multiplexer motherboard, via the PC/104 connector.
The diagnostics data from SFPs on the media converters may be accessed by motherboards with diagnostic
capability when stacked together.
Figure 4-1 shows a Quad-port Gigabit Ethernet Switch (GBES) media converter card.
Figure 4-1: Media Converter Card (907-GBES)
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