907-0601-00 Rev. C Model 907 Video/Data Multiplexer – User’s Guide
Focal Technologies Corp. Page 6-5
6.4 907-CWDM (CWDM Optics Card)
907-0015-00 (SMF), 907-0015-02 (MMF)
The 907-CWDM optics card shown in Figure 6-5 is a two-channel CWDM optical add/drop multiplexer
(OADM). The 907-CWDM is able to add or drop individual 1471 nm and 1491 nm CWDM wavelengths to an
existing 1310/1550 nm (wider band) WDM signal by daisy chaining to the existing fiber link.
The 907-CWDM optics card delivers cost savings by upgrading an existing 907 multiplexer system operating
at 1310/1550 nm wavelengths. For example, with a 907-CWDM optics card, a 907Plus multiplexer
motherboard using a bidirectional transceiver operating at 1310/1550 nm wavelengths can be upgraded by
adding a 907-GBE Gigabit Ethernet media converter card that uses a transceiver operating at 1471/1491nm
wavelengths.
To daisy chain the 907-CWDM optics card, the bypass port ST1B should be connected to a 1310/1550 nm
907 card and the common port ST2B should be connected to the external cable system per the configuration
drawing.
Figure 6-5: 907-CWDM Optics Card
The standard 1471 nm and 1491 nm CWDM wavelengths used on the 907-CWDM optics card can be
changed to other CWDM wavelengths upon request, but only the 1471/1491 nm version can be daisy chained
with existing 1310/1550 nm systems.
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