S320 OCS Hardware User Guide
Doc. Part No. 460167-00
May 27, 2015
Rev. B7
Page 22 of 46
input fiber to an output fiber, voltages are applied to the input fiber’s input mirror to point that
mirror at the output mirror corresponding to the desired output fiber. The output fiber’s output
mirror is aligned by applying the required voltages so that the final reflection is directed with
minimum insertion loss to the desired output fiber. The MSM sits on vibration isolators for
enhanced protection against environmental impacts.
Within the MSM, there are eight (8) mirror drivers, each one capable of supporting up to
96 MEMS mirrors. These mirror drivers provide the appropriate voltages to each MEMS mirror
in the MSM for establishing and maintaining connections. The mirror drivers are controlled
by the Control Processor (CP), which is the “brain” of the S320 OCS. The CP establishes and
maintains connections and coordinates system management. Because of the vital role of
the Control Processor, the S320 OCS is equipped with redundant CPs: active and standby.
Configuration and provisioning changes made on the active CP are synchronized to the hot
standby CP. If the active CP fails, the standby CP takes over. No existing connections are
affected by the CP switchover.
3.3
Front and Rear Panels
This section describes the physical interfaces and connectors located on the front and rear
panels of the S320 OCS. Figure 4 and Figure 5 show the front and rear panels of a version 1
system configured with the rear power option. Similarly, Figure 6 and Figure 7 show the front
and rear panels of a version 2 system also configured with the rear power option. In both
examples, the -48 VDC power modules are installed in the rear panel of the switch, and the
front-panel power module bays are filled with blanks.
