Functional description
136 MPR-e and MSS-1c User Manual 3DB19901EFAA Edition 01
The User port 2 can be used as SynchE synchronization.
The User port 3 and port 4 can be used as SynchE synchronization in optical mode.
3.10.2 — MSS-1c Fan unit
An optional Fan unit must be used to dissipate the MSS-1c in the special case when the
ambient temperature is > +50°C (MSS-1c) or >+55°C (MSS-1c 16PDH).
Figure 3.47 shows the installation position: the MSS-1c on the right and the Fan unit on the
left.
The MSS-1c and the Fan unit are mounted on a bracket compatible with 19" rack. Height
is 1.3U.
The Fan unit is powered by the MSS-1c with a cable placed on the rear side. The cable is
provided with the Fan unit.
The Fan unit includes two fans.
One bi-color LED on the front panel gives the status of the Fan unit:
• Fans alarm = OFF <-> LED = green
• Fans alarm = ON <-> LED = red
Figure 3.47 — MSS-1c and Fan unit
3.10.3 — MPT-HC/HC-HQAM/XP/XP-HQAM/9558HC
Note: MPR-E: User port 3 is not available as a synchronization source on the MSS-1c
variant.
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