Remote Reset - Symmetricom SSU-2000 User Manual

Note: Perform step 5 below only if a BNO tee connector is not
installed on J16 on the first SDU-2000 shelf. If a tee connector is
installed, skip to step 6.
5. Remove the Backup Clock cable from J16 on the rear panel of the first
SDU-2000 shelf. Install a BNO tee connector (part number 551095-0001) to
J16. Reconnect the Backup Clock cable to the tee connector.
6. Install a BNO tee connector (part number 551095-0001) to J16 on the rear panel
of the second SDU-2000 shelf.
7. Attach one end of a second Backup Clock cable (part number 12013115-xxx-0;
the xxx indicates the length of the cable) to the tee connector on J16 of the first
SDU-2000 shelf
8. Attach the other end of the Backup Clock cable to the tee connector on J16 on
the second SDU-2000 shelf.
9. Set the Clock Termination switch S2 on the rear panel of the second SDU-2000
to the 120 Ohms position.
Note: For installations with multiple SDU-2000 shelves, set S2 on all
shelves to Open, except for the last shelf in the chain; set S2 on this
shelf to 120 Ohms.
10. Set the Shelf Address switch S1 on the rear panel of the second SDU-2000
shelf to the 3 position.
Note: For installations with multiple SDU-2000 shelves, set S1 on
each shelf to the number corresponding to the shelf's position in the
chain.

Remote Reset

The SSU-2000 shelf has a remote reset input which can be used to remotely initiate
system firmware reset if the need should arise. The remote reset connections are
made via connector J19, which is a BNO connector labeled REMOTE RESET. A
contact closure across the two pins resets the firmware.
12713020-002-2 Revision D – April 2004
Installing the SSU-2000
Remote Reset
SSU-2000 User's Guide 77