Block Diagram Of The Rs-422 Output Module - Symmetricom SSU-2000 User Manual

Chapter 8 Output Module Reference Data
RS-422 Output Module
Figure 8-18. Block Diagram of the RS-422 Output Module
Provisioning Output Frequencies
You use software commands to set the frequency of each port on the RS-422
Output module. Commands are available in both ICS and TL1 modes. To provision
the output frequency using ICS, see the OUTPUT command description in the
SSU-2000 Technical Reference. The TL1 commands RTRV-PRMTR-OUT422 and
SET-PRMTR-OUT422 are described in the SSU-2000 Technical Reference.
Note: You can set frequencies on port 1 through port 10. Port 11
follows the frequency setting of port 1. Port 12 follows the frequency
setting of port 2, etc. Ports 1 and 11, 2 and 12, ..., 10 and 20 have the
same frequency setting.
Output Squelching
The RS-422 Output module allows you to selectively turn off (squelch) the outputs
during periods of degraded performance. To use this feature, the Communications
module must have Revision D or later firmware.
This feature allows you to turn off any of 20 output ports on redundant or
non-redundant modules. The SSU-2000 uses the system Priority Quality Level
(PQL) to determine when the system is operating within specified limits; if the
outputs become degraded, the module automatically turns off the affected ports.
240 SSU-2000 User's Guide 12713020-002-2 Revision F.01 – January 2007