1:N Redundancy System Power-Up Sequence; Crs-280L Operations With The Crs-500 M:n Redundancy System - Comtech EF Data CRS-280L Installation And Operation Manual

5.3 CRS-280L 1:N Redundancy System Power-up Sequence
After the 1:N redundant system cabling is complete, and the companion switch and modems
have been initially configured, the complete sysyem may be powered up. The typical equipment
power-up sequence is as follows:
Step Instructions
1 Turn on the redundant and traffic L-Band modems.
2
Power up the CRS-280L L-Band IF Switch switch by turning both power supply switches, located on
the CRS-280L rear panel, to the on position.
Once the power supplies are turned on, both power status LEDs (A and B) on the front panel should
illuminate green.
3 Power up the companion switch as applicable (e.g., turn on the system controller / data switch for the
CRS-300, CRS-400, or SMS-7000; turn on the CRS-500 Control Switch Unit (CSU), etc.)
The CRS-280L is designed to operate with only one power supply energized. However, it is
recommended to continually operate the system with both supplies energized for redundancy.

5.3.1 CRS-280L Operations with the CRS-500 M:N Redundancy System

While the CRS-500 M:N Redundancy System supports 2:N redundancy and IP Sub-MUX
operation, the CRS-280L L-Band IF Switch is limited to 1:10 (maximum) redundancy – 2:N
redundancy and IP Sub-MUX operation are not supported by the CRS-280L.
Redundancy System Configuration / Operation
CRS-280/280L IF Switch for 1:N Redundancy
5–2
Revision -
MN-CRS-280/280L