Comtech EF Data OMS11 - Manual (Page 12)

OMS11 1:1 Redundancy Switch Introduction
TM133 – Rev. 1.1 1-1
Introduction
1
1.0 Description
The Radyne OMS11 Outdoor Modem Switch provides redundancy protection for the OM20
Outdoor Modem, BUC and LNB. The OMS11 offers redundancy support for OM20 user data,
Asynchronous data, RS485 and BUC/LNB Waveguide Switching control. The OMS11
redundancy system is based on a Chain switching system that switches the IF/RF primary path to
the IF/RF Backup path. Optional BUCs, LNBs, Waveguide Switches and Mounting hardware are
optional items that can be supplied with the system. Contact Radyne for supported hardware
options. Refer to Figure 1-1 for an illustration of the OMS11 1:1 Redundancy Switch Front Panel
and Figure 1-3 of an OMS11 Functional Block Diagram.
Operating in the Automatic Mode, the OMS11 immediately places a Backup Modem and IF/RF
Path online in the event of a Primary Modem/IF/RF path fails. The OMS11 chain switches the
modem, BUC and LNB. In the Manual Mode, the user may designate the selected Online
Primary Modem from either the Interactive Front Panel or a remote Terminal Interface. The
backup functions of the OMS11 may be performed manually via the front panel or the RS485,
RLLP remote protocol or the RS232 Terminal port.
Figure 1-1 OMS11 1:1 Redundancy Switch Front Panel
1.1 Redundant Power Supplies
The OMS11 is equipped with two fully redundant internal power supplies. Each power supply is
independent of the other, including their source of AC or DC input source. The OMS11 remains
fully operational as long as either power supply is providing a source of power. The power
supplies are internal to the OMS11 Chassis.