Comtech EF Data SMS-458B - Manual (Page 24)

SMS-458B Modem Protection Switch Revision 2
Introduction MN/SMS458B.IOM
1–8
1.4 Major Assemblies
The switch consists of the following assemblies:
Assembly Description Part No. QTY
Chassis AS/2040-1
Controller Motherboard AS/1317
Data Switch Motherboard AS/2034
Data Switch Controller AS/2031 2 each
Monitor and Control AS/0356
Address Decoder/Driver AS/1048
IF Switch Driver AS/1316
IF Switch AS/1314
O/L Telemetry AS/0585
Display/Keypad AS/0540
Power Supply AS/1508-1 2 each
Prime Interface Switch AS/2068 up to 4
Backup Interface Switch AS/2069 1 each
1.5 System Requirements
With all interface switch modules installed, the switch is capable of operation as a 1:4
protection switch (i.e., one full-duplex standby modem can back up four full-duplex
primary modems).
The switch can be configured in any combination including:
• TX only modems
• RX only modems
• Multiple downlinks (limited to 4)
Refer to Section 3.1 for a complete explanation of the configuration function.