Comtech EF Data CRS-311 - Manual (Page 112)

CRS-311 1:1 Redundancy Switch Revision 7
Front Panel Operation MN/CRS311.IOM
5–2
5.1.1 Front Panel Vacuum Fluorescent Display (VFD)
The Front Panel Vacuum Fluorescent Display (VFD) is an active
display showing two lines of 24 characters each. It produces a
blue light with adjustable brightness. Compared to a Liquid
Crystal Display (LCD), it has greatly superior viewing characteristics and does not suffer problems
of viewing angle or contrast.
The CRS‐311 ”splash” screen appears once power is applied to the unit. The top line of this screen
identifies the product; the second line identifies the modem for which the CRS‐311 is configured
(e.g., SLM‐5650A, CDM‐Qx, etc.), and the version of the CRS‐311’s installed firmware.
Press any key to display the top‐level SELECT: menu. On most menu screens, you will see a
flashing, solid‐block cursor. This indicates the currently selected feature, character, or digit:
CONFIG: MANUAL AUTO[ON]
HOLDOFFS MASKS REMOTE
Where a solid block cursor would obscure the numeral or character under edit, the cursor
automatically changes to an underline cursor:
BACKUP HOLDOFF SEC: 05
RESTORE HOLDOFF SEC: 04
If you were to leave the unit displaying the same screen for weeks at a time, the display could
become ‘burnt’ with this image. To prevent this, the unit has a ‘screen saver’ feature that
activates after 1 hour and constantly scrolls a message across the screen. The top line of this
message shows the user‐created Switch ID; the bottom line shows the current status of the Switch
followed by the message ‘Press any key…’:
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Press any key...
The message moves from right to left across the display, then wraps around. Press any key to
restore the previous display.