Comtech EF Data SMS-458B - Manual (Page 40)

SMS-458B Modem Protection Switch Revision 2
Operation MN/SMS458B.IOM
3–4
The ID menu displays the version of firmware implemented in the switch.
The [NEXT], [PREV], [F1], [F2], and [ENT] keys control the menus and allow menu
selections.
Some display messages have menu options on the right side aligned with the [F1] and
[F2] keys. Pressing either of these keys directs the display to the selected menu.
The user can also move forward or backward through the selected menu by pressing the
[NEXT] or [PREV] keys.
The switch beeps in response to keypad inputs:
• One beep acknowledges a valid entry with the appropriate action being taken.
• Two beeps indicate that the entry was invalid and no action was taken.
Once the correct menu is selected, the user can press the [ENT] key to enter, change, or
view the functions within that menu.
The STATUS display follows the MODE menu. It includes the following:
• Identifies the active modulator and demodulator, both prime and backup.
• Shows backup online status.
• Shows the fault status of both prime and backup modulators and demodulators.
The STATUS menu displays only the active modulators and demodulators. If any
modulator or demodulator is faulted, an “F” alternates with the modem number on the
display. The display shows online backup modulators and demodulators, with an arrow
pointing to the number of the prime being backed-up.
“Hot Standby” mode is identified by a dash between the backup modulator/demodulator
and the prime modulator/demodulator.
An asterisk is displayed while the backup modulator/demodulator is in process of backing
up a prime modulator/demodulator.
In all modes except BYPASS, the switch returns to the STATUS display returns after
approximately three minutes.
Refer to Figure 3-2 for a detailed description of the front panel menu. This figure
describes the independent mod/demod switch with support for use with an external
buffer/channel unit.