Comtech EF Data SMS-458B - Manual (Page 54)

SMS-458B Modem Protection Switch Revision 2
Operation MN/SMS458B.IOM
3–18
In this operating mode, the switch responds to keypad input affecting setup,
configuration, fault inquiries, and backup online status.
If the switch is in this mode when power loss occurs, it will return to this mode when
power is restored. However, the current backup status will be lost.
This mode also can be used for initial and subsequent configuration functions. (To enter
the LOCAL mode, press [2] and [ENT] while in the MODE menu.)
To change the backup status from local mode:
1. Press [F1] or [F2] to select modulator or demodulator. (If the switch is a modem
switch rather than an independent modulator/demodulator switch, press [ENT] to
continue.)
2. Select the backup modem number (1 or 2) and press [ENT].
3. Select the prime modem number from 0 to 4. (“0” takes the backup modulator or
demodulator offline; “1” to “4” selects that prime for backup.)
4. Press [ENT].
The switch performs the selected backup function and displays the online and fault status.
When the switch is in LOCAL mode, exercise care when changing the online status, as
the switch performs the selected function regardless of fault status or modulator and
demodulator compatibility.
3.4.5.4 Remote Mode
In this operating mode, the switch responds to serial remote interface or relay-remote
input. The switch can receive a full range of commands from the serial remote interface
user and a limited number from the relay-remote interface. If the switch was in this mode
prior to loss of power, it returns to this mode when power is restored. However, current
backup status will be lost. This mode can be entered only from the serial remote interface
or relay-remote interface.
For details of the remote interface specification, refer to Section 4.1.4 and Appendix A.
3.4.6 Faults