Comtech EF Data SMS-458B - Manual (Page 55)

SMS-458B Modem Protection Switch Revision 2
Operation MN/SMS458B.IOM
3–19
When any fault LED(s) is lighted, an operational fault condition exists. However, the
LEDs are only a summary visual alarm. The user uses the FAULT menu to determine the
exact cause of the fault and takes remedial action if necessary.
The FAULT menu provides fault information. Use the 1, 2, 3, 4, [NEXT], and [PREV]
keys to reveal the nature of any fault indicated by a front panel red LED.
The following sections list all the possible fault messages that could appear in each
category. Refer to Section 5.2 for a list of the possible causes and for the fault isolation
procedures.