Specifications

FOM-E3, FOM-T3 Ver. 1.0 Controls and Indicators 3-1
Chapter 3
Operation
3.1 Turning FOM-E3 and FOM-T3 On
FOM-E3 and FOM-T3 operate as soon as they are connected to the power source.
The PWR LED turns ON and remains lit as long as the units are connected to the
mains.
3.2 Controls and Indicators
Figure 3-1 shows the front panel of FOM-E3. Table 3-1 lists the functions of the
FOM-E3 controls, connectors, and indicators located on the front panel.
PWR
LOC REM
NORM
LOW ERRAIS AIS
TEST ELECTRICAL OPTICAL
Figure 3-1. FOM-E3 Front Panel
Table 3-1. FOM-E3 and FOM-T3 Controls and Indicators
Name Type Function
PWR Green LED ON – FOM-E3 and FOM-T3 is powered up
LOC Yellow LED ON – A local loopback is active
REM Yellow LED ON – A remote loopback is active
TEST Slide Switch Controls the local and remote loopbacks
ELECTRICAL LOW Red LED ON – E3/T3 electrical input is below G.703
ELECTRICAL AIS Yellow LED ON – E3/T3 electrical interface received "All 1s" string
OPTICAL ERR Red LED ON – Bit error rate of the signal received from the optical interface
is 10
-6
or worse
OPTICAL AIS Yellow LED ON – Fiber optic interface received "All 1s" string