Specifications

Chapter 1 Introduction Installation and Operation Manual
1-6 Technical Specifications FOM-E3, FOM-T3 Ver. 1.0
Range See Table 1-1
Diagnostics
Loopbacks • Local loopback (LLB), activated via front panel slide
switch
• Remote loopback (RLB), activated via front panel
slide switch
AIS Signaling Frequency of ±25 ppm is sent to the electrical interface
at the local unit in the event of an optical signal loss.
When the electrical interface input level is "LOW",
"all 1s" signaling is sent to the optical output
Alarm Relay
Port
Connector 9-pin, D-type, female
Alarms • Major – E3/T3 electrical input becomes lower than
G.703 electrical levels, or bit error rate at the fiber
optic interface is 10
-6
or worse
• Minor – Alarm Indication Signal is received at the
E3/T3 electrical or fiber optic interfaces
Operation Normally open and normally closed, using different pins
Indicators
PWR Power
LOC Local loopback is active
REM Remote loopback is active
ELECTRICAL LOW E3/T3 electrical input is below G.703
ELECTRICAL AIS E3/T3 electrical interface received "All 1s" string
OPTICAL ERR Bit error rate of the signal received from the optical
interface is 10
-6
or worse
OPTICAL AIS Fiber optic interface received "All 1s" string
Power
AC Source 100–240 VAC, 50/60 Hz, 0.2 VA
DC Source 40–72 VDC, nominal, 0.5A
Physical
Height 4.4 cm (1.7 in)
Width 19.4 cm (7.6 in)
Depth 24.3 cm (9.6 in)
Weight 1.4 kg (3.0 lb)
Environment
Temperature 0° to 45°C (32° to 113°F)
Humidity Up to 90%, non-condensing