21
4. Operation
4.1 Front-Panel Indicators and Controls
The indicators on the front panel can be seen in Figure 4-1. The functions of these
indicators are described in Table 4-1. LEDs are called out with numbers and
switches are called out with letters.
Figure 4-1. Front-panel indicators.
Table 4-1. Indicator functions.
Name
Type
Function
1. Power
Green LED
On—Line driver is powered up.
2. Loc
Yellow LED
On—A local loopback is active.
3. REM
Yellow LED
On—A remote loopback is active.
A. Test
Slide switch
Controls the local and remote
loopbacks.
4. ELECTRICAL Low
Red LED
On—T3 electrical input is below G.703.
5. ELECTRICAL AIS
Yellow LED
On—T3 electrical interface received
“All 1s” string.
PWR
ERR
AIS
LOW
AIS
LOC
NORM
REM
OPTICAL
ELECTRICAL
TEST
1
2
A
3
4
5
6
7
CHAPTER 4: Operation
POWER
