22
T3 FIBER OPTIC LINE DRIVER
Table 4-1 (continued). Indicator functions.
Name
Type
Function
6. OPTICAL ERR
Red LED
On—Bit-error rate of the signal
received from the optical interface is
10
-6
or worse.
7. OPTICAL AIS
Yellow LED
On—Fiberoptic interface received
“All 1s” string.
4.2 Operating the Line Driver
4.2.1 P
OWERING
O
N
The line driver starts operating as soon as it is connected to the power source. The
POWER LED turns On and remains lit as long as the line driver is connected to
the mains.
4.2.2 N
ORMAL
O
PERATING
I
NSTRUCTIONS
1. Check that the TEST switch is set to the NORM position.
2. Verify LED status. During normal operation, the POWER indicator should be
On; all others should be Off.
NOTE
Some of the LEDs may turn on when the line driver is powered up,
indicating that other communication equipment is not functioning
properly.
3. If there is an indication of a malfunction or fault, run a diagnostic test.
4.2.3 P
OWERING
O
FF
Turn the line driver off by disconnecting the power cord from the mains.
