Connectors, Indicators, And Controls - Black Box 39004 User Manual

3. Connectors, Indicators, and
Table 3-1. Connectors, Indicators, and Controls
No. Connector, Indicator, or Control
1 TX LED: Transmitting binary 0 via fiber optic
2 G.703 connector
3 FO/S LED: Power/FO Link/sync
4 LL LED: Unit in line loop mode*
5 DL LED: Unit in digital loop mode*
6 Loop mode button
7 ST connector for fiber optic receiver
8 ST connector for fiber optic transmitter
9 C LED: G.703 signal present
10 RX LED: Receiving binary 0 via fiber optic
A Power connector
*Both LEDs lit: Unit is in remote loop mode.
CHAPTER 3: Connectors, Indicators, and Controls
Controls
1
TX RX
I/F
LL DL
4
3
2
Figure 3-1. Front and Rear Panels.
10
9
FO
FO/S
RX TX
C
LOOP
5 6 7 8
A
9