Black Box 39004 User Manual page 16

Local fiber optic modem switched
Figure 5-3. Data Signals at Remote Loop/Line Loop Mode.
Pin Signal
2 R A
4 T A
9 R B
11 T B
to remote loop mode
Table 5-1. G.703 Pinout (Female)
Terminal End
Input
Output
Input
Output
Figure 5-4. G.703 Connector.
CHAPTER 5: Data Signals
Fiber optic modem forced to loop
mode by other modem
Network Termination
Output
Input
Output
Input
15