To set the modem as an end-of-line device, wire the 9-pin connector using solder connections as shown in Figure 1.
Important: If the fiber modem is at the end of a network segment (one wire conected) then you must use the built-in termination. Failure to use the built-in termination will affect the biasing and other electrical characteristics of the trunk.
Note: The following figure shows the 9-pin female connector. The pin numbers on the 9-pin male connector are reversed.
Figure 1. Female Modem Cable Connector: EOL Set to In