Cut the pull string and tie it up in the junction box or other accessible but hidden is ok location at both ends.
How to fish a wire between floors.
Pull the e thernet cable to its destination and you re set.
Disconnect the pull string from the old cable.
Pull the string from above to fish the wire through.
As their name suggests glow rods glow in the dark.
Once the string reaches the bottom go down to the lower opening and tie the cable and string together.
Drop a string from above instead.
Attach the end of the new cable to the pull string.
Drill hole into wall plate.
Once your hole is drilled you can shove a glow rod through the hole to start fishing wire attach your wire to the eyelet at the end and pull it back through.
Have someone at the other end reach through the hole in the drywall grab the fish tape and pull it through with about a foot sticking out of the hole.
Glow rods can also be used to hook wires to pull them out as a wire snake tool.
Then attach your wire to the fish tape and pull it back through.
Attach the wire or cable to a fish tape or coat hanger using electrical tape and feed it into the hole until it reaches the opening at the other end.
For more in depth informatino about running fis.
If you want to bring the wire up to the attic tie something to a string and lower it through the hole from above.
If you have another floor to go you can follow the same steps in the same order.
Hurry to the next floor now and drill a hole in the bottom wall.
Use a coat hanger to fish the wire through on the other side and tack your cables to a stud to keep them neat and out of the way in case there is any future wall cutting.
Bend the wires over then wrap several loops of electrical tape around the wires and the end of the fish tape.
Now go up to your attic or down to the basement or crawlspace and drill a hole in the top or bottom wall plate in the same wall cavity as the outlet.
Pull the new cable through to the destination.
Run electrical cable through walls and across ceilings without tearing them apart.
Learn how with this video.