I would try to run a pc on one end and plug it into both the n1 directly and then the n150 lan ports. This should let you know if the cable is bad. If it does not work in any combination then the cable is bad. If you have the tools you can cut both ends off and re terminate the cable for less than $.25 but if you do not then a 50mt cable is pretty cheap compared to spending lots of time troubleshooting it.
Although it is uncommon to get a commercially built cable wired wrong check the color pattern on both ends and ensure they are first exactly the same and then that they follow the 568a or 568b standard