![]() ![]() If it doesn't work, you've either built it wrong or the CSU/DSU isn't working properly. ![]() If it does, you've successfully built the plug. Place the loopback plug into the T1 port and you should see the unit "synch" to itself by indicating either "Link" or having whatever is used for the WAN interface to show the unit now has sync. Test it on a "known good" router with a CSU/DSU (T1 interface). The loopback plug will allow the local phone company to test THROUGH THE SMART JACK and verify if the service is working properly through that point. They will likely want you to plug it into the 'smart jack' (the final hand-off point from the local phone company. Put the Cat 5 end into the crimper and verify all of the wires are pushed all the way into the pin slots and then crimp it down.ĩ. Let your ISP know you have a loopback plug. You should now have 2 wires "looped" in the cat 5 blank end with pin 1 connecting pin 4 and pin 2 connecting pin 5Ĩ. Put one end of the second wire into pin 2 and bend it in half and put the other end into pin 5.ħ. Put one end of the first wire (either one will do) into pin 1 and bend it in half and put the other end of it into pin 4.Ħ. If you are looking at it this way, the bottom slot is pin 1 and the top is pin 8.ĥ. Identify the pin order on the Cat 5 end: hold it with the movable/press-side of the clip away from you and the metal contacts facing left. usually same colors (brown and brown/white, etc.)Ĥ. Cut off about 2 to 4 inches of a Cat 5 cableģ.
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