How to make a T1 loopback
June 4th, 2009
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Sometimes you need a quick and easy way to test a T1 connection on a piece of equipment. For example, you want to make sure that the T1 WIC on your router is working.
To construct a loopback plug, simply take a single RJ45 plug and connect pin 1 to 4 and pin 2 to 5.