I have a nice little £2.50 tester. Two part device - connect the remote end and return to the master, switch on and it checks all conductors and has both RJ45 & RJ11 sockets.
Does yours tell you if a pair are switch or shorted? Mine will but both ends need monitoring for that.
M H C
taurus excreta cerebrum vincit
Edited by MHC (Mon 05-Jan-15 17:57:55)