The SBX is not a passive system it looks for a certain co voltage, however it seems you are inside the range. I used to test my SBXs by running slt dialtone from the system back into a co port. The tree clicks bothers me, the SBX does not know the line is being seized or vice versa, I would dial a number from the SBX after going off hook and see if the line seizes even if you don't hear dialtone first.
Last edited by Derrick; 05/26/17 02:03 PM.
www.myrandomviews "Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"
Retired, taking photographs and hoping to fly one of my many kites.
