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TR1034 DID/Combo Board doesn't work with cables from TR114 board

Author: Luis Fernandes

Answer

PROBLEM

After upgrading from a Dialogic® Brooktrout® TR114 DID/COMBO Fax Board to a Dialogic® Brooktrout® TR1034 DID/COMBO Fax Board, using a cable that was used with the TR114 fax board, only the Analog Loop Start ports will work, and the DID ports will not work.
 

ENVIRONMENT

  • GFI FaxMaker 
  • All Supported Environments
 

SOLUTION

  1. Use the cables supplied with the TR1034 board.
  2. Alternatively, rewire the Telco DID jacks to reverse the polarity as shown below:

           A RJ48/45 DID plug on the TR1034 has the following pin assignment:
           Pin 3 = Tip 1
           Pin 4 = Ring 0
           Pin 5 = Tip 0
           Pin 6 = Ring 1

           A RJ48/45 DID plug on the TR114 has the following pin assignment:
           Pin 3 = Ring 1
           Pin 4 = Tip 0
           Pin 5 = Ring 0
           Pin 6 = Tip 1


CAUSE

The TR114 and TR1034 boards use different pinouts for tip and ring. Unlike regular Loop Start Analog lines, a DID line is specific about which pin on the cable is tip and which is ring.