Gateway RE927X and paradox alarms communication problme

Hi all
I don’t know if any of you are have the same problem with the RE927X Gateway when the paradox alarm go off the signal for the alarm company to say you paradox alarm has gone off the signal get blocked by the RE927X Gateway. I know you can use PGM transmitter but they are very hard to get hold of and they are getting fazed out.

If any one can help or has way round the problem ?