Communication cable

Hi all my problem is in the communication cable … Having a cable with 2 wires one white one blue when it is connected correctly it does not work when only one wire is connected I receive signal and I can armed. When I connect the communication cable 1m long it works 200m no.
Testing with testers is not short.!

Hi @Marcopesca99,

I’m having a little difficulty understanding your issue. Are you say that you have 1m of Slim tether and that you have full communication on only one wire?