Yes do that test first. TBO the panel comms should by default on UK or EN be set up pretty much how you'd want it in this instance. There is 2ply on fe zones but as soon as panel goes into bells channel 3 should go neg (+ve removed). Check cmd 153, make sure option 03 (intruder) selected.

Your right about confirmation, but there is a couple of seconds delay on op3 when confirmation selected. I thought maybe if you were unsetting v quickly not to upset neighbours!

Yes, lets prove the panel or dialler first as could be barking up wrong tree.

Yippee! Got it working, you are right, I didn't let the alarm go off long enough for it to dial out. Prior to this, I swapped the alarm output types for the pin-outs and they all work fine. Once again, thanks for helping me out and going the extra mile in supplying me the wiring harness.

Thanks

Glad your all sorted.