Dsc alarm integration with envisalink evl4

I see...I am not familiar with that app...Suggest you contact the app developer with your questions.

The one I use with Envisalink is ....Envisalink Integration - #14 by interrobang

It works with my Honeywell Vista panel and I believe it works with DSC. It uses Telnet and is a bit chatty if you turn on debug logging, but it does work.