Required interface module for an existing DSC alarm system

Hi ! everyone...

I need Ethernet shield based interface module for an existing alarm system DSC brand,kindly route me ..how to do it

Any Ethernet shield should work. But it won't help unless you know the communication protocol, which commands can be sent and which responses can be expected. Consult the technical documents of your system.

If I was an alarm manufacturer and I had an ethernet port on my alarm box, I don't think I'd let just anyone talk to it like that. There would have to be a number of layers of public and private keys before you could do anything useful with the alarm.

Otherwise any thief with access to the network now has access to the building. It would be like those Hollywood movies where the hacker types a few things on his laptop and the locks fall open.

If DSC don't publish the interface standard then you are out of luck.