What to reply to EB890011"NULL"0000R0L0#[]?

Question

Computer networks

Greetings!
Acquired an alarm system with the ability to work via tcp / ip. In general, he registered ip and port and he sends this string EB890011"NULL"0000R0L0#[] and apparently waiting for an answer.

Please tell me what he expects in response and how to decrypt this string? I have to deal with this for the first time, if possible in as much detail as possible, please, or can you advise what literature to read about this, which I wrote in an accessible and understandable language.

Answer 1

If you read literature for every question you do not understand, life will not be enough.
On the very question - what kind of model? In response to what request does it send this string?
Obviously, since you sent her something, and she answered, it's not about the ip and port network settings. Where did you get and so clearly identified that

works on tcp/ip

is of some importance in the context of this question? Are there any prerequisites for this, that the matter is connected with the network? Not enough information to advise you.

Answer 2

Similar to this protocol https://www.securityindustry.org/wp-content/upload...