Struggling to understand the socket timeout

[hardysabs2]

We have a 1000ms timeout on socket and then these...
send: 10000,
response: 10000

I am struggling to properly understand what the socket step means.
"...socket starts when the socket is connected. See [request.setTimeout]..."

We are successfully sending the request to the server and the server is definitely actioning the request, though we are NOT receiving the server's response, however the timeout is not a response timeout it is a socket timeout.
I don't fully understand when the socket timeout ends and what that means and if the issue is likely to be client side (something our OS layer is not doing) or server side (something the server is not doing even though it receives and actions the request and we are not getting a response timeout per se).

Many thanks