[erlang-questions] {active, N} to build an echo TCP server?

[Frank Muller]

Hi guys

While able to build an echo TCP server which uses {active, once} and works
as expected,
I’m unable to design the same echo server using {active, N}.

Can someone help me understand how to use it?
How and where to decrement the N?
What happens when N reaches 0?

Thank you.
/Frank
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