Starting TCP

I'm confused. There is a startup job on the controlling subsystem.
Essentially the first thing it does is call QSTRUP. Then, it does STRTCP.
I retrieved the source of QSTRUP. Nothing about starting TCP in it.

This startup job, not from IBM, has a MONMSG CPF9999 following the STRTCP
command.

I thought that TCP would have to be up before the LAN console would be
available. This STRTCP was added locally to the vendor code back in 1998.

Two questions:

1) When/how is TCP started?
2) Is this STRTCP doing anything or just a relic from a long time ago?

I believe this modification dates back to when we were on a CISC box and
just starting on networking.

Currently at v5r4m0.

I can explain why I was looking, but it started with a request from the
boss.

John McKee