That's good and I will use it whenever supported, but my point remains 23 is a really bad choice and should be changed.

Hello, I don't know the exact reason why MODEM_DEFAULT_PORT is set to 23, but I wanted to stress the fact that this is among the worst possible choices. Not only is port 23 reserved to telnet (I suppose this was somehow the reason for the choice), which is a bad thing itself, ports below 1024 cannot …