[Info-vax] preventing FTP from timing out

[Phillip Helbig---undress to reply]

  HP TCP/IP Services for OpenVMS Alpha Version V5.4 - ECO 7

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421 Service not available, remote server timed out. Connection closed.
122054124 bytes sent in 07:56 (250.35 KiB/s)

What causes this timeout?  (I thought one reason for hash was to keep
things from timing out.)  The connection is otherwise OK, as far as I
can tell. 

Is there somehow I can increase the timeout?  At least if something is 
actually being transferred, I don't want it to time out.