New details, Re: Troubleshooting Telnet connections that drop for no apparent reason -- HELP?

Some new data, from my newest diagnostic!

Here is what I know from this latest diagnostic:

First, at timestamp 16:28:41.519, we get a block of 1297 bytes. This block renders a rather unremarkable message display screen using a subfile, using one Write To Display command that renders the screen, a second WTD that ends immediately after the control characters, and a Read MDT Fields command.

Then, at timestamp 16:28:42:222 (less than 3/4 of a second later), we get a failed read on the socket. Specifically, the Java is.read(byte[] b, int off, int len) on the socket is itself returning a -1 (which is supposed to indicate an EOF), and no exception is being thrown.

Then, at timestamp 16:28:43.988 (over 1 3/4 seconds later) we try to send a 13 byte (15 with the terminating IAC EOR) response.

Since this whole sordid affair has begun, I've been unable to force an EOF on a Telnet socket with our hardware, not by killing the connection in WRKTCPSTS, not by varying off the device, and not by physically unplugging the Ethernet cable.

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JHHL