what does this error message mean?

[Mike Nemeth]

hardware: IPC 386, USR Courier v.32 modem
software: ISC 3.2.2
problem: uucico failing on large file transfer.

my feed is sending news (or some large file(s)).
at some point after 1000 blocks or so, the connection is broken,
the large TM.* file disappears, and the following is appended to
/usr/spool/uucp/.Log/uucico/name-of-feed:

uucp calgary  (1/10-3:53:05,11577,0) OK (startup)
uucp calgary  (1/10-3:53:05,11577,0) REMOTE REQUESTED (calgary!D.fsa20ca38d -->
 vort!D.fsa20ca38d (news))
news calgary  (1/10-4:17:01,11577,1) IN SEND/SLAVE MODE (INPUT FAILURE)
news calgary  (1/10-4:17:01,11577,1) FAILED (conversation complete)
 ...

does anybody have any idea what it means, and more important, what i
can do to fix it?

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Mike Nemeth     Vort Computing   ...calgary!vort!mike