Yes, I have an OLD TSM client, 4.2.2.0 running on Novell 4.11
I am regularly getting these errors in the error log, and the backup never
seems
to finish anymore (for several weeks).

It is on an old slow processor (200mHz, PII), and backing up over a T1
circuit.

this is from the error logs
07/30/2003 04:29:00 NtliFlush: Error 10 sending data using t_snd.
07/30/2003 04:29:00 NtliFlush: Error 10 sending data using t_snd.
07/30/2003 04:29:00 ANS1809E Session is lost; initializing session reopen
procedure.
07/30/2003 04:29:00 ANS1809E Session is lost; initializing session reopen
procedure.
07/30/2003 04:29:15 ANS1810E TSM session has been reestablished.
07/30/2003 06:11:06 NtliFlush: Error 10 sending data using t_snd.
07/30/2003 06:11:06 NtliFlush: Error 10 sending data using t_snd.
07/30/2003 06:11:06 ANS1809E Session is lost; initializing session reopen
procedure.
07/30/2003 06:11:06 ANS1809E Session is lost; initializing session reopen
procedure.
07/30/2003 06:11:21 ANS1810E TSM session has been reestablished.

Any suggestions on how to debug this?
Nothing looks unusual in the schedule logs except the sessions being
restarted.