DFS2106 UNKNOWN TERMINAL TRIED TO CONNECT ON LINE `x` PTERM `y`.

Explanation
 On a line where ID verification is required, a
3275 dial terminal, which was not authorized in the ID list, attempted
to connect to IMS.

System action
 The connection is broken. The line is restarted
and is waiting for a connection attempt.

Programmer response
 When the situation warrants it, use the
Log Print Utility (DFSERA10), with record type=X'69', to
list the offending terminal IDs and the lines they accessed.