HP -UX B6941-90001 Administrator's Reference Manual page 347

Output conversion, before forwarding the message to
the management server, is from ROMAN8 to
ISO8859-1/WE8ISO8859P1 (the database character
set).
Tips
On HP-UX, it is possible to define different character sets for different
managed nodes. It is recommended that you set the character set most
frequently used on each managed node. For example, if you mostly
monitor logfiles with ROMAN8 characters, you should use ROMAN8 for
your managed nodes. Similarly, if your environment mostly generates
input data for ITO in the ISO 8859-1 character set, you should set the
managed node character set to ISO 8859-1. If in doubt, use ISO 8859-1.
Note that you can use a different character set for each managed node.
You determine the managed node character set by the character sets
used in your environment.
Chapter 8
ITO Language Support
Character Conversion in ITO
347