This object is used to specify the notification charset
used for notification text in event messages, specified as an
IANA registered charset identifier, eg, 'MIBenum' value
(per RFC 2978).
Usage: If 'xcmGenNotifyRuleCharset' is 'other(1)', then the
value of 'xcmGenFixedLocalizationIndex' SHALL be used for a
notification rule locale specifier for charset.