etsysConfigChangeNonVolatileMethod
1.3.6.1.4.1.5624.1.2.12.1.3
The method that was used to make the last non-volatile
change. i.e. SNMP, TELNET, LM, CLI. If the individual
user login, or the source IP address, is available they
should be included in this string.
example format: <TELNET: 192.168.0.1: JohnJones>
Return a null byte if no information is available and
the group is otherwise supported.