The name of the SNMP MIB context from which the alarm came.
For SNMPv1 traps this is the community string from the Trap.
Note that care needs to be taken when selecting community
strings to ensure that these can be represented as a
well-formed SnmpAdminString. Community or Context names
that are not well-formed SnmpAdminStrings will be mapped
to zero length strings.
If the alarm's source SNMP engine is known not to support
multiple contexts, this object is a zero length string.