This object enables a SNMP peer to create, modify, and
delete rows in the cevcEvcTable.
cevcEvcIdentifier column must have a valid value before a
row can be set to 'active'.
Writable objects in this table can be modified while the
value of cevcEvcRowStatus column is 'active'.
An entry cannot be deleted if there exists a service instance
which is referring to the cevcEvcEntry i.e. cevcSIEvcIndex
in the cevcSITable has the same value as cevcEvcIndex being
deleted.