This object denotes the charging record type of this APN.
Each type has different PDP or Bearer context behavior and
is given as below:
noconfig - When no record type is configured.
none - when there are no active PDP or Bearer contexts under
this APN
gcdr - When the derived record type is gcdr, the Gateway
indicates CSG2 that gcdr generation is configured for
this user, so that CSG2 will generate service level
CDRs.
egcdr - When the derived record type is egcdr, the Gateway
indicates CSG2 that egcdr generation is configured
for this user, so that CSG2 will not generate
service level CDRs.