The value of tmnxAncpStrInfAssociation indicates to what object the
ANCP-string is associated.
If set to sap(2), the associated sap can be found in
tmnxAncpStrInfSapPortId and tmnxAncpStrInfSapEncapValue.
If set to multiServSite (3), the associated multi-service site can be
found in (tmnxAncpStrInfMultSvcSiteName tmnxAncpStrInfMultSvcSiteCust).
If set to subscriberId (4), the associated subscriber-Id can be found
in the object tmnxAncpStrInfSubscrIdent.
If set to none (1), no association is currently known for the ANCP
string.