TS 33108 v10.1.0 (2010-10-08) agreed at SA#49

    linkedEPSBearerId                    [13]  OCTET STRING                       OPTIONAL,

    tFT                                  [14]  OCTET STRING                       OPTIONAL,

    handoverIndication                   [15]  NULL                               OPTIONAL,

    failedUEReqBearerResModReason        [16]  OCTET STRING (SIZE (1))            OPTIONAL,

    failedBearerModReason                [16]  OCTET STRING (SIZE (1))            OPTIONAL,

    trafficAggregateDescription          [17]  OCTET STRING                       OPTIONAL,

    failedTAUReason                      [18]  OCTET STRING (SIZE (1))            OPTIONAL,

    -- coded according to TS 24.301 [47]