04.083GPPMobile radio interface Layer 3 specificationRelease 1998TS
H.5.1 Cause No. 81 "invalid transaction identifier value"
This cause indicates that the equipment sending this cause has received a message with a transaction identifier which is not currently in use on the MS-network interface.
H.5.2 Cause No. 87 "user not member of CUG"
This cause indicates that the called user for the incoming CUG call is not a member of the specified CUG.
H.5.3 Cause No. 88 "incompatible destination"
This cause indicates that the equipment sending this cause has received a request to establish a call which has low layer compatibility, high layer compatibility, or other compatibility attributes (e.g., data rate) which cannot be accommodated.
H.5.4 Cause No. 91 "invalid transit network selection"
For further study. Treated as cause no. 95.
H.5.5 Cause No. 95 "semantically incorrect message"
This cause is used to report receipt of a message with semantically incorrect contents (see sub-clause 8.8).