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Cause No. 84 – Call identity in use
This cause indicates that a call identity is in use.
Cause No. 85 – No call suspended
This cause indicates that no call is suspended.
Cause No. 86 – Requested call identity cleared
This cause indicates that the call having the requested called entity has cleared.
Cause No. 87 – Destination not a member of CUG
This cause indicates that the address of an outgoing call attempt is not a member of the Closed
User Group.
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, DN
subaddress) which cannot be accommodated. This call can also be returned by a switch to a CPE when
trying to route a call to an incompatible facility, or one without data rate.
Cause No. 90 – Destination address incomplete/Non-existent CUG
This cause indicates that the destination address is missing or incomplete
or
Indicates a non-existent Closed User Group
Cause No. 91 - Invalid transit network selection
This cause indicates that an Invalid transit network selection has been requested.
Cause No. 92 – Invalid supplementary service parameter [VN4 only]
Used to indicate an invalid parameter for supplementary service
Cause No. 95 – Invalid message, unspecified
This cause indicates that the entity sending this cause has received and Invalid message, only when no other
cause in this class applies.
CLASS 1.6 (protocol error; e.g. unknown message)
Cause No. 96 – Mandatory Info missing
This cause indicates that the equipment sending this cause has received a message which is missing an
information element which must be present in the message before that message can be processed.
Cause No. 97 - Message type non-existent or not implemented
This cause indicates that the equipment sending this cause has received a message with a message type it
does not recognize either because this is a message not defined, or defined and not implemented by the
equipment sending this cause.
Cause No. 98 – Message not compatible
This cause indicates that the message received is not compatible with the call state or the message type is
non-existent or not implemented.
Cause No. 99 – Info non-existent or not implemented, call processed
This cause is sent when the equipment sending this cause has received a message which includes the infor-
mation elements not recognized because the information element identifier is not define or it is defined but
not implemented by the equipment sending the cause. However, the information element is not required for
the equipment sending the cause to process the message.
Cause No. 100 – Invalid information element contents
This cause is returned when the equipment sending this cause has received an information element that
