Wavecom GSM Modem
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Cause no 96: "Invalid mandatory information"
This cause indicates that the equipment sending this cause has
received a message where a mandatory information element is missing
and/or has a content error (the two cases are undistinguishable).
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 but not implemented by the
equipment sending this cause.
Cause no 98: "Message not compatible with short message protocol
state"
This cause indicates that the equipment sending this cause has
received a message such that the procedures do not indicate that this is a
permissible message to receive while in the short message transfer state.
Cause no 99: "Information element non-existent or not implemented"
This cause indicates that the equipment sending this cause has
received a message which includes information elements not recognized
because the information element identifier is not defined or it is defined but
not implemented by the equipment sending the cause.
However, the information element is not required to be present in the
message in order for the equipment sending the cause to process the
message.
Cause no 111: "Protocol error, unspecified"
This cause is used to report a protocol error event only when no other
cause applies.
Cause no 127: "Interworking, unspecified"
This cause indicates that there has been interworking with a network
which does not provide causes for actions it takes; thus, the precise cause for
a message which is being send cannot be ascertained.
