NDN code Meaning
ABS Absent subscriber. The mobile terminal is not logged in to the ocean region.
ACB Access barred.
ADR Addressee refuses to accept message.
ANU Deleted. The message has not been delivered within an hour and is therefore deleted.
ATD Attempting to deliver the message.
BK Message aborted. Is used when a fax or PSTN-connection is cleared abnormally.
BUS Busy.
CCD Call cut or disconnected.
CI Conversation impossible.
CIE The LESO ran out of processing/communications capacity to process the message.
CNS Call not started.
DTE Data terminal equipment. Used when an X.25 subscriber has cleared the connection during the call attempt.
ERR Error.
FAU Faulty.
FMT Format error.
FSA Fast select acceptance not subscribed.
IAB Invalid answer-back from destination.
IAM Was unable to process the address information in the following message:
IDS Invalid data from ship.
IDT Input data time-out.
IFR Invalid facility request.
IMS Message size is invalid; 7,932 characters maximum.
IND Incompatible destination.
INH Was unable to establish the type of message from the following header:
INV Invalid.
ISR Invalid ship request.
LDE Maximum acceptable message length or duration has been exceeded.
LEF Local equipment failure.
LPE Local procedure error.
MBB Message broken by higher priority.
Listed below is a selection of non-delivery notification (NDN) codes used by some Inmarsat-C LESOs.
In addition to, or instead of, these codes, some LESOs may use their own codes or messages.
To find out the particular NDN codes/messages used by a specific LESO, and their meanings, contact the LESO directly at its number.
MCF Message channel failure.
MKO Message killed by operator.
MSO Machine switched off.
NA Correspondence with this subscriber is not permitted.
NAL No address line is present.
NC No circuits.
NCH Subscribers number has changed.
NDA No delivery was attempted.
NFA No final answer-back.
NIA No initial answer-back.
NOB Not obtainable.
NOC No connection.
NP No party. The called party is not, or is no longer, a subscriber.
NTC Network congestion/
OAB Operator aborted.
OCC Subscriber is occupied.
OOO Out of order.
PAD Packet assembler/disassembler.
PRC Premature clearing.
PRF Protocol failure.
RCA Reverse charging acceptance not subscribed.
REF There was a failure in the remote equipment.
RLE Resource limit exceeded.
RPE Remote procedure error.
RPO RPOA out of order.
SCC Call completed successfully.
SHE MES hardware error.
SNF The satellite network has failed.
SPE MES protocol error.
SUC Test results being delivered.
TBY Trunks busy.
TGR TDM group reset.
TIM Time-out.
TMD Too many destinations.
UNK Unknown. Is used when no other failure codes are suitable.
WFA Wrong final answer-back.
WIA Wrong initial answer-back.
ABS Absent subscriber. The mobile terminal is not logged in to the ocean region.
ACB Access barred.
ADR Addressee refuses to accept message.
ANU Deleted. The message has not been delivered within an hour and is therefore deleted.
ATD Attempting to deliver the message.
BK Message aborted. Is used when a fax or PSTN-connection is cleared abnormally.
BUS Busy.
CCD Call cut or disconnected.
CI Conversation impossible.
CIE The LESO ran out of processing/communications capacity to process the message.
CNS Call not started.
DTE Data terminal equipment. Used when an X.25 subscriber has cleared the connection during the call attempt.
ERR Error.
FAU Faulty.
FMT Format error.
FSA Fast select acceptance not subscribed.
IAB Invalid answer-back from destination.
IAM Was unable to process the address information in the following message:
IDS Invalid data from ship.
IDT Input data time-out.
IFR Invalid facility request.
IMS Message size is invalid; 7,932 characters maximum.
IND Incompatible destination.
INH Was unable to establish the type of message from the following header:
INV Invalid.
ISR Invalid ship request.
LDE Maximum acceptable message length or duration has been exceeded.
LEF Local equipment failure.
LPE Local procedure error.
MBB Message broken by higher priority.
Listed below is a selection of non-delivery notification (NDN) codes used by some Inmarsat-C LESOs.
In addition to, or instead of, these codes, some LESOs may use their own codes or messages.
To find out the particular NDN codes/messages used by a specific LESO, and their meanings, contact the LESO directly at its number.
NDN code Meaning
MCC Message channel congestion.MCF Message channel failure.
MKO Message killed by operator.
MSO Machine switched off.
NA Correspondence with this subscriber is not permitted.
NAL No address line is present.
NC No circuits.
NCH Subscribers number has changed.
NDA No delivery was attempted.
NFA No final answer-back.
NIA No initial answer-back.
NOB Not obtainable.
NOC No connection.
NP No party. The called party is not, or is no longer, a subscriber.
NTC Network congestion/
OAB Operator aborted.
OCC Subscriber is occupied.
OOO Out of order.
PAD Packet assembler/disassembler.
PRC Premature clearing.
PRF Protocol failure.
RCA Reverse charging acceptance not subscribed.
REF There was a failure in the remote equipment.
RLE Resource limit exceeded.
RPE Remote procedure error.
RPO RPOA out of order.
SCC Call completed successfully.
SHE MES hardware error.
SNF The satellite network has failed.
SPE MES protocol error.
SUC Test results being delivered.
TBY Trunks busy.
TGR TDM group reset.
TIM Time-out.
TMD Too many destinations.
UNK Unknown. Is used when no other failure codes are suitable.
WFA Wrong final answer-back.
WIA Wrong initial answer-back.
Last modified: Saturday, 25 April 2020, 7:50 PM