D921


Message D921/IFTMCS

Instruction Contract Status Message

A message from the party providing the transport/forwarding services to the party that issued the instructions for those services stating the actual details, terms and conditions (charges when applicable) of the service and of the consignment involved. In addition it can be used for the exchange of contract information between carriers mutually.

Message description

UNH

M(1) : Message header

A service segment starting and uniquely identifying the message. Note: Instruction Contract Status messages conforming to this document must contain the following data in segment UNH, composite S009: Data element 0065 IFTMCS 0052 1 0054 921 0051 UN

BGM

M(1) : Beginning of message

A segment to indicate the beginning of a message and to transmit identifying number and type of the message.

CTA

C(1) : Contact information

A segment to identify a person or department to whom communication should be directed.

COM

C(9) : Communication contact

A segment to identify a communication number of a personor department to whom communication should be directed.

DTM

C(9) : Date/time/period

A segment to indicate a date and time applying to the whole message, e.g., date and time of document issue.

TSR

C(9) : Transport service requirements

A segment to identify the contract, conditions of carriage, services, and priority requirements for the transport.

CUX

C(9) : Currencies

A segment to indicate default currencies and exchange rates.

MOA

C(99) : Monetary amount

A segment to indicate a monetary value for entire consignment, e.g. insured value, invoice amount, disbursements, etc.

FTX

C(99) : Free text

A segment to specify free form or processable supplementary information, such as status of transport, remarks to be printed on the transport documents (where required), consignment remarks, insurance instructions, etc., or any other additional information.

CNT

C(9) : Control total

A segment to specify totals for a consignment.

SG1 C(99) : LOC-DTM

A group of segments to specify locations and related date(s)/time(s) which apply to the entire message, e.g. place of transhipment.

LOC

M(1) : Place/location identification

A segment to identify a location applying to the entire message.

DTM

C(9) : Date/time/period

A segment to indicate date(s) and time(s) relating to the location.

SG2 C(1) : TOD-LOC

A group of segments to specify terms of delivery and related locations.

TOD

M(1) : Terms of delivery

A segment to specify the applicable terms of delivery.

LOC

C(9) : Place/location identification

A segment to specify a location related to the terms of delivery.

SG3 C(99) : RFF-DTM

A group of segments containing a reference and constants which apply to the entire message.

RFF

M(1) : Reference

A segment to express a reference which applies to the entire message such as: the document/message number that is to be updated by this very message (according to data element 1225 Message Function, Coded in segment BGM), booking reference, order number, insurance contract, etc.

DTM

C(9) : Date/time/period

A segment to indicate date and time relating to the reference.

SG4 C(9) : GOR-SG5

A group of segments to identify customs and other governmental procedures and required documents.

GOR

M(1) : Governmental requirements

A segment to indicate applicable governmental procedures related to import, export and transport of the goods.

SG5 C(9) : DOC-DTM

A group of segments to specify required documents by government.

DOC

M(1) : Document/message details

A segment to indicate a document required by government.

DTM

C(1) : Date/time/period

A segment to specify the date/time related to the required document.

SG6 C(9) : CPI-CUX-LOC-MOA

A group of segments to indicate charge methodology which applies to the entire message.

CPI

M(1) : Charge payment instructions

A segment to indicate default charge methodology.

CUX

C(1) : Currencies

A segment to specify the payment currency related to the charge methodology.

LOC

C(9) : Place/location identification

A segment to identify the place of charge collection.

MOA

C(9) : Monetary amount

A segment to identify the monetary amount associated with the charges.

SG7 C(99) : TCC-LOC-FTX-CUX-PRI-EQN-PCD-MOA-QTY

A group of segments to specify charge calculations associated with the transport.

TCC

M(1) : Transport charge/rate calculations

A segment to specify charge.

LOC

C(1) : Place/location identification

A segment to indicate a location.

FTX

C(1) : Free text

A segment to specify processable supplementary information associated with charge.

CUX

C(1) : Currencies

A segment to specify currencies associated with charge.

PRI

C(1) : Price details

A segment to specify price details such as price (e.g.100 dollar) and unit price basis (e.g. per 1000 kilogram).

EQN

C(1) : Number of units

A segment to specify the number of units to which the unit price basis applies.

PCD

C(1) : Percentage details

A segment to indicate the applicable reduction or surcharge percentage details.

MOA

C(9) : Monetary amount

A segment to specify a monetary amount, such as prepaid amount, discount or total amount.

QTY

C(9) : Quantity

A segment to indicate a quantity, for example actual weight, declared weight or chargeable weight.

SG8 M(99) : TDT-DTM-TSR-LOC-SG9

A group of segments to indicate details of the movement of goods such as mode and means of transport, locations, departure, and arrival date(s) and time(s).

TDT

M(1) : Details of transport

A segment to indicate information related to a certain stage of the transport, such as mode, means and carrier.

DTM

C(9) : Date/time/period

A segment to indicate departure/arrival date and time.

TSR

C(9) : Transport service requirements

A segment to identify contract, conditions of carriage, services, priority requirements for this stage of transport.

LOC

C(99) : Place/location identification

A segment to indicate a location such as origin, destination, stop off, etc. related to this leg of transport.

SG9 C(9) : RFF-DTM

A group of segments to specify an additional reference related to the stage of the transport.

RFF

M(1) : Reference

A segment to specify the additional reference.

DTM

C(1) : Date/time/period

A segment to identify date and time relating to the reference.

SG10 C(99) : NAD-LOC-MOA-SG11-SG12-SG13-SG14-SG15

A group of segments to identify a party, related references, locations contacts, required documents, and charges to be paid by the party.

NAD

M(1) : Name and address

A segment to identify the party's name, address, and function.

LOC

C(9) : Place/location identification

A segment to indicate location where a specific function will be performed.

MOA

C(9) : Monetary amount

A segment to identify the monetary amount associated with the party.

SG11 C(9) : CTA-COM

A group of segments identifying a contact and its communications related to the party.

CTA

M(1) : Contact information

A segment to identify a person or department within a party.

COM

C(9) : Communication contact

A segment to identify a communication number of a person or department to whom communication should be directed.

SG12 C(9) : DOC-DTM

A group of segments to identify required documents.

DOC

M(1) : Document/message details

A segment to identify a document required of, by or for the party.

DTM

C(1) : Date/time/period

A segment to identify date and time relating to the reference.

SG13 C(99) : TCC-PRI-EQN-PCD-MOA-QTY

A group of segments to specify charges associated with the party.

TCC

M(1) : Transport charge/rate calculations

A segment to specify charges associated with the party.

PRI

C(1) : Price details

A segment to specify price details such as price (e.g. 100 dollar) and unit price basis (e.g. per 1000 kilogram).

EQN

C(1) : Number of units

A segment to specify the number of units to which the unit price basis applies.

PCD

C(1) : Percentage details

A segment to indicate the applicable reduction or surcharge percentage details.

MOA

C(9) : Monetary amount

A segment to specify a monetary amount, such as prepaid amount, discount or total amount.

QTY

C(9) : Quantity

A segment to indicate a quantity, for example actual weight, declared weight or chargeable weight.

SG14 C(9) : RFF-DTM

A group of segments to specify a reference related to the party.

RFF

M(1) : Reference

A segment to identify a reference used by a party.

DTM

C(9) : Date/time/period

A segment to indicate date and time relating to the reference.

SG15 C(9) : CPI-CUX-LOC-MOA

A group of segments to identify the charge and its amount to be paid by the party.

CPI

M(1) : Charge payment instructions

A segment to identify default charge methodology.

CUX

C(1) : Currencies

A segment to indicate payment currency related to the charge methodology.

LOC

C(9) : Place/location identification

A segment to identify the place of charge collection.

MOA

C(9) : Monetary amount

A segment to identify the monetary amount associated with the charges.

SG16 C(999) : GID-HAN-TMP-RNG-TMD-LOC-MOA-PIA-FTX-SG17-SG18-SG19-SG20-SG21-SG22-SG23-SG24-SG26-SG28-SG29

A group of segments to describe the goods items for which transport is undertaken.

GID

M(1) : Goods item details

A segment to identify a goods item for which transport is undertaken. A goods item can be identified by up to three levels of packaging.

HAN

C(1) : Handling instructions

A segment to specify handling instructions relating to the goods item.

TMP

C(1) : Temperature

A segment to specify a temperature setting for a goods item.

RNG

C(1) : Range details

A segment to specify a temperature range setting for a goods item.

TMD

C(1) : Transport movement details

A segment to specify transport movement details for a goods item.

LOC

C(9) : Place/location identification

A segment to specify a country associated with a goods item, such as country of origin, or country of destination.

MOA

C(9) : Monetary amount

A segment to specify a monetary amount associated with a goods item, such as declared value, FOB value, etc.

PIA

C(9) : Additional product id

A segment to specify article numbers.

FTX

C(9) : Free text

A segment to specify processable supplementary information relating to the goods item.

SG17 C(9) : NAD-DTM

A group of segments to identify different places of collection and/or delivery for the goods item.

NAD

M(1) : Name and address

A segment to specify an address of a place of collection or delivery for a goods item.

DTM

C(1) : Date/time/period

A segment to indicate date and time relating to the place of collection or delivery.

SG18 C(9) : GDS-FTX

A group of segments to describe the goods item.

GDS

M(1) : Nature of cargo

A segment to describe the goods item.

FTX

C(1) : Free text

A segment to describe the goods item.

SG19 C(99) : MEA-EQN

A group of segments to specify measurements applicable to a goods item.

MEA

M(1) : Measurements

A segment to specify measurements, other than dimensions, applicable to a goods item.

EQN

C(1) : Number of units

A segment to specify the number of equipment units to each of which the given measurement applies.

SG20 C(99) : DIM-EQN

A group of segments to specify dimensions applicable to a goods item.

DIM

M(1) : Dimensions

To specify dimensions applicable to a goods item.

EQN

C(1) : Number of units

A segment to specify the number of equipment units to each of which the given dimension applies.

SG21 C(9) : RFF-DTM

A group of segments to identify references to a goods item.

RFF

M(1) : Reference

A segment to identify a reference to a goods item.

DTM

C(9) : Date/time/period

A segment to indicate date and time relating to the reference.

SG22 C(9) : PCI-RFF-DTM

A group of segments to specify marks and numbers of a goods item.

PCI

M(1) : Package identification

A segment to specify marks and numbers of a good item.

RFF

C(1) : Reference

A segment to identify a reference relating to the marks and numbers.

DTM

C(1) : Date/time/period

A segment to identify date and time of the reference.

SG23 C(9) : DOC-DTM

A group of segments to specify documents and associated date(s) and time(s) for a goods item.

DOC

M(1) : Document/message details

A segment to specify a document prepared for a goods item.

DTM

C(9) : Date/time/period

A segment to associate date and time with the prepared document.

SG24 C(9) : TPL-SG25

A group of segments to identify transport details and associated measurements for a goods item. This group may be repeated to indicate the different phases of the movement.

TPL

M(1) : Transport placement

A segment to identify transport details for a goods item.

SG25 C(9) : MEA-EQN

A group of segments to identify measurements.

MEA

M(1) : Measurements

A segment to specify the distribution of a goods item among the transport details.

EQN

C(1) : Number of units

A segment to specify the number of equipment units to each of which the given measurement applies.

SG26 C(999) : SGP-SG27

A group of segments to specify the distribution of a goods item among the transport equipment.

SGP

M(1) : Split goods placement

A segment to identify the equipment in which goods are transported.

SG27 C(9) : MEA-EQN

A group of segments to identify measurements.

MEA

M(1) : Measurements

A segment to specify measurements of that portion of the goods item in the equipment.

EQN

C(1) : Number of units

A segment to specify the number of equipment units to each of which the given measurement applies.

SG28 C(99) : TCC-PRI-EQN-PCD-MOA-QTY-LOC

A group of segments to specify charge associated with the goods item.

TCC

M(1) : Transport charge/rate calculations

A segment to specify charge associated with the goods item.

PRI

C(1) : Price details

A segment to specify price details such as price (e.g. 100 dollar) and unit price basis (e.g. per 1000 kilogram).

EQN

C(1) : Number of units

A segment to specify the number of units to which the unit price basis applies.

PCD

C(1) : Percentage details

A segment to indicate the applicable reduction or surcharge percentage details.

MOA

C(9) : Monetary amount

A segment to specify a monetary amount, such as prepaid amount, discount or total amount.

QTY

C(9) : Quantity

A segment to indicate a quantity, for example actual weight, declared weight or chargeable weight.

LOC

C(9) : Place/location identification

A segment to indicate location where a specific function will be performed.

SG29 C(9) : DGS-FTX-SG30-SG31-SG32

A group of segments to specify dangerous goods details related to the goods item. One goods item may be in different dangerous goods classes.

DGS

M(1) : Dangerous goods

A segment to indicate the class of dangerous goods, packing group, etc.

FTX

C(99) : Free text

A segment to specify the dangerous goods technical name and to specify any additional dangerous goods information.

SG30 C(9) : CTA-COM

A group of segments to identify a contact to whom communication regarding the dangerous goods can be directed.

CTA

M(1) : Contact information

A segment to identify a person or department.

COM

C(9) : Communication contact

A segment to identify a communication number of a person or department.

SG31 C(9) : MEA-EQN

A group of segments to identify dangerous goods measurements.

MEA

M(1) : Measurements

A segment to specify measurements of the dangerous goods.

EQN

C(1) : Number of units

A segment to specify the number of equipment units to each of which the given measurement applies.

SG32 C(999) : SGP-SG33

A group of segments to specify the distribution of the dangerous goods among the transport equipment.

SGP

M(1) : Split goods placement

A segment to identify the equipment in which the dangerous goods are transported.

SG33 C(9) : MEA-EQN

A group of segments to identify dangerous goods measurements.

MEA

M(1) : Measurements

A segment to specify measurements of that portion of the dangerous goods in the equipment.

EQN

C(1) : Number of units

A segment to specify the number of equipment units to each of which the given measurement applies.

SG34 C(999) : EQD-EQN-TMD-MEA-DIM-SEL-TPL-FTX-SG35-SG36-SG37

A group of segments to specify equipment in which goods are transported.

EQD

M(1) : Equipment details

A segment to specify equipment, and equipment size and type used in the transport.

EQN

C(1) : Number of units

A segment to specify number of pieces of equipment required.

TMD

C(1) : Transport movement details

A segment to specify transport movement details for the equipment.

MEA

C(9) : Measurements

A segment to specify measurements, other than dimensions, associated with the equipment, such as weight.

DIM

C(9) : Dimensions

A segment to specify dimensions applicable to equipment.

SEL

C(99) : Seal number

A segment to identify seal and seal issuer associated with the equipment.

TPL

C(9) : Transport placement

A segment to identify transport details for the equipment.

FTX

C(9) : Free text

A segment to specify processable supplementary information associated with the equipment.

SG35 C(99) : TCC-PRI-EQN-PCD-MOA-QTY

A group of segments to specify charges associated with the equipment.

TCC

M(1) : Transport charge/rate calculations

A segment to specify a charge associated with the equipment.

PRI

C(1) : Price details

A segment to specify price details such as price (e.g. 100 dollar) and unit price basis (e.g. per 1000 kilogram).

EQN

C(1) : Number of units

A segment to specify the number of units to which the unit price basis applies.

PCD

C(1) : Percentage details

A segment to indicate the applicable reduction or surcharge percentage details.

MOA

C(9) : Monetary amount

A segment to specify a monetary amount, such as prepaid amount, discount or total amount.

QTY

C(9) : Quantity

A segment to indicate a quantity, for example actual weight, declared weight or chargeable weight.

SG36 C(9) : NAD-DTM

A group of segments to identify different equipment pick-up or drop-off places.

NAD

M(1) : Name and address

A segment to specify a pick-up or drop-off address.

DTM

C(1) : Date/time/period

A segment to indicate date and time relating to pick-up or drop-off.

SG37 C(99) : EQA-EQN

A group of segments to specify the attached equipment and related number of pieces.

EQA

M(1) : Attached equipment

A segment to identify attached or related equipment such as a chassis attached to a container.

EQN

C(1) : Number of units

A segment to specify number of pieces of equipment required.

UNT

M(1) : Message trailer

A service segment ending a message, giving the total number of segments in the message and the control reference number of the message.

Message structure

UNH, Message header                           M        1
BGM, Beginning of message                     M        1
CTA, Contact information                      C        1
COM, Communication contact                    C        9
DTM, Date/time/period                         C        9
TSR, Transport service requirements           C        9
CUX, Currencies                               C        9
MOA, Monetary amount                          C       99
FTX, Free text                                C       99
CNT, Control total                            C        9

--- Segment Group 1 ------------------------- C       99 -------+
LOC, Place/location identification            M        1        |
DTM, Date/time/period                         C        9        |
---- -----------------------------------------------------------+

--- Segment Group 2 ------------------------- C        1 -------+
TOD, Terms of delivery                        M        1        |
LOC, Place/location identification            C        9        |
---- -----------------------------------------------------------+

--- Segment Group 3 ------------------------- C       99 -------+
RFF, Reference                                M        1        |
DTM, Date/time/period                         C        9        |
---- -----------------------------------------------------------+

--- Segment Group 4 ------------------------- C        9 -------+
GOR, Governmental requirements                M        1        |
                                                                |
--- Segment Group 5 ------------------------- C        9 ------+|
DOC, Document/message details                 M        1       ||
DTM, Date/time/period                         C        1       ||
---- ----------------------------------------------------------++

--- Segment Group 6 ------------------------- C        9 -------+
CPI, Charge payment instructions              M        1        |
CUX, Currencies                               C        1        |
LOC, Place/location identification            C        9        |
MOA, Monetary amount                          C        9        |
---- -----------------------------------------------------------+

--- Segment Group 7 ------------------------- C       99 -------+
TCC, Transport charge/rate calculations       M        1        |
LOC, Place/location identification            C        1        |
FTX, Free text                                C        1        |
CUX, Currencies                               C        1        |
PRI, Price details                            C        1        |
EQN, Number of units                          C        1        |
PCD, Percentage details                       C        1        |
MOA, Monetary amount                          C        9        |
QTY, Quantity                                 C        9        |
---- -----------------------------------------------------------+

--- Segment Group 8 ------------------------- M       99 -------+
TDT, Details of transport                     M        1        |
DTM, Date/time/period                         C        9        |
TSR, Transport service requirements           C        9        |
LOC, Place/location identification            C       99        |
                                                                |
--- Segment Group 9 ------------------------- C        9 ------+|
RFF, Reference                                M        1       ||
DTM, Date/time/period                         C        1       ||
---- ----------------------------------------------------------++

--- Segment Group 10 ------------------------ C       99 -------+
NAD, Name and address                         M        1        |
LOC, Place/location identification            C        9        |
MOA, Monetary amount                          C        9        |
                                                                |
--- Segment Group 11 ------------------------ C        9 ------+|
CTA, Contact information                      M        1       ||
COM, Communication contact                    C        9       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 12 ------------------------ C        9 ------+|
DOC, Document/message details                 M        1       ||
DTM, Date/time/period                         C        1       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 13 ------------------------ C       99 ------+|
TCC, Transport charge/rate calculations       M        1       ||
PRI, Price details                            C        1       ||
EQN, Number of units                          C        1       ||
PCD, Percentage details                       C        1       ||
MOA, Monetary amount                          C        9       ||
QTY, Quantity                                 C        9       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 14 ------------------------ C        9 ------+|
RFF, Reference                                M        1       ||
DTM, Date/time/period                         C        9       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 15 ------------------------ C        9 ------+|
CPI, Charge payment instructions              M        1       ||
CUX, Currencies                               C        1       ||
LOC, Place/location identification            C        9       ||
MOA, Monetary amount                          C        9       ||
---- ----------------------------------------------------------++

--- Segment Group 16 ------------------------ C      999 -------+
GID, Goods item details                       M        1        |
HAN, Handling instructions                    C        1        |
TMP, Temperature                              C        1        |
RNG, Range details                            C        1        |
TMD, Transport movement details               C        1        |
LOC, Place/location identification            C        9        |
MOA, Monetary amount                          C        9        |
PIA, Additional product id                    C        9        |
FTX, Free text                                C        9        |
                                                                |
--- Segment Group 17 ------------------------ C        9 ------+|
NAD, Name and address                         M        1       ||
DTM, Date/time/period                         C        1       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 18 ------------------------ C        9 ------+|
GDS, Nature of cargo                          M        1       ||
FTX, Free text                                C        1       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 19 ------------------------ C       99 ------+|
MEA, Measurements                             M        1       ||
EQN, Number of units                          C        1       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 20 ------------------------ C       99 ------+|
DIM, Dimensions                               M        1       ||
EQN, Number of units                          C        1       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 21 ------------------------ C        9 ------+|
RFF, Reference                                M        1       ||
DTM, Date/time/period                         C        9       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 22 ------------------------ C        9 ------+|
PCI, Package identification                   M        1       ||
RFF, Reference                                C        1       ||
DTM, Date/time/period                         C        1       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 23 ------------------------ C        9 ------+|
DOC, Document/message details                 M        1       ||
DTM, Date/time/period                         C        9       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 24 ------------------------ C        9 ------+|
TPL, Transport placement                      M        1       ||
                                                               ||
--- Segment Group 25 ------------------------ C        9 -----+||
MEA, Measurements                             M        1      |||
EQN, Number of units                          C        1      |||
---- ---------------------------------------------------------++|
                                                                |
--- Segment Group 26 ------------------------ C      999 ------+|
SGP, Split goods placement                    M        1       ||
                                                               ||
--- Segment Group 27 ------------------------ C        9 -----+||
MEA, Measurements                             M        1      |||
EQN, Number of units                          C        1      |||
---- ---------------------------------------------------------++|
                                                                |
--- Segment Group 28 ------------------------ C       99 ------+|
TCC, Transport charge/rate calculations       M        1       ||
PRI, Price details                            C        1       ||
EQN, Number of units                          C        1       ||
PCD, Percentage details                       C        1       ||
MOA, Monetary amount                          C        9       ||
QTY, Quantity                                 C        9       ||
LOC, Place/location identification            C        9       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 29 ------------------------ C        9 ------+|
DGS, Dangerous goods                          M        1       ||
FTX, Free text                                C       99       ||
                                                               ||
--- Segment Group 30 ------------------------ C        9 -----+||
CTA, Contact information                      M        1      |||
COM, Communication contact                    C        9      |||
---- ---------------------------------------------------------+||
                                                               ||
--- Segment Group 31 ------------------------ C        9 -----+||
MEA, Measurements                             M        1      |||
EQN, Number of units                          C        1      |||
---- ---------------------------------------------------------+||
                                                               ||
--- Segment Group 32 ------------------------ C      999 -----+||
SGP, Split goods placement                    M        1      |||
                                                              |||
--- Segment Group 33 ------------------------ C        9 ----+|||
MEA, Measurements                             M        1     ||||
EQN, Number of units                          C        1     ||||
---- --------------------------------------------------------++++

--- Segment Group 34 ------------------------ C      999 -------+
EQD, Equipment details                        M        1        |
EQN, Number of units                          C        1        |
TMD, Transport movement details               C        1        |
MEA, Measurements                             C        9        |
DIM, Dimensions                               C        9        |
SEL, Seal number                              C       99        |
TPL, Transport placement                      C        9        |
FTX, Free text                                C        9        |
                                                                |
--- Segment Group 35 ------------------------ C       99 ------+|
TCC, Transport charge/rate calculations       M        1       ||
PRI, Price details                            C        1       ||
EQN, Number of units                          C        1       ||
PCD, Percentage details                       C        1       ||
MOA, Monetary amount                          C        9       ||
QTY, Quantity                                 C        9       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 36 ------------------------ C        9 ------+|
NAD, Name and address                         M        1       ||
DTM, Date/time/period                         C        1       ||
---- ----------------------------------------------------------+|
                                                                |
--- Segment Group 37 ------------------------ C       99 ------+|
EQA, Attached equipment                       M        1       ||
EQN, Number of units                          C        1       ||
---- ----------------------------------------------------------++
UNT, Message trailer                          M        1