United Nations Directories for Electronic Data Interchange for
Administration, Commerce and Transport
UN/EDIFACT
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Change indicators
a plus sign (+) for an addition
an asterisk (*) for an amendment to structure
a hash sign (#) for changes to names
a vertical bar (|) for changes to text for descriptions and
notes
a minus sign (-) for marked for deletion (within either
batch and interactive messages)
a X sign (X) for marked for deletion (within both batch
and interactive messages)
#| 3153 Communication medium type code [C]
| Desc: Code specifying the type of communication medium.
Repr: an..3
Repr: an..3
AA Circuit switching
A process that, on demand, connects two or more
data terminal equipments and permits the exclusive
use of a data circuit between them until the
connection is released (ISO).
AB SITA
Communications number assigned by Societe
Internationale de Telecommunications Aeronautiques
(SITA).
AC ARINC
Communications number assigned by Aeronautical
Radio Inc.
AD Courier
A communication channel identifying a courier.
CA Cable address
Self explanatory.
EI EDI transmission
Number identifying the service and service user.
EM Electronic mail
Exchange of mail by electronic means.
EX Extension
Telephone extension.
FT File transfer access method
According to ISO.
FX Telefax
Device used for transmitting and reproducing fixed
graphic material (as printing) by means of signals
over telephone lines or other electronic
transmission media.
GM GEIS (General Electric Information Service) mailbox
Self explanatory.
IE IBM information exchange
Self explanatory.
IM Internal mail
Internal mail address/number.
MA Mail
Postal service document delivery.
PB Postbox no.
Self explanatory.
PS Packet switching
The process of routing and transferring data by
means of addressed packets so that a channel is
occupied only during the transmission; upon
completion of the transmission the channel is made
available for the transfer of other packets (ISO).
SW S.W.I.F.T.
Communications address assigned by Society for
Worldwide Interbank Financial Telecommunications
s.c.
TE Telephone
Voice/data transmission by telephone.
TG Telegraph
Text transmission via telegraph.
TL Telex
Transmission of text/data via telex.
TM Telemail
Transmission of text/data via telemail.
TT Teletext
Transmission of text/data via teletext.
TX TWX
Communication service involving Teletypewriter
machines connected by wire or electronic
transmission media.
Teletypewriter machines are the devices used to
send and receive signals and produce hardcopy from
them.
XF X.400
CCITT Message handling system.
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Data Element Cross Reference
DataElement 3153 is used in the following Batch Segments:
DOC
DataElement 3153 is used in the following Interactive Composite Elements:
E024 E966
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