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3153 Communication medium type code [C]
Desc: Code specifying the type of communication medium.
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
The cable is used as communication medium.
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
GEIS mailbox system is used as communication medium.
IE IBM information exchange
IBM IE is used as communication medium.
IM Internal mail
Internal mail address/number.
MA Mail
Postal service document delivery.
PB Postbox no.
Postbox system is used as communication medium.
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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