Code specifying the type of communication medium.
Type
String (AN)
Length
Max 3 / Min 1
Codes
<> 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.
<> AE
Express post
Express (e.g. overnight) postal service document delivery.
<> 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.
