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
AT&T mailbox
AT&T mailbox identifier.
AE
Peripheral device
Peripheral device identification.
CA
Cable address
Self explanatory.
EI
EDI transmission
Number identifying the service and service user.
EM
Electronic mail
Creating/sending/receiving of unstructured free text messages or documents using computer network, a mini- computer or an attached modem and regular telephone line or other electronic transmission media.
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 number
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.