D99B Code List 3155

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AA
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
Communications number assigned by Societe Internationale de Telecommunications Aeronautiques (SITA).
AC
Communications number assigned by Aeronautical Radio Inc.
AD
AT&T mailbox identifier.
AE
Peripheral device identification.
AF
The switched telecommunications network of the United States Department of Defense.
AG
The switched telecommunications network of the United States government.
AH
Data exchange via the World Wide Web.
AI
Identifies that portion of an international telephone number representing the country code to be used when calling internationally.
AJ
Identifies the alternate telephone number.
AK
Code that identifies the communications number for the online videotex service.
AL
Identifies the cellular phone number.
AM
Telephone number, including country and/or city code as required, for voice or data transmission by telephone beyond the border of a country.
AN
ODETTE File Transfer Protocol.
CA
Self explanatory.
EI
Number identifying the service and service user.
EM
Exchange of mail by electronic means.
EX
Telephone extension.
FT
According to ISO.
FX
Device used for transmitting and reproducing fixed graphic material (as printing) by means of signals over telephone lines or other electronic transmission media.
GM
Self explanatory.
IE
Self explanatory.
IM
Internal mail address/number.
MA
Postal service document delivery.
PB
Self explanatory.
PS
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
Communications address assigned by Society for Worldwide Interbank Financial Telecommunications s.c.
TE
Voice/data transmission by telephone.
TG
Text transmission via telegraph.
TL
Transmission of text/data via telex.
TM
Transmission of text/data via telemail.
TT
Transmission of text/data via teletext.
TX
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
CCITT Message handling system.