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.
