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.

Internal mail address/number.

Communications address assigned by society for worldwide interbank financial telecommunications s.c.

Peripheral device identification.

Communications number assigned by aeronautical radio inc.

Self explanatory.

At&t mailbox identifier.

Transmission of text/data via teletext.

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.

Communications number assigned by societe internationale de telecommunications aeronautiques (sita).

Device used for transmitting and reproducing fixed graphic material (as printing) by means of signals over telephone lines or other electronic transmission media.

Ccitt message handling system.

The switched telecommunications network of the united states government.

Voice/data transmission by telephone.

Postal service document delivery.

Number identifying the service and service user.

Self explanatory.

The switched telecommunications network of the united states department of defense.

According to iso.

Self explanatory.

Self explanatory.

Telephone extension.

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).

Transmission of text/data via telex.

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).

Text transmission via telegraph.

Transmission of text/data via telemail.