Ministry of Defence bespoke secure system which provides the network to carry the UNITER secure telecommunications system. | |
A method of connecting voice and data telecommunications. When a user makes a transmission, a circuit is established in an exchange, and this connects the user with the intended recipient for the duration of the transmission. The two users then have exclusive use of the circuit until the connection is released. Contrast with POINT-TO-POINT where permanent connections exist. | |
Restricted and secret electronic mail and office administration system for the Department's administrative centre and some headquarters. | |
An Executive Agency of the Ministry of Defence, set up to manage the Department's telecommunications. Their responsibility includes liaison with BT concerning performance of the Defence Fixed Telecommunications System. | |
Defence Fixed Telecommunications System. | |
A network designed to provide user communication within a defined building or site. | |
This service connects the Local Area Networks in various sites, allowing communications between them. Separate tariffs operate for each of Restricted and Secret Local Area Network Interconnect security levels. | |
A system which transmits data in "packets", thus allowing more efficient use of the network as paths in the network can be shared with other users. The data are broken up into small groups or packets. Unlike in circuit switching, there is no physical circuit, but the data share a "virtual circuit" with other users. Only used for data transmission in the Defence Fixed Telecommunications System. | |
Terminals are linked by permanent physical circuits. Less complex than circuit switched networks, and quick in response time. But inefficient in resource use as lines still exist but lie dormant when not in use, rather than being formed specifically for a particular communication as with circuit switching. May be used for voice and data transmission. | |
A computer program and/or processor that provides a service to users on a LOCAL AREA NETWORK; for example, accessing a file or controlling a printer. | |
The utilization or capacity of a telecommunications system. Traffic is described in terms of the number of calls. The number of calls in progress at any time is referred to as instantaneous traffic. | |
The amount of traffic over a given period of time in a telecommunications system. | |
A Ministry of Defence bespoke secure system, forming part of the Minimum Military Core. The system has Electro-Magnetic Pulse Protection which provides security of telecommunications in the event of a nuclear attack. | |
Data packets share paths through a network during PACKET SWITCHING transmissions. Although there is no physical circuit between the users, the path used for any particular transmission is referred to as a Virtual Circuit. | |
A data communications network, which covers long distances. In this project, this would provide links between towns and between the Department's sites. | |
Telecommunications services carried over a Wide Area Network; for example, between Ministry of Defence bases. |