Business telecommunications and IT systems

A commonly used term meaning Not Applicable.

A National-Call is a Non Geographic Number.

Normally beginning with 08, these are charged at more than a national call rate but again, are not as high as Premium Rate calls.

see Lo-Call and Freephone.

Code of practice for the Design of Private Telecommunication Networks.

Under review by the NICC.

Novell Directory Services.

NDS is the heart of Novell Netware version 4 and above, and is essentially a loosely consistent database which contains all the details of the users, groups and applications that require access to the network in an encrypted and secure format.

Any user or application that requires access to the network must authenticate through NDS, first. It is also the main source of access control for applications such as Border Manager, Groupwise etc.

Interference measured at the same end of the circuit as the transmitter.

Abbreviated to NEXT.

see CrossTalk.

American National Electrical Manufacturers Association.

Network Basic Input / Output System (Net Bios) developed by IBM.

It is an interface used by IBM PCs to access a network and its resources.

see NetView.

see NetWare.

see Net Bios.

Netscape Communications is a US computer services company best known for its web browser.

The name Netscape was a trademark of Cisco Systems granted to the company.

The IBM Systems Network Architecture (SNA) network management product was announced in mid-1986.

LAN networking products including an operating system developed by Novell.

A network is a medium designed to connect two or more equipments. For example,

i) A computer LAN

ii) British Telecom's telephone network.

iii) The Internet.

iv) A mobile phone network.

Different networks can be connected one to the other.

see 21CN

Layer three of the OSI model, the Network Layer ensures that in a multi-node network the blocks of data arrive at their destinations by use of the appropriate call set-up and routing procedures.

A Network Node is a connection point.

Either a redistribution point, or a communication endpoint which can be terminal equipment.

A physical network node is an active electronic device attached to a network capable of sending, receiving, or forwarding information over a communications channel.

Network Operating System.

Enables users to share access files, print documents, and communicate with one another on the network.

Typically a LAN or a private network.

Examples include: Novell Netware, Windows NT.

Abbreviated to NOS.

see Operating System.

A company which provides services for its subscribers.

Typically, a telephone company such as BT, or a mobile company such as Vodafone.

A formal description of digital message formats and the rules for exchanging those messages in or between computing systems and in telecommunications, and include signaling, authentication and error detection and correction capabilities.

Applies to both computing and telecommunications.

see Near End CrossTalk.