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Jargon Buster
The du Pré Jargon Buster found the following for - NNos A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Term
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Explanation
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| N/A | A commonly used term. Not available | |
| NcoP | Code of practice for the Design of Private Telecommunication Networks. Currently under review by the NICC | |
| NDS | 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 | |
| NEMA | American National Electrical Manufacturers Association | |
| Net Bios | 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 | |
| NetView | The IBM SNA network management product was announced in mid-1986. It started life as a rather half-hearted bundling of various network management products including NCCF, NLDM, MPDA, VTAM Node control application and NMPF | |
| NetWare | LAN networking products including an operating system developed by Novell Inc | |
| Network | The equipment and transmission facilities for communication between computer systems | |
| Network Layer | 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 | |
| Network Operating System | NOS | |
| NEXT | Near End Cross Talk. A condition when cables are too close to one another, thereby encouraging cross talk | |
| NGN | Next Generation Network. An NGN will replace all existing cabled networks into one. See 21CN. | |
| NIC | Network Interface Card. Typically, an ISA or PCMCIA card | |
| NiCad | Usually refers to a rechargeable Nickel Cadmium battery. The problem with NiCad batteries is that if recharged before being fully discharged, the storage capacity, and hence the life, reduces significantly. This is a well know ‘chemical memory’ problem associated with NiCad batteries | |
| NICC | Network Interconnection Co-ordination Committee | |
| NiMH | Usually refers to a rechargeable Nickel Metal Hydride battery. A Nimh battery does not suffer from the same ‘chemical memory’ problem associated with NiCad batteries | |
| NLM | Netware Loadable Module | |
| NNI | A Frame Relay term. Network-Network Interface. The interface between frame relay switches in the providers frame relay network | |
| Node | A piece of hardware which makes up part of a network, such as computer, server, printer | |
| Non-Blocking | Where sufficient Speech Paths exist such that the Network Engaged Tone would never be generated | |
| Non-contiguous | A telephony term meaning non-consecutive, relating to telephone numbers | |
| Non-parity memory | Memory that has no parity to check for errors | |
| NOS | Network Operating System. Enables users to access files, print documents, and communicate with one another on the network | |
| Notified Body | A company or organisation that performs testing services with which BSI has a working relationship | |
| NT | Network Termination. A PTO term | |
| NT1 | Network Termination 1. The first termination point of the PTO’s ISDN line. Normally, the PTO’s ISDN line box. Forms the interface between the PTO and the CPE. The NT1 sits between the U and the T or S/T reference points. The NT1 for a PRA line may require a mains supply. However, if PRA is supplied by the PTO using three copper pairs, the PTO’s local exchange will usually supply power at 120 volts DC with a feeding current limited to 48mA, in which case a mains supply is not required for the NT1. As an alternative, if the NT1 is powered from a local mains supply the PTO’s exchange power may be reduced to 50 volts DC with a whetting current of 5 to 10mA. | |
| NT2 | Network Termination 2. The customer’s switching device – e.g. the PBX. Sits after the T reference point | |
| NTE | Network Termination Equipment | |
| NTE5 | The BT master socket for a DEL | |
| NTE9 | The BT NTE for their BT Highway product, which combines ISDN2e with a PSTN line | |
| NTP | i) Network Termination Point. Typically, an interface between BT and a 3rd party ii) Network Time Protocol. An Internet standard protocol which enables client computers to maintain system time synchronization to the US Naval Observatory Master Clocks in Washington, DC and Colorado Springs, Colorado |
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| NTR | National Test Requirement. Standards set by ETSI | |
| NTS | Novell Telephony Services | |
| NTTA | Network Termination and Testing Apparatus | |
| NTTP | Network Test and Termination Point. Typically, the interface between equipment provided by two suppliers. For example, i) BT terminates its PSTN lines on an NTTP, as the interface between BT and a 3rd party provided telephone system ii) The ports of a du Pré installed telephone system would be cabled to a DP (NTTP) as the interface between du Pré and a 3rd party installed cabling system |
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| NTU | Network Terminating Unit | |
| Number Portability | see Telephone Number Portability | |
| NVP | Normal Velocity of Propagation. Used to describe the speed at which signals travel in a conductor, relative to the speed of light. Conductors are given a factor value, a ‘c’ rating. For example, the ‘c’ rating of Cat 5e cable might be 0.72, which shows that signals in that cable travel at 72% of the speed of light |