Tel: 0116 2426996
Tel: 0116 2426996
Tel: 0116 2426996

Jargon Buster

Stumped by industry jargon? Try our Jargon buster below.

A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | X | Y | Z


Access Server
An access server or Network Access Server link devices to a Local Area Network (LAN) or Wide Area Network (WAN). Internet service providers can provide customers with internet connectivity using the Access Server. The server provides user authentication and permits the flow between the user host and hosts.

Active Directory
The active directory gives information on objects including services, resources and users. The AD allows the control of security settings and access to the objects.

ADSL (Asymmetric Digital Subscriber Line)
A broadband service used mainly for accessing the Internet.

Analogue Lines
A conventional telephone line delivered on copper wiring also used for domestic lines. Analogue lines are different from ISDN lines.

Auto Attendant
Automated call technology that answers external calls and provides the caller with options for choosing the department they wish to speak to.

Aspire is the business telephone system from NEC, now end of life, but still supported by Dalys. For more information click here


Bandwidth is the size of a data connections capacity. It is usually measured in Kilobits per second (Kbps), Megabits per second (Mbps) or Gigabits per second (Gbps).

A term for fast internet access.


Call Barring
Stops specific calls being made from your phone system.

Call Diversion
a feature that enables you to divert calls to other phone systems.

Call Deflection
Lets you transfer a call over to another persons phone without having to answer it.

Call Hold
A service that enables a user to retain an existing call, while accepting another call on the same handset. It can also be used to park calls.

Call Park
A feature that allows a user to place an inbound call on hold from one telephone then pick it up with another handset from an allocated ‘park bay’.

Call Transfer 
A service feature that allows a user to place a call on hold whilst, simultaneously, transferring the call to another destination.

Caller Line Identity Presentation (CLIP)
Displays the number of the person calling before you pick up the phone, allowing you to greet them appropriately.

Calling Line Identity Presentation (CLIR)
This feature prevents your number being shown to people you are calling.

Call waiting
tells you if someone is trying to call when you’re already on the phone.

These fit into the slots that are found inside the phone system cabinet and determine the size and configuration of the system. Once all the slots have been used the system is full unless it is possible to expand it further by buying another phone system cabinet.

CDR – (Call detail record)
A data record created by a telephone exchange or other telecommunications equipment that documents the details of a telephone call.

Cloud Computing
Refers to a network of remote servers hosted on the internet rather than a local server or computer which are used to process, manage and store data.

CLI (Caller Line Identification)
The number of a specific telephone line.

Where an organisation keeps its servers in a server room in a third party data centre and uses a service provider to maintain their network connections.

IP convergence is the consolidation of networks (e.g. voice, data, video) into a single platform lowering the cost of networks and communications.

CPS (Carrier Pre-Select)
A system allowing clients to select their chosen ‘indirect’ carrier without the need of ‘smart boxes’ or least cost routing software.

CTI (Computer Telephony integration)
The linking of computers and telephone systems. The term covers a broad spectrum of applications, an example of which includes ‘screen popping’ where the information relating to the caller appears on the PC screen before or at the same time as the call is answered.


DACS (Digital Access Carrier System)
The technology that allows two lines to go down a single copper pair. Used if a customer needed an additional line. If DACS is running on your telephone line then you may have problems when it comes to having broadband on the same line. Ofcom have a set of guidelines should you be experiencing a problem.

DDI (Direct Dial Inwards)
A feature available on ISDN (see below) switchboards enabling callers to call people directly at their desks. Usually sold in blocks of 10 sequential numbers.

Digitally Enhanced Cordless Telecommunications, it is used to connect cordless mobile handsets to a wired telephone system.

Digital Card
A card in the phone system required for connecting digital (system) phones to the system.


E-mail Integration
The integration of e-mail delivery into unified messaging results in only one device required to obtain messages whether voice, fax or e-mail. EG, e-mail or text to speech so the system can read in an automated voice the e-mail over the phone.

The physical network that carries data traffic


Feature Phone
Also known as a system phone. A phone with additional features for that particular phone system. This type of phone cannot usually be swapped between different phone systems.

Feature Line
A BT service running over PSTN. It provides basic PBX functionality requiring one dedicated phone line per user, ideal for small businesses.

Fibre Optics
When light is transmitted over high purity, thin fibres of glass. This gives fibre optic cable a far superior bandwidth then conventional cable or copper wire.

Fibre To The Cabinet (FTTC)
This is a generic term for any broadband service that uses optic cable, instead of traditional copper wiring, to connect a telephone exchange to the ‘green cabinets’ on surrounding roads.


Hosted Telephony
An internet protocol based phone system which is hosted in a data centre externally, removing the need to have hardware in the office.

Hunt Group
Multiple phones grouped by a single extension number which enable a call to be answered by anyone in the hunt group. The calls will ‘hunt’ from one phone to another until answered.


Information and Communication Technology. This refers to computers, the internet, CD-ROMS and other software’s and hardware’s.

Integrated Services Digital Network. Gives better call quality, quicker connection times and DDI facilities.

Each circuit of ISDN2e contains two channels, commonly businesses will go to a maximum of 8 channels before upgrading to ISDN30e. It is mainly delivered by BT and is on copper wire.

A fully digital public network service providing up to 30 separate channels which can be used for voice, data, fax, video conferencing etc. Delivered by BT and cable companies on fibre optic cable.

IVR (Interactive Voice Response)
A voice processor which can answer calls and accesses a database to make a data enquiry. The database may be held in the voice system or within a third party system. Telephone banking and call centres are where this system is most often encountered.

IoT (Internet of Things)
The communication that occurs between objects and other internet-enabled devices that feature an IP address for connectivity.

IP Telephony 
IP telephony involves making voice calls that are carried over the internet protocol.


LAN (Local Area Network)
A data communications network linking PCs together, typically through a central file server, to provide a multi-node centrally controlled computer system. LANs are usually privately owned and found in one building or in a group of buildings in close proximity.

Leased Line
A service contract between a provider and a customer, this means the provider would deliver a symmetric telecommunications line connecting two or more locations in exchange for a monthly rental fee. Leased lines can be used for data, telephone or internet services.

Local loop unbundling (LLU)
This is the regulatory process of allowing multiple telecommunications operators to use connections from the telephone exchange’s central office to the customer’s premises. The physical wire connection between customer and company is known as a ‘local loop’, and it is owned by the incumbent local exchange carrier. To increase competition, other providers are granted unbundled access. Re-routes calls by using a ‘smart-box’ or a four digit code to an alternative provider.

LCR (Least cost routing)
Re-routes calls by using a ‘smart-box’ or a four digit code to an alternative provider.

Longest Waiting
A group where the phone system rings the free group members in order of how long they have been free. Useful where you want to share the workload fairly between staff.


NEC’s superb, user-friendly software, was especially developed for those companies who wish to manage their outgoing and incoming calls. MyCalls includes applications specifically designed to give vital ‘real-time information’ i.e. showing if staffing levels need to be adjusted to suit call traffic to avoid a high rate of missed or abandoned calls and the subsequent loss of business. MyCalls suite comprises MyCalls Call Manager, MyCalls Call Centre, MyCalls Desk Top, MyCalls Recorder and MyCalls Enterprise for multi-site and multi-system situations.

Multiprotocol Label Switching (MPLS)
A networking technology which is used to route data packets over an IP network. MPLS ensures that all packets in a particular flow take the same route over a backbone. It eliminates the need to buy and manage multiple firewalls as traffic is routed within a secure virtual private network.

M2M – Machine to Machine
A wireless technology that enables wired and wireless systems to communicate with each other without manual assistance.


NECi – NEC Infrontia
World leading developer and supplier of telecommunication systems and equipment – Dalys is in their top five UK resellers

NGN – Non Geographic Number
A number that is not geographically based, usually beginning 0800, 0844.

Number Porting
An agreement which allows telephone numbers to be moved between telecoms companies.


PBX/PABX Private (Automatic) Branch Exchange
Also known as a telephone system or switch.

The access points and means of connection of a voice processor. A port is typically an extension socket supporting one caller at any one time.

POT (Plain Ordinary Telephone)
Also known as a SLT (see below). Not a system, digital or feature phone. These are analogue phones and work off analogue cards in the phone system.

Presentation number
The option of ‘masking’ the outbound number of a telephone line with a different number. This feature is useful who do not want end users knowing their physical location or if they want to present a non-geographic number.

PSTN – Public Switched Telephone Network
The general telephone network available to all residential and business customers. Also sometimes used as a substitute for “analogue”.


QOS – Quality of Service
The ability to provide different priority to different applications, users, or data flows, to guarantee a certain level of performance. For example, when a QOS router detects an IP voice call coming in then it would slow down flow of all other data in order to increase the quality of the voice call as it switches it’s priority over automatically.


Ring Groups
The programming of a selection of phones to ring as a result of a particular incoming number or DDIs.


Screen Popping
The ability for your computer to pick up the incoming telephone call and relay the caller’s information to your screen before you answer the call.

SDSL – Symmetric Digital Subscriber Line
A similar service to ADSL with faster upload speeds. Available at selected exchanges in speeds of up to 2Mb.

A group where the system always rings the first free group member starting from the front of the group. Useful where you want the most senior members of the team to take the phone calls where possible.

SIP (Session Initiation Protocol)
This is a service offered by many telephony service providers that connects a company’s PBX to the existing telephone system infrastructure (PSTN) via Internet using the SIP VoIP standard.

Service Level Agreement – part of a service contract where the level of service is formally defined.

NEC Infrontia’s business telephone system giving superb functionality and scalability for smaller businesses and schools. Ideal upgrade from the XN120, with even more features and flexibility.

SLT Phone (Single Line Phone)
Also known at POT phone (see above). Not a system, digital or feature phone.

SNDDi (Single Number Direct Dial Inward)
This is a unique single number for use on ISDN2/30e it is most commonly used to enable devices such as fax machines, to route calls through digital lines without the need for a dedicated exchange line. Also see DDI

NEC business telephone system. Now end of life but still supported by Dalys – for more information

NEC Infrontia’s latest business telephone system delivering the ultimate in unified communications for business from SMEs, to multi-site enterprises, schools and colleges.Superseding the SV8100 there is the ability to upgrade but with interchangeable parts making an upgrade very cost effective.

Speed Dials
This is the storing of regularly dialled numbers under short codes.

Engineers often refer to phone systems as switches.


Telephone handsets are often referred to by engineers as terminals.

TPS (Telephone Preference Service)
A service that bars calls to residential or business numbers that have been registered. Used mostly to prevent unwanted sales or marketing calls.

Incoming lines from a public telephone operator.

Toll Fraud
The illegal (fraudulent) use of your telephone system by external or internal sources to make calls, usually abroad or to high tariff numbers


UCB Unified Communications for Business
UCB is the all-encompassing solution for single point contact, exclusively for the NEC SV8100 system, bringing together all communications methods in your business, internally and externally.

Unified Messaging
The control of multiple messaging mediums through one master control screen. Typically a Microsoft Windows based panel on a PC running off a LAN. The unified messaging may provide visual control of voice and fax messages which are delivered to the PC node through a connection of the voice processor to the LAN’s file server.


Very-high-bit-rate Digital Subscriber Line. Upload and download speeds can be faster and higher bandwidth may better performance, dependent on conditions and distance.

Voice Mail
The ability to receive information direct from a caller when you are unable to answer the telephone. Extremely versatile it allows you, as a basic feature, to provide callers with a personalised greeting and to give them the option of leaving a message. It is also possible to offer callers the opportunity to speak to an operator or a colleague.

VOIP – Voice Over Internet Protocol
see ‘Hosted Telephony’

Technologies designed to provide a layer of abstraction between computer hardware systems and the software running on them.

Virtual Private Networking (VPN)
Provides a secure connection between private networks linked through private networks or public networks such as the internet.


NEC’s business telephone system for SMEs. Now end of life but stills supported by Dalys. For more information click here

For remote support from our Service Engineers and for on-line demonstrations download Team Viewer here.

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