Glossary

Glossary. Definitions of some telecoms jargon.


Auto Attendant

An automated answering system that puts the caller through to the correct short dial/extension or department in the company by keys on a handset e.g. Press 1 for Sales.

Bandwidth

Bandwidth is a measurement that gives an indication of the amount of data that can be transferred through a connection in certain amount of time. In either bps (bits per second) or bytes per second.

Call Divert

A feature that allows users to use another number to re-direct their calls to eg. another extension, group, voicemail or external number.

Call Forwarding

A feature that enables incoming calls to be forwarded to a different number, eg another extension, group, voicemail or external number.

Channel

This is another word for telephone line used in reference to digital lines.

Cloud Telephony

Cloud or Hosted telephony is a system that resides in the cloud rather than physically in the form of a PBX in your office.

DDI

This stands for Direct dial in. When calls are made to a particular numbers they will directly dial to an individual’s extension/one number. This enables them to be called directly or automatically through a switchboard without needed a receptionist.

DND

Or in other words Do not disturb. You can set your phone to DND if you don’t want to be contacted for example if you are in a meeting.

DNS

Domain Name Service converts domain names to a IP address which a computer can ask to be routed by a network.

Ethernet

A collection of frame-based computer networking technologies for local area networks.

Gateway

A piece of equipment that converts voice, video or fax in real-time to and from the PSTN to an IP network.

Hosted

In terms of telephony this phrase is used to describe a service that is provided to the customer using equipment that is located remotely from their facility or in the ‘cloud’.

Hunt Groups

This allows a group of extensions or one numbers to be grouped together for example to be part of a department in a company for example support and calls will ring round them until it is answered.

IP – Internet Protocol

A term used to describe IP signalling methods and the way that voice traffic and data signals can be sent between devices connected to a network, internet and LANs.

ISDN

Also known as an Integrated Services Digital Network. ISDN is a digital public network for voice and data communications.

LAN

A computer network within a limited area such as a building or office space.

IVR

Interactive Voice Recognition see auto attendant.

Internet Service Provider

An organization that provides access to the Internet.

PBX

A Private Branch Exchange is a private business telephone system.

Protocol

Procedures in regard to the transmission of data between two devices.

PoE

Power over Ethernet allows electrical power to be transmitted through ethernet cables.

PSTN

A Public Switched Telephone Network was traditionally analogue but now includes digital (ISDN).

QoS

Provides adequate voice quality across IP networks.

Router

A network device that that handles message transfer between devices.


SIP

Session Initiation Protocol

SIP Trunking

A SIP trunk is a pure IP connection between your premises and the national telephone network.

Smartphone

A mobile phone that can browse the internet, receive email etc.

Trunk

A trunk is a ‘line’ or ‘channel’ that you need for making a call.


VPN

A Virtual Private Network is a fast and secure way to transfer data between remote sites.

VoIP

Voice over Internet Protocol is voice traffic passing over a WAN, VPN or the internet.

WAN

A large area computer network that isn’t just limited to one area.

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