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Glossary

Definitions for difficult telephony terminology
21CN
  • 21st Century Network - A network transformation project of the BT Group. It will see the UK incumbent's telephone network move from the present Public Switched Telephone Network (PSTN) to an Internet Protocol (IP) system. As well as switching over the PSTN, BT has revealed plans to deliver many additional services over their new network, such as on-demand interactive TV services.
A
  • Asynchronous Transfer Mode - a network protocol designed to be a single networking strategy that can transport real-time video conference and audio as well as image files, text and email.
B
C
  • Colocation - The provision of space, bandwidth, and power in a data center, for use in web-hosting. The customer purchases and manages the the computing hardware.
  • Customer-Premises Equipment - Any equipment leased by a service provider, located at a subscribers premises and connected to the carrier's communication channel. For example, a Cisco DSL Modem is CPE.
D
  • Direct Dial-In - A feature offered by telephone companies that allows routing from a range of external (public) numbers to internal numbers, negating the need for operator involvement.
  • Digital Subscriber Line - A family of technologies that provides digital data transmission over the wires of a local telephone network
E
  • Ethernet - A family of frame-based computer networking technologies for local area networks.
  • Ethernet in the First Mile - A collection of protocols, defining the Ethernet in the access networks.
  • Ethernet Ring Protection - Also known as Ethernet Ring Protection Switching, is a method to provide protection for ethernet traffic in a ring topology and at the same time ensuring that there are no loops formed at the ethernet layer.
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I
  • Integrated Services Digital Network - A circuit-switched telephone network system, that also provides access to packet switched networks, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in better voice quality than an analog phone.

 

  • ISP - Internet Service Provider. 

    An Internet service provider(ISP) is an organization that provides access to the Internet.

 
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L
M
  • Managed Web Hosting - Colocated web-hosting where we assist and manage the maintenance of your hardware.
  • Multiprotocol Label Switching - A mechanism in high-performance telecommunications networks which directs and carries data from one network node to the next.
N
O
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R
S
  • Session Announcement Protocol - A protocol for broadcasting multicast session information
  • Session Initiation Protocol - A signalling protocol for controlling multimedia communication sessions such as voice and video calls over Internet Protocol (IP)
  • Service Level Agreement - Part of a service contract where the level of service is formally defined.
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V
  • Virtualised Hosting - Web hosting on a 'Virtual Machine': that is to say that one server might be running several instances of an operating system, each one performing the task of being a web host.
  • Virtual Local Area Network - a network where all participants communicate as if they were attached to the same domain, regardless of their physical location.
  • Virtual Private LAN Service - A way to provide Ethernet based multipoint to multipoint communication over IP/MPLS networks. It allows geographically dispersed sites to share an Ethernet broadcast domain by connecting sites through pseudo-wires.
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