An ISDN line consisting of two 64 kbit/s "bearer" channels and one 16 kbit/s "Delta" channel . The bearer channels are used for voice or user data, and the Delta channel is used for any combination of data, control/signalling and X.25 packet networking.
A service where a telephone subscriber has their telephone line provided by one company, can choose to have calls automatically routed across a different telephone company's network without needing to enter a special code or equipment.
Where IP telephony traffic is carried across dedicated a carrier telephony network in native IP. It eliminates the need for IP telephony users to convert to or from traditional digital or analogue technology.
This is a piece of equipment that marks the end of your provider's network. There are a variety of demarcation devices available, some of which provide features which help management of the service being provided.
Digital subscriber line. DSL is used to provide broadband services and can be delivered as an asymmetric (ADSL) service, where upload speed is lower than download speed. Symmetric services (SDSL) have the same upload and download speeds.
Where Voice Over IP is employed to transmit telephony over an internal business network. Calls to external parties need to be routed over a carrier network, either in native VoIP (where available) or af.
A system designed to prevent unauthorized access to or from a private network. Firewalls are frequently used to prevent unauthorized Internet users from accessing private networks connected to the Internet.
A Colt Intelligent Networking service that allows a customer to set up geographic numbers which route to a main number that is in a different location, e.g.. A local phone number in Paris that routes to a call centre located in Britain.
Internet Protocol. The technology upon which the Internet operates. IP specifies the format of packets, also called datagrams, and the addressing scheme. IP is frequently also used in non Internet networking.
Abbreviation of Integrated Services Digital Network, an international communications standard for sending voice, video, and data over digital telephone lines or normal telephone wires. ISDN supports data transfer rates of 64 Kbps.
Interactive Voice Response (IVR) product, interactive technology that allows customers to access a company’s database via a telephone touchtone keypad or by speech recognition, after which they can service their own enquiries by following the instructions.
A computer and software used to centrally manage email (and usually collaboration and other messaging applications), accessed via a mail client or web browser for web mail e.g. Microsoft Exchange Server.
A relationship between two or more Internet Service Providers in which they create a direct link between each other and agree to forward each other's traffic directly across this link instead of using the standard Internet backbone.
A network which is not visible to others who are not included in the network. Private networks can be established across the Internet, however private networks provided by communications providers offer much greater security, reliability and performance.
to create a virtual version of a device or resource, such as a server, storage device or an operating system where the framework divides the resource into one or more separate environments. Often used to refer to server virtualisation.
(wavelength-division multiplexing - WDM) is a technology which multiplexes multiple optical carrier signals on a single optical fibre by using different wavelengths (colours) of laser light to carry different signals.
Wavelength-Division Multiplexing. A technology which multiplexes multiple optical carrier signals on a single optical fibre by using different wavelengths (colours) of laser light to carry different signals.