Sunday, November 20, 2011

Technical Glossary

ADSL :
                     Asymmetric Digital Subscriber Line. A digital technology that allows the use of a copper line to support high bandwidths in one direction and a lesser bandwidth in the other.

ATM :
                   Asynchronous Transfer Mode, a standard for cell- based high speed data communications.

Bottleneck :
                   The part of a network where the economics of building alternative networks are such that effective competition is unlikely to emerge.

Broadband :
                   A data connection defined as ‘always-on’, and capable of providing a download speed of a minimum of 256kbit/s.

Bundling :
                  Linking the purchase of one product or service to another, either by selling as a package, or through the use of discounts for joint purchasing.

Core network :
                 The centralised part of a network, characterised by a high level of traffic aggregation, high capacity links and a relatively small number of nodes.

CLI :       Caller Line Identification

COS :
                Class of Service e.g. Committed Access Rate (CAR), Waited Random Early Detection (WRED), Waited Fair Queuing (WFQ) in context of MPLS

DEL :       Direct Exchange Line

DSL :       Digital Subscriber Line.

E.164 :
                 E.164 is an ITU-T recommendation which defines the international public telecommunication numbering plan used in the PSTN and some other data networks. It also defines the format of telephone numbers.

ENUM
                 Electronic Numbering. A suite of protocols to unify the telephone system with the Internet by using E.164 addresses with DNS and IP addressing system.

ERNET :    Education and Research Network

Ex ante :     Before an event takes place.

Ex post :     After an event takes place.

FCC  :
                Federal Communications Commission. The US regulatory body that regulates all inter-state and foreign communications by wire, radio and television. Intrastate communications are regulated by state public utilities commissions.


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