Jargon buster

see Disaster Recovery

see Digital Subscriber Line

see Digital Subscriber Line Access Multiplexer

see Digital Signal Processing

see Direct Station Selector

see Dual-Tone Multi-Frequency

A signalling protocol using the voice frequency band over a telephone line which allows numbers to be selected on a handset/mobile dial pad to initiate a further call route. Most telephone systems use this protocol to control their “Options” menu.

Ducts are the pipes underground holding copper and fibre lines.

see Dense Wavelength Division Multiplexing

A method of Wide Area Network transmission that uses a router to select the most appropriate path for each section of data packet transmission along a network. 

E-Side (short for Exchange Side) is the segment of cabling between the Primary Connection Point (PCP – usually a street cabinet) and the origin (exchange).

An Early Life Fault (ELF) is when a new product is found to be faulty shortly after purchase, without misuse or damage caused by the user.