ISDN (Integrated Services Digital Network)

= ISDN (Red Digital de Servicios Integrados)
Ex: This article proposes that Integrated Services Digital Networks (ISDNs) can be used to educate groups of people by means of dialogue featuring an interactive exchange of textual, voice, graphic, and pictorial information.

a network/telephone connection that transfers data at rates more than 4 times faster than a 28.8Kbps modem. Ordinary modems (non-ISDN) convert computer data to audio tones/analog to transfer over the phone lines. ISDN "modems" connect digitally : Inherently faster digital signals rather than tone signals transfer over the lines. Network transfer speed comparison 
Basic Rate ISDN, often called "2B+D" or BRI, arrives on 3 channels - one Delta ("D") 16 Kbps channel carrying telephone signals and two "Bearer" ("B") channels delivering data at 64 Kbps. Primary Rate ISDN, also known as T1 service, has 23 B channels and one D channel, delivering at a rate of 1.544 Mbps (T3 transmits at an extremely high rate - 44.7 Mbps).

A type of connection for digitally transmitting information (data, images, sound etc).

Durch die Digitalisierung von Sprache - statt einer Umwandlung in analoge Signale - wird die Datenübertragung schneller. Zusätzliche Funktionen sind die Anzeige der Rufnummer des Anrufers, Rufumleitung und Kanalbündelung.