Integrated Services Digital Network (ISDN)

GPTKB entity

Predicate	Object
gptkbp:instanceOf	gptkb:International_Standard
gptkbp:abbreviation	gptkb:ISDN
gptkbp:BRIChannels	2 B channels and 1 D channel
gptkbp:category	Telecommunications Digital communication Networking standards
gptkbp:developedBy	gptkb:International_Telecommunication_Union
https://www.w3.org/2000/01/rdf-schema#label	Integrated Services Digital Network (ISDN)
gptkbp:interface	gptkb:Basic_Rate_Interface_(BRI) gptkb:Primary_Rate_Interface_(PRI)
gptkbp:introduced	1980s
gptkbp:PRIChannels	23 B channels and 1 D channel (North America) 30 B channels and 1 D channel (Europe)
gptkbp:protocolFamily	gptkb:Q.931 Q.921
gptkbp:purpose	digital transmission of voice and data
gptkbp:replacedBy	broadband internet DSL analog telephone system
gptkbp:standardizedBy	gptkb:ITU-T
gptkbp:supports	gptkb:DVD voice data
gptkbp:usedFor	video conferencing internet access voice calls fax transmission
gptkbp:uses	circuit-switched connections packet-switched connections
gptkbp:bfsParent	gptkb:Integrated_Services_LAN_(ISLAN)
gptkbp:bfsLayer	5