ISDN - Iowa State University

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How ISDN Works! Review some concepts about digital transmission." Frequency Division MultiplexingIt is a scheme in which numerous signals are combined fortransmission on a single communications line or channel. Eachsignal is assigned a different frequency within the main channel." Time Division MultiplexingIt also is a scheme in which numerous signals are combined fortransmission on a single communications line or channel. Each signalis broken up into many segments,each having very short duration.! As digital networks and digital switching become morecommon, digital systems will be used extensively for highcapacity intercity interconnection of digital trafficDecember 7, 2000 Iowa State University 10
ISDN Logical Channels! In ISDN and other digital TDM environments, achannel generally refers to a time slot ontransmission facility and is full duplex.! ISDN defines two types of logical channnels" B (bearer) channel" D (data) channelDecember 7, 2000 Iowa State University 11
Page 2 and 3: What is ISDN! IntegratedServicesDig
Page 4 and 5: N-ISDN and B-ISDNB! Two kinds of IS
Page 6 and 7: Why We Select ISDN (cont…)! More
Page 8 and 9: How to Distinguish ISDN fromTraditi
Page 12 and 13: B - Channel! Transmit at 64 kbps an
Page 14 and 15: Other Channel- H Channel! A user ap
Page 16 and 17: BRI and PRI User/NetworkInterfaceDe
Page 18 and 19: Physical Connection to ISDNDecember
Page 20 and 21: Layer 2 Q.921! Describes the proced
Page 22 and 23: Relationship of Layer 1,2,3! The IS
Page 24 and 25: Establishing the Link Layer! These
Page 26 and 27: ISDN Services and Applications! Bea
Page 28 and 29: Interconnecting LANs and ISDN! ISDN
Page 30 and 31: Remote node-toto-LAN andterminal-to
Page 32 and 33: ISDN Services deliver! Telco servic
Page 34 and 35: The Conclusion of ISDN! With ISDN y
Page 36: Questions?

ISDN - Iowa State University

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