Asynchronous Transfer Mode (ATM) Broadband ISDN (B-ISDN)

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<strong>ATM</strong> virtual circuits• Each cell carries virtual circuit identifier in it’s header(VPI+VCI)• some VPI/VCIs s reserved for signalling and management• Permanent and switched virtual circuits (PVC,(SVC)• PVC: manual setup, no network resiliency• SVC: signalling protocol needed• Virtual circuits are QoS-enabled• separate QoS contract can be appointed in each direction• Point-to-point (unidirectional/bidirectional(unidirectional/bidirectional) VCs• Point-to-multipoint (unidirectional(unidirectional) VCs© 2005 Petr Grygarek, Advanced Computer Networks Technologies6
VPI and VCI• VPI+VCI together identify virtual circuit• virtual path• identified by virtual path identifier (VPI)• bundle of virtual channels, all of them can beswitched transparently across the <strong>ATM</strong> network as abundle (based on the common VPI)• virtual channel• identified by the combination of a VPI and VCI© 2005 Petr Grygarek, Advanced Computer Networks Technologies7
Page 1 and 2: Asynchronous Transfer Mode(ATM)Broa
Page 3 and 4: Statistical multiplexing principlec
Page 5: ATM Endpoints• (Workstations)•
Page 10 and 11: ATM layers and reference model© 20
Page 12 and 13: ATM Reference model planes• Contr
Page 14 and 15: ATM layer• Switches cells accordi
Page 16 and 17: ATM QoS© 2005 Petr Grygarek, Advan
Page 18 and 19: Examples of ATM VC QoS parameters
Page 20 and 21: Signalling and SVC EstablishmentReq
Page 22 and 23: Connection request routing protocol
Page 24 and 25: Usage of ATM for Data Transfers© 2
Page 26 and 27: LAN Emulation• Gives to stations
Page 28 and 29: LAN Emulation Client (LEC)• entit
Page 30 and 31: Broadcast and Unknown Server(BUS)
Page 32 and 33: Classical IP over ATM(CLIP)© 2005
Page 34 and 35: ATM position today• Telco company

Asynchronous Transfer Mode (ATM) Broadband ISDN (B-ISDN)

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