1. Jntuk,vizianagaramdelhip,94413062721 B-ISDN and ATM

2. Jntuk,vizianagaramdelhip.,94413062722 Characteristics of ATM Uses small, fixed-sized cell Connection oriented Bandwidth allocation on demand Supports multiple service types Applicable to LAN and WAN

3. Jntuk,vizianagaramdelhip.,94413062723 ATM Signaling UNI : User to Network Interface NNI : Network to Network Interface Different protocol in the different domain

4. Jntuk,vizianagaramdelhip.,94413062724 Virtual Path / Virtual Channel Connection Identifier : VPI/VCI Physical Link : Contains multiple VPs Virtual Path : Contains multiple VCs Virtual Channel : Logical path between ATM endpoint

5. Jntuk,vizianagaramdelhip.,94413062725 VP and VC Switching

6. Jntuk,vizianagaramdelhip.,94413062726 ATM Cell Header PTI Payload Type Identifier(3 Bits) - 1 bit : User/Control Data. - 2 bit : Congestion flag. - 3 bit : Last Cell flag CLP Cell Loss Priority Bit HEC Header Error Check(8 Bits)

7. Jntuk,vizianagaramdelhip.,94413062727 Permanent Virtual Circuit Manual updates of VPI/VCI tables in network equipment

8. Jntuk,vizianagaramdelhip.,94413062728 Switched Virtual Curcuit Setup connection using UNI/NNI signaling

9. Jntuk,vizianagaramdelhip.,94413062729 ATM Reference Model Signaling ATM Adaptation Layer Q.2931, Q2971 SAAL ATM PHY SAAL

10. Jntuk,vizianagaramdelhip.,944130627210 ATM Service Criteria Traffic parameters –Peak Cell Rate(PCR), Sustainable Cell Rate(SCR) –Maximum Burst Size(MBS), Minimum Cell Rate(MCR) Quality of Service –Maximum Cell Transfer Delay(MCTD) –Cell Delay Variation Tolerance(CDVT) –Cell Loss Ratio(CLR)

11. Jntuk,vizianagaramdelhip.,944130627211 ATM Service Categories

12. Jntuk,vizianagaramdelhip.,944130627212 Traffic Management - I CAC(Connection Admission Control) Determine whether a connection can be progressed or not - satisfy the traffic contract of the connection - not disturb traffic contracts of the other connections

13. Jntuk,vizianagaramdelhip.,944130627213 Traffic Management - II UPC(Usage Parameter Control) Protect network resources from malicious as well as unintentional misbehavior - based on traffic contract of the connection - action : cell discard, cell tagging

14. Jntuk,vizianagaramdelhip.,944130627214 Traffic Management - III CLP(Cell Loss Priority) Control In Congestion state - EFCI(Explicit Forward Congestion Control) - CLP(Cell Loss Priority)

15. Jntuk,vizianagaramdelhip.,944130627215 Traffic Management – IV CAC / Connection Management UPC (Policing) CLP / EFCI control Frame Discard Traffic Shaping ABR Congestion Feedback

16. Jntuk,vizianagaramdelhip.,944130627216 ATM Signaling Protocol Point-to-Point ATM Connection(Q.2931)

17. Jntuk,vizianagaramdelhip.,944130627217 Reserved VPI/VCI Q.2931 Q.2971

18. Jntuk,vizianagaramdelhip.,944130627218 Message Structure Information ElementLength Protocol discriminatorDistinguish Message1 Call referenceIdentify call at the local UNI4 Message typeIdentify the function of message2 AAL parameter4-21 ATM traffic descriptor12-20 Broadband bearer capability 6-7 QoS parameter6 ………