The document is a seminar report on Asynchronous Transfer Mode (ATM) that was presented by Sangram Sekhar Choudhuri. It discusses ATM as a high-performance, cell-oriented switching and multiplexing technology that utilizes fixed-length packets to efficiently carry different types of traffic, helping with multimedia and networking applications. The report covers an introduction to ATM, its benefits, components like the cell header format, reference model, and address format. It also discusses ATM service classes, technical parameters, standards, data insertion schemes, applications for voice, video and networking traffic management, and concludes that ATM provides a reliable, scalable transport system needed for future networks.

1. Technical Seminar
A
SEMINAR REPORT ON
ASYNCHRONOUS TRANSFER MODE(ATM)
Under the Guidance of
Mr R.K.Shial
By
Sangram Sekhar Choudhuri
CS200118218
Presented by :- Sangram Sekhar Choudhuri(CS200118218)1

2. Technical Seminar
INTRODUCTION
• High performance, cell-oriented switching and
multiplexing technology
• Utilizes fixed-length packets to carry different
types of traffic
• Helps in efficient multimedia applications,
high-speed LAN connections and used in
broad range of networking devices
Presented by :- Sangram Sekhar Choudhuri(CS200118218)2

3. Technical Seminar
OVERVIEW
Presented by :- Sangram Sekhar Choudhuri(CS200118218)3

4. Technical Seminar
BENEFITS OF ATM
• high performance via hardware switching
• dynamic bandwidth for bursty traffic
• class-of-service support for multimedia
• scalability in speed and network size
• common LAN/WAN architecture
• opportunities for simplification via VC
architecture
• international standards compliance
Presented by :- Sangram Sekhar Choudhuri(CS200118218)4

5. Technical Seminar
ATM CELL HEADER FORMAT
Presented by :- Sangram Sekhar Choudhuri(CS200118218)5

6. Technical Seminar
ATM REFERENCE MODEL
Presented by :- Sangram Sekhar Choudhuri(CS200118218)6

7. Technical Seminar
ATM ADDRESS FORMAT
Presented by :- Sangram Sekhar Choudhuri(CS200118218)7

8. Technical Seminar
ATM SERVICE CLASSES
• constant bit rate (CBR)
• variable bit rate–non-real time (VBR–NRT)
• variable bit rate–real time (VBR–RT)
• available bit rate (ABR)
• unspecified bit rate (UBR)
Presented by :- Sangram Sekhar Choudhuri(CS200118218)8

9. Technical Seminar
ATM TECHNICAL PARAMETERS
• cell loss ratio (CLR)
• cell transfer delay (CTD)
• cell delay variation (CDV)
• peak cell rate (PCR)
• burst tolerance (BT)
• sustained cell rate (SCR)
Presented by :- Sangram Sekhar Choudhuri(CS200118218)9

10. Technical Seminar
ATM STANDARDS
• A cohesive set of specifications that provide a
stable ATM framework.
• Provide the end-to-end service definitions
• An important ATM standard is interworking
between ATM and frame relay
• Two ATM networking standards
1)broadband intercarrier interface (B–ICI)
2)public network-to-network interface (P–NNI)
Presented by :- Sangram Sekhar Choudhuri(CS200118218)10

11. Technical Seminar
DATA INSERTION SCHEMES
• RFC1483-specifies how interrouter traffic is
encapsulated into ATM
• LANEMPOA- support dynamic use of ATM
SVCs
• voice and video adaptation schemes-for efficient
traffic that no natural breaks, such as a circuit
carrying bits at a fixed rate
Presented by :- Sangram Sekhar Choudhuri(CS200118218)11

12. Technical Seminar
ATM LAN EMULATION(LANE)
• LANE components
1)LANE clients
2)LANE servers
Presented by :- Sangram Sekhar Choudhuri(CS200118218)12

13. Technical Seminar
VIDEO OVER ATM
• Handled by VBR–RT VCs using AAL–5 for
MPEG2 on ATM for video-on-demand
applications
• MPEG2 coding can result in two modes:
1. program streams—variable-length packets
carrying single or multiple programs
2. transport streams—188-byte packets that
contain multiple programs
• Time stamps are inserted into MPEG2 packets
during the encoding and multiplexing process to
make better use of networking resources.
Presented by :- Sangram Sekhar Choudhuri(CS200118218)13

14. Technical Seminar
VOICE OVER ATM
• VBR–RT connections is used over ATM which
uses silence period.
• Various dynamic compression techniques are
used to free bandwidth and alleviate congestion
• A further enhancement is to support voice
switching over SVCs which interprets PBX
(private branch exchange) signaling and routing
voice calls to the appropriate destination PBX
Presented by :- Sangram Sekhar Choudhuri(CS200118218)14

15. Technical Seminar
NETWORK TRAFFIC MANAGEMENT
• objectives :To deliver quality-of-service (QoS)
for multimedia applications and provide overall
optimization of network resources.
• categorized into three distinct elements
1. nodal-level controls that operate in real time
2. network-level controls operate in near real time
3. network engineering capabilities operating in
non real time
Presented by :- Sangram Sekhar Choudhuri(CS200118218)15

16. Technical Seminar
ATM APPLICATIONS
Presented by :- Sangram Sekhar Choudhuri(CS200118218)16

17. Technical Seminar
ATM AND IP INTERWORKING
• ATM and IP offer: Scalability, traffic engineering,
service differentiation, high availability, value-added
applications such as Virtual Private
Networks (VPNs)
• Some specifications of ATM and IP
1. Multi-Protocol over ATM (MPOA) as addition to
LAN Emulation (LANE)
2. Additions to ATM's superior routing protocol
PNNI
3. adoption of Frame-based ATM over Sonet/SDH
(FAST)
Presented by :- Sangram Sekhar Choudhuri(CS200118218)17

18. Technical Seminar
CONCLUSION
• ATM technology is the only technology that can
guarantee a certain and predefined quality of
service.
• The growth of the Internet, need for broadband
access and e-commerce are spurring the need
for a reliable, flexible, scalable, predictable,
versatile transport system and that is given by
ATM Technology.
• For voice, video, data and images together, the
next generation network depends on ATM.
Presented by :- Sangram Sekhar Choudhuri(CS200118218)18

19. Technical Seminar
Presented by :- Sangram Sekhar Choudhuri(CS200118218)19