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VoIP. Onno W. Purbo [email protected] Arah Perkembangan. Philosophy. The old world Box reliability Centralized The new world Network availability Distributed. References. http://www.cisco.com http://www.lucent.com http://www.xl.com http://www.quicknet.net http://openh323.org

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VoIP

Onno W. Purbo

[email protected]



Philosophy
Philosophy

  • The old world

    • Box reliability

    • Centralized

  • The new world

    • Network availability

    • Distributed


References
References

  • http://www.cisco.com

  • http://www.lucent.com

  • http://www.xl.com

  • http://www.quicknet.net

  • http://openh323.org

  • http://openphone.org

  • http://www.pulver.com


Outline
Outline

  • End User Perspective

  • Conceptual Framework

  • Next Generation Telco ..



Komponen voip menit
Komponen VoIP / Menit

  • Telkom Rp. 75 / menit

  • ISP Rp. 75 / menit

  • Hook-off Service

    • http://www.net2phone.com

  • Delay <250ms



Solusi kantor kecil rumah
Solusi Kantor Kecil / Rumah

  • Satu (1) Saluran VoIP

  • Internet PhoneJACK US$150

  • Internet LineJACK US$220

  • Internet PhoneCARD US$170


Komunitas warnet
Komunitas WARNET

  • [email protected]

  • Free subscribe:

    • [email protected]

  • Komunitas e-commerce

    • [email protected]

    • [email protected]

    • [email protected]


Kebutuhan warnet
Kebutuhan WARNET

  • Line telepon koin

  • Leased line analog

    Regional Network / DIVNET

  • Akses ke box JAMUS V.35 / RS.449


Warnet tanpa telkom
WARNET “tanpa” Telkom

WARNET ke Internet

  • Satellite DirectPC – US$200 / card

  • KabelVision – Rp. 300.000 / bulan

    Jaringan WARNET

  • 2-11 Mbps 2.4 GHz US$250 / card












Voip untuk warnet
VoIP untuk WARNET

  • Investasi WARNET+

  • Invest Card DSP ~US$150 / kanal.

  • Estimasi ke US biaya / menit

    • US$0.13 + Rp. 75 + Rp. 75

  • Estimasi ke US biaya SLI 001

    • Rp. 9900-8300 / menit


Issue desktop voip solution
Issue Desktop VoIP Solution

  • Ease of Installation.

  • Infrastructure.

  • Flexibility.

  • Compatibility.

  • Ease-of-Use.

  • Quality.

  • Cost

  • Growth Path.

  • Base for Applications.


Aplikasi desktop voip
Aplikasi Desktop VoIP

  • IntraNet Communication

  • Remote Call Forwarding

  • Distributed Call Center

  • Virtual PBX

  • Line Doubling

  • Personal Iphone Calling









Mobile user1
Mobile User

  • Internet Locator Service (ILS)

  • Mapping Name Number  Dynamic IP


Internet locator service ils
Internet Locator Service (ILS)

  • http://www.icq.com

    • ILS & chat system

  • http://www.tzo.com

    • Dial your DNS name.



H 323 benefit
H.323 Benefit

  • Codec Standards.

  • Interoperability.

  • Network Independence.

  • Platform & Application Independence.

  • Multipoint Support.

  • Bandwidth Management.

  • Multicast Support.

  • Flexibility.

  • Inter-Network Conferencing.


H 323 mengatur
H.323 mengatur ..

  • Video Codec (H.261 dll).

  • Audio Codec (G.711, G.723 dll).

  • Data channel (T.120 dll) e-board dll.

  • System Ctrl Unit (H.245, H.225.0 dll).

  • H.225.0 layer – error detection, error correction and frame sequencing.



Komponen h 323
Komponen H.323

  • Terminal

  • Gateway

  • Gatekeeper

  • Multipoint Control Unit (MCU)


Terminal h 323
Terminal H.323

  • Provide Real-Time.

  • Provide Two-way communications.

  • H.245 – nego channel usage & capabilities.

  • Q.931 – Registration/Admission/Status (RAS).

  • T.120 – Data Conferencing Protocols.


Komponen h 3231
Komponen H.323

  • H.323 Gateway

    • Interface H.323 terminal – WAN terminal.

  • H.323 Gatekeeper

    • Address Translation (E.164 – IP)

    • Admission Control. Authentication.

    • Bandwidth Control.

    • Zone Management.

    • Call Control & Management

      • (e.g. VoIP – PSTN)


H 323 gateway
H.323 Gateway

  • Optional!

  • Translation function between H.323 conferencing endpoints and other terminal types.

  • Translation between transmission formats (i.e. H.225.0 to H.221).

  • Translation between communications procedures (i.e. H.245 to H.242).

  • Translation between audio and video codecs.

  • Performs call setup and clearing on both the LAN side and the PSTN side.



Gatekeeper
Gatekeeper

  • The most important component asct as a virtual switch of an H.323 enabled network.

  • It acts as the central point for all calls within its zone and provides call control services to registered endpoints.


Gatekeeper1
Gatekeeper

  • Address translation from LAN aliases for terminals and gateways to IP or IPX addresses (e.g E.164 – IP)

  • Bandwidth management.

  • Route H.323 calls.

  • Bill for calls.



Isu quality of service qos
Isu Quality of Service (QoS)

  • Kekurangan Bandwidth

  • Delay terlalu lama.

  • Jitter / Variasi delay.


QoS

  • Resource Reservation Protocol (RSVP)

  • Real Time Protocol (RTP)

  • Compressed Real Time Protocol (CRTP)

    • Traffic Shaping

    • Queuing: Custom Queuing, Weighted Fair Queuing.

    • Congestion Control: Random Early Detection.

    • Effisiensi Jaringan: link fragmentation & interleaving.







Gatekeeper2
Gatekeeper

  • Lucent PacketStar IP Gatekeeper

    • 23.500 DSO

    • 2.300.000 calls / day (one zone)

    • 7.800.000 calls / day (multi zone)

  • Cisco CallManager

    • Windows NT

  • Quicknet

    • H.323 Internet SwitchBoard


Gateway
Gateway

  • Lucent PathStar

    • 80.000 POTS

    • 10.000 xDSL

  • Cisco DE-30+

    • 30 voice on E1

  • Cisco AT-2, 4, 8

    • Analog loop RJ-11, 2, 4, 8 POTS.





Philosophy1
Philosophy

  • The old world

    • Box reliability

  • The new world

    • Network availability



Network availability1
Network Availability

  • Redudancy at many levels.

  • Advanced Layer 3 Protocols:

    • Hot Standby Routing Protocol (HSRP).

    • Open Shortest Path First (OSPF).

    • Enhanced Interior Gateway Routing Protocol (EIGRP).

  • Multicast Routing:

    • Protocol Independent Multicast (PIM).

    • Distance Vector Multicast Routing Protocol (DVMRP).





Open architecture
Open Architecture

  • H.323

  • Simple Gateway Control Protocol (SGCP)

  • Media Gateway Control Protocol (MGCP)

  • Session Initiation Protocol (SIP)

  • Telephony Application Programmable Interface (TAPI)

  • Java Telephony Application Programmable Interface (JTAPI)



Hierarchical wan design
Hierarchical WAN Design

  • the network must support and supply the prerequisite QoS features.

  • Hierarchical model to allow the most cost-effective platforms.

  • As the requirements for data traffic outstrip those of voice, voice bandwidth decreases & lowering costs.

  • WAN links to support the minimum requirements for data + voice and video. When other applications are quiescent, the bandwidth is available for data.



Classification
Classification

  • Layer 3 (IP)

    • IP Precedence; VoIP  5.

    • Differentiated Services Code Point (DSCP)

  • Layer 2 (MAC) schemes

    • Voice  RTP

    • Voice  UDP

    • Voice  Port 16383 - 32767


Prioritizing
Prioritizing

  • Voice Traffic

    • Priority Queuing (PQ)

  • Data Traffic

    • weighted fair queuing (WFQ)

    • class-based weighted fair queuing (CBWFQ)



Link efficiency techniques
Link-Efficiency Techniques

  • Voice Compression (e.g. G.723).

  • Compressed RTP

    • 40 byte IP+UDP+RTP  2-4 bytes.

  • Voice Activity Detection (VAD).

  • Link Fragmentation & Interleaving.

    • Frame Relay – FRF.12

    • Serial Link – Multilink PPP (MLP).


Traffic shaping
Traffic Shaping

  • Multiple access nonbroadcast media such as ATM and Frame Relay where the physical access speed varies between two end points.


Issue qos campus network
Issue QoS - Campus Network

  • Aggregation points where many links aggregate into an uplink.

  • aggregation points where speed mismatches occur.


Qos campus network
QoS Campus Network

  • The primary concern is buffer management and the ability to provide the required queuing schemes to ensure voice gets the appropriate bounds for loss, delay, and jitter.


Qos strategies
QoS – Strategies

  • Classification is a key attribute.

  • Queuing techniques.

  • Buffer management is also used to ensure that excess jitter is not added for voice traffic.

  • To combat this, the multilayer LAN switches provide either two queues or a single queue with definable drop thresholds to bound delay.


Application
Application

  • IP Telephony

  • Unified Messaging

  • IP Contact Center







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