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VoIP Onno W. Purbo Arah Perkembangan.

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Presentation on theme: "VoIP Onno W. Purbo Arah Perkembangan."— Presentation transcript:

1 VoIP Onno W. Purbo

2 Arah Perkembangan

3 Philosophy The old world Box reliability Centralized The new world Network availability Distributed

4 References

5 Outline End User Perspective Conceptual Framework Next Generation Telco..

6 End User - Internet Telephone

7 Komponen VoIP / Menit TelkomRp. 75 / menit ISPRp. 75 / menit Hook-off Service Delay <250ms

8 Biaya SLI / Menit (1US$=Rp8000) CountryPeakNormalDiscVoIP US9900830062301350 Singapore6780565042402550 Taiwan9960830062704070 Jepang11286940070502310 Hong Kong9960830062302710

9 Solusi Kantor Kecil / Rumah Satu (1) Saluran VoIP Internet PhoneJACKUS$150 Internet LineJACKUS$220 Internet PhoneCARDUS$170

10 Komunitas WARNET Free subscribe: Komunitas e-commerce

11 Kebutuhan WARNET Line telepon koin Leased line analog Regional Network / DIVNET Akses ke box JAMUS V.35 / RS.449

12 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

13 Teknologi VoIP sederhana

14 Internet Telephone

15 Dialer

16 Video Conference

17 Internet PhoneJACK

18 Connection PhoneJACK

19 Internet PhoneCARD

20 Voice Quality Comparison

21 Solusi Gateway Sederhana

22 VoiceTronix (8 port)

23 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

24 Issue Desktop VoIP Solution Ease of Installation. Infrastructure. Flexibility. Compatibility. Ease-of-Use. Quality. Cost Growth Path. Base for Applications.

25 Aplikasi Desktop VoIP IntraNet Communication Remote Call Forwarding Distributed Call Center Virtual PBX Line Doubling Personal Iphone Calling


27 Intranet Communications

28 Remote Call Forwarding

29 Distributed Call Center

30 Virtual PBX

31 Line Doubling

32 Mobile User

33 Internet Locator Service (ILS) Mapping Name Number  Dynamic IP

34 Internet Locator Service (ILS) ILS & chat system Dial your DNS name.

35 Conceptual Framework H.323

36 H.323 Benefit Codec Standards. Interoperability. Network Independence. Platform & Application Independence. Multipoint Support. Bandwidth Management. Multicast Support. Flexibility. Inter-Network Conferencing.

37 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.

38 Open Standard


40 Komponen H.323 Terminal Gateway Gatekeeper Multipoint Control Unit (MCU)

41 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.


43 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)

44 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.

45 H.323/PSTN Gateway

46 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.

47 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.

48 Gatekeeper Zone

49 Isu Quality of Service (QoS) Kekurangan Bandwidth Delay terlalu lama. Jitter / Variasi delay.

50 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.

51 Metoda Kompresi KompresiKbpsMIPSmsMOS G.711PCM 640.340.1254.1 G.726 ADPCM 32140.1253.85 G.728 LD-CELP 16330.6253.61 G.729 CS-ACELP 820103.92 G.729 x2 Encoding 820103.27 G.729 x3 Encoding 820102.68 G.729a CS-ACELP 810.5103.7 G.723.1 MPMLQ 6.316303.9 G.723.1 ACELP 5.316303.65

52 MOS vs. DSP Price

53 Intermediate Solution VoIP

54 Interkoneksi Suara-Data-Suara

55 Interkoneksi PC-Telepon

56 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

57 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.

58 Next Generation Telco

59 Split Data & Voice Network

60 Converged Enterprise Network


62 Philosophy The old world Box reliability The new world Network availability

63 Network Availability

64 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).

65 Campus Network


67 How? – Detailed..

68 End-to-End Architecture

69 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)


71 Low Cost of Ownership


73 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.


75 WAN QoS-Enabling Tech.


77 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

78 Prioritizing Voice Traffic Priority Queuing (PQ) Data Traffic weighted fair queuing (WFQ) class-based weighted fair queuing (CBWFQ)

79 Prioritizing

80 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).

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


83 Issue QoS - Campus Network Aggregation points where many links aggregate into an uplink. aggregation points where speed mismatches occur.


85 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.

86 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.

87 Application IP Telephony Unified Messaging IP Contact Center

88 VoIP

89 Unified Messaging


91 IP Contact Center



94 Migration Strategies



97 Terima Kasih


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