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Onno W. Purbo VoIP Onno W. Purbo

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

1 Onno W. Purbo
VoIP Onno W. Purbo

2 Arah Perkembangan

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

4 References

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

6 End User - Internet Telephone

7 Komponen VoIP / Menit Telkom Rp. 75 / menit ISP Rp. 75 / menit
Hook-off Service Delay <250ms

8 Biaya SLI / Menit (1US$=Rp8000)
Country Peak Normal Disc VoIP US 9900 8300 6230 1350 Singapore 6780 5650 4240 2550 Taiwan 9960 6270 4070 Jepang 11286 9400 7050 2310 Hong Kong 2710

9 Solusi Kantor Kecil / Rumah
Satu (1) Saluran VoIP Internet PhoneJACK US$150 Internet LineJACK US$220 Internet PhoneCARD US$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 / 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$150 / kanal.
Estimasi ke US biaya / menit US$ Rp Rp. 75 Estimasi ke US biaya SLI 001 Rp / 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

26 Personal Iphone Calling

27 Intranet Communications

28 Remote Call Forwarding

29 Distributed Call Center

30 Virtual PBX

31 Line Doubling

32 Mobile User

33 Mobile User 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 dll). H 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 H.323 Gatekeeper
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 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 Kompresi Kbps MIPS ms MOS 64 0.34 0.125 4.1 32 14 3.85
G.711PCM 64 0.34 0.125 4.1 G.726 ADPCM 32 14 3.85 G.728 LD-CELP 16 33 0.625 3.61 G.729 CS-ACELP 8 20 10 3.92 G.729 x2 Encoding 3.27 G.729 x3 Encoding 2.68 G.729a CS-ACELP 10.5 3.7 G MPMLQ 6.3 30 3.9 G ACELP 5.3 3.65

52 MOS vs. DSP Price

53 Intermediate Solution VoIP

54 Interkoneksi Suara-Data-Suara

55 Interkoneksi PC-Telepon

56 Gatekeeper Lucent PacketStar IP Gatekeeper Cisco CallManager Quicknet
DSO calls / day (one zone) calls / day (multi zone) Cisco CallManager Windows NT Quicknet H.323 Internet SwitchBoard

57 Gateway Lucent PathStar Cisco DE-30+ Cisco AT-2, 4, 8 80.000 POTS
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 The new world Box reliability
Network availability

63 Network Availability

64 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).

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) Layer 2 (MAC) schemes
IP Precedence; VoIP  5. Differentiated Services Code Point (DSCP) Layer 2 (MAC) schemes Voice  RTP Voice  UDP Voice  Port

78 Prioritizing Voice Traffic Data Traffic Priority Queuing (PQ)
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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