VoIP

Onno W. Purboonno@indo.net.id

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 http://openphone.org http://www.pulver.com

Outline End User Perspective Conceptual Framework Next Generation Telco ..

End User - Internet Telephone

Komponen VoIP / Menit Telkom Rp. 75 / menit ISP Rp. 75 / menit Hook-off Service

http://www.net2phone.com

Delay <250ms

Biaya SLI / Menit (1US$=Rp8000)

Country Peak Normal

Disc VoIP

US 9900 8300 6230 1350

Singapore

6780 5650 4240 2550

Taiwan 9960 8300 6270 4070

Jepang 11286 9400 7050 2310

Hong Kong

9960 8300 6230 2710

Solusi Kantor Kecil / Rumah Satu (1) Saluran VoIP

Internet PhoneJACK US$150 Internet LineJACK US$220 Internet PhoneCARD US$170

Komunitas WARNET Asosiasi-warnet@itb.ac.id Free subscribe:

Asosiasi-warnet-subscribe@itb.ac.id

Komunitas e-commerce Mastel-e-commerce@egroups.com Warta-e-commerce@egroups.com E-commerce@itb.ac.id

Kebutuhan WARNET Line telepon koin Leased line analog

Regional Network / DIVNET Akses ke box JAMUS V.35 / RS.449

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

Teknologi VoIP sederhana

Internet Telephone

Dialer

Video Conference

Internet PhoneJACK

Connection PhoneJACK

Internet PhoneCARD

Voice Quality Comparison

Solusi Gateway Sederhana

VoiceTronix (8 port)

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 Ease of Installation. Infrastructure. Flexibility. Compatibility. Ease-of-Use. Quality. Cost Growth Path. Base for Applications.

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

Personal Iphone Calling

Intranet Communications

Remote Call Forwarding

Distributed Call Center

Virtual PBX

Line Doubling

Mobile User

Mobile User Internet Locator Service (ILS) Mapping Name Number

Dynamic IP

Internet Locator Service (ILS) http://www.icq.com

ILS & chat system http://www.tzo.com

Dial your DNS name.

Conceptual Framework H.323

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

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.

Open Standard

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

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.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 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.

H.323/PSTN Gateway

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.

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.

Gatekeeper Zone

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.

Metoda KompresiKompresi Kbps MIPS ms MOSG.711PCM 64 0.34 0.12

54.1

G.726 ADPCM 32 14 0.125

3.85

G.728 LD-CELP 16 33 0.625

3.61

G.729 CS-ACELP 8 20 10 3.92G.729 x2 Encoding 8 20 10 3.27G.729 x3 Encoding 8 20 10 2.68G.729a CS-ACELP 8 10.5 10 3.7G.723.1 MPMLQ 6.3 16 30 3.9G.723.1 ACELP 5.3 16 30 3.65

MOS vs. DSP Price

Intermediate Solution VoIP

Interkoneksi Suara-Data-Suara

Interkoneksi PC-Telepon

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 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.

Next Generation Telco

Split Data & Voice Network

Converged Enterprise Network

Philosophy The old world

Box reliability

The new world Network availability

Network Availability

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).

Campus Network

How? – Detailed ..

End-to-End 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)

Low Cost of Ownership

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.

WAN QoS-Enabling Tech.

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 Voice Traffic

Priority Queuing (PQ) Data Traffic

weighted fair queuing (WFQ) class-based weighted fair queuing

(CBWFQ)

Prioritizing

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 Multiple access nonbroadcast

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

Issue QoS - Campus Network Aggregation points where many

links aggregate into an uplink. aggregation points where speed

mismatches occur.

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 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 IP Telephony Unified Messaging IP Contact Center

VoIP

Unified Messaging

IP Contact Center

Migration Strategies

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