Onno W. Purbo onno@indo.net.id VoIP overview Onno W. Purbo onno@indo.net.id.

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Presentation transcript:

Onno W. Purbo onno@indo.net.id VoIP overview Onno W. Purbo onno@indo.net.id

VoIP di COMDEX 2000

VoIP di COMDEX 2000 Lokasi Las Vegas, US Calling Card US$10 Waktu bicara US-Jakarta 90 menit Artinya .. Rp. 1000 / menit (US-Jakarta)

Gambaran Umum Internet

Model Usaha VoIP

Kerja Sederhana Telepon

Kerja sederhana VoIP

Konversi ke Paket Data

Penghematan Saluran ..

Dalam Bahasa Sederhana ..

Telp Biasa vs. VoIP Hanya satu penumpang Banyak Penumpang

Teknologi VoIP sederhana

Internet Telephone

Dialer

Video Conference

Internet PhoneJACK

Connection PhoneJACK

Voice Quality Comparison

Solusi Gateway Sederhana

VoiceTronix (8 port)

VoIP Profesional

Gatekeeper Lucent PacketStar IP Gatekeeper Cisco CallManager Quicknet 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 Cisco DE-30+ Cisco AT-2, 4, 8 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.

Conceptual Framework H.323

Open Standard

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

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 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.723.1 MPMLQ 6.3 30 3.9 G.723.1 ACELP 5.3 3.65

WAN QoS-Enabling Tech.

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 16383 - 32767

Prioritizing Voice Traffic Data Traffic Priority Queuing (PQ) 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).

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