VSAT

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VSAT VoIP

• Onno W. Purbo
• Onno_at_indo.net.id

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Fokus Pembicaraan ..

• VSAT IP
• VoIP
• Share Akses (kalau ada waktu)

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VSAT
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Spesifikasi ..

• Antenna Kecil lt 1 meter s/d 3 meteran
• Frekuensi Umumnya C-Band (4-6GHz)
• Kalau berani mencoba Ku-Band

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Aplikasi

• Receive Only
• Transmit / Receive

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Receive Only

• Stock market other news broadcasting
• Training or continuing education from a distance
• Distribute financial trends analyses
• Introduce new products at geographically
  dispersed locations
• Update market related data, news
• Distribute video or TV programs
• Distribute music in stores public areas
• Relay advertising to electronic signs in retail
  stores

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Konvensional DVB
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PC DVB Card
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Transmit / Receive

• Interactive computer transactions
• Internet
• Video Teleconferencing
• Database inquiries
• Bank transactions, ATM
• Reservation systems
• Distributed remote process control
• Voice communications
• Electronic fund transfer at Point-of-Sale
• E-mail

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Konfigurasi VSAT

• Point To Point (SCPC)
• Point To Multipoint (TDM-TDMA)
• On Demand (DAMA)

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Single Channel Per Carrier
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SCPC Bandwidth
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TDM-TDMA
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TDM-TDMA Bandwidth
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Demand Assigned Multiple Access (DAMA)

• Network Control System (NCS) ? Switch Board di
  Angkasa.
• Jika ada node yang membutuhkan hubungan frekuensi
  baru di alokasikan.
• Membebaskan frekuensi jika tidak digunakan.
• Mendukung operasi full mesh, point-to-point,
  point-to-multipoint.

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Inti VSAT IP

• Tambahkan Router dibelakang modem VSAT

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VoIP
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Model Usaha VoIP
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Dalam Bahasa Sederhana ..
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Telp Biasa vs. VoIP

• Hanya satu penumpang

• Banyak Penumpang

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Teknologi VoIP sederhana
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Internet Telephone
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Dialer
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Video Conference
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Voice Quality Comparison
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VoIP Blaster US50-an
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Internet LineJACK US99
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Infoaccel US99.95
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PCMCIA ShelCad
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Solusi Gateway Sederhana
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VoiceTronix (8 port)
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InfoGate 3010 (4 Port)
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iEnsemble! 8 port
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Planet VoIP Gateway
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Aplikasi Desktop VoIP

• IntraNet Communication
• Remote Call Forwarding
• Distributed Call Center
• Virtual PBX
• Line Doubling
• Personal Iphone Calling

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Personal Iphone Calling
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Distributed Call Center
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Line Doubling
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Isu Quality of Service (QoS)

• Kekurangan Bandwidth
• Delay terlalu lama.
• Jitter / Variasi delay.

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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.

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Metoda Kompresi
Kompresi Kbps MIPS ms MOS
G.711PCM 64 0.34 0.125 4.1
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 3.92
G.729 x2 Encoding 8 20 10 3.27
G.729 x3 Encoding 8 20 10 2.68
G.729a CS-ACELP 8 10.5 10 3.7
G.723.1 MPMLQ 6.3 16 30 3.9
G.723.1 ACELP 5.3 16 30 3.65
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MOS vs. DSP Price
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WAN QoS-Enabling Tech.
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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

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Prioritizing

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

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Prioritizing
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Sharing Akses
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Konsep WARNET Konvensional
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Konsep WARNET

• Share Resource Reduce Cost
• Investasi Rp. 20-150 juta
• RoI 8 bulan s/d 2 tahun
• Community Based
• Asosiasi-warnet_at_yahoogroups.com
• Asosiasi-warnet-broadband_at_yahoogroups.com
• Indowli_at_yahoogroups.com

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Mengembangkan Konsep

• WARNET ..
• RT/RW-Net
• Kelurahan Net
• Mall Net
• Perkantoran Net
• Apartemen Net

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Sharing Bandwidth

• Akses Satelit
• Downlink rata-rata 1.1-1.5Mbps
• US3000-6000 / bulan
• Rp. 24-48 juta / bulan
• Sharing Bandwidth
• WARNET Rata-2 Rp. 2-3 juta / bulan

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One Way Satellite
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Two Way Satellite
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Share Access Wireless 11Mbps

• Lokasi rumah Onno W. Purbo

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Spesifikasi PC Gateway

• Pentium 166MHz
• Memory 64Mbyte
• Harddisk 2Gbyte
• VGA Card S3 2Mbyte
• Running Linux Mandrake 8.0

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Spesifikasi Link

• 24 jam operasional
• 11Mbps ke Askes Point
• 256Kbps ke Internet
• Rp. 330.000 / bulan (500MByte)
• Tanpa Telkom Sama Sekali

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Konfigurasi LAN

• UTP
• 10Mbps shared bus
• Hub bekas (Rp. 75.000 / buah)
• Tarik kabel UTP ke tetangga
• Tembok di bor

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Wireless 11Mbps PCI Card
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2.4Ghz Ant.