VoIP

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VoIP

• Onno W. Purbo
• onno_at_indo.net.id

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Arah Perkembangan
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Philosophy

• The old world
• Box reliability
• Centralized
• The new world
• Network availability
• Distributed

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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

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Outline

• End User Perspective
• Conceptual Framework
• Next Generation Telco ..

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End User - Internet Telephone
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Komponen VoIP / Menit

• Telkom Rp. 75 / menit
• ISP Rp. 75 / menit
• Hook-off Service
• http//www.net2phone.com
• Delay lt250ms

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Biaya SLI / Menit (1USRp8000)
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Solusi Kantor Kecil / Rumah

• Satu (1) Saluran VoIP
• Internet PhoneJACK US150
• Internet LineJACK US220
• Internet PhoneCARD US170

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Komunitas WARNET

• Asosiasi-warnet_at_itb.ac.id
• Free subscribe
• Asosiasi-warnet-subscribe_at_itb.ac.id
• Komunitas e-commerce
• Mastel-e-commerce_at_egroups.com
• Warta-e-commerce_at_egroups.com
• E-commerce_at_itb.ac.id

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Kebutuhan WARNET

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

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WARNET tanpa Telkom

• WARNET ke Internet
• Satellite DirectPC US200 / card
• KabelVision Rp. 300.000 / bulan
• Jaringan WARNET
• 2-11 Mbps 2.4 GHz US250 / card

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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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Internet PhoneJACK
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Connection PhoneJACK
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Internet PhoneCARD
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Voice Quality Comparison
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Solusi Gateway Sederhana
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VoiceTronix (8 port)
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VoIP untuk WARNET

• Investasi WARNET
• Invest Card DSP US150 / kanal.
• Estimasi ke US biaya / menit
• US0.13 Rp. 75 Rp. 75
• Estimasi ke US biaya SLI 001
• Rp. 9900-8300 / menit

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Issue Desktop VoIP Solution

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

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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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Intranet Communications
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Remote Call Forwarding
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Distributed Call Center
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Virtual PBX
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Line Doubling
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Mobile User
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Mobile User

• Internet Locator Service (ILS)
• Mapping Name Number ? Dynamic IP

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Internet Locator Service (ILS)

• http//www.icq.com
• ILS chat system
• http//www.tzo.com
• Dial your DNS name.

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Conceptual Framework

• H.323

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H.323 Benefit

• Codec Standards.
• Interoperability.
• Network Independence.
• Platform Application Independence.
• Multipoint Support.
• Bandwidth Management.
• Multicast Support.
• Flexibility.
• Inter-Network Conferencing.

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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.

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Open Standard
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Komponen H.323

• Terminal
• Gateway
• Gatekeeper
• Multipoint Control Unit (MCU)

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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.

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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)

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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.

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H.323/PSTN Gateway
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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.

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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.

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Gatekeeper Zone
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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
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MOS vs. DSP Price
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Intermediate Solution VoIP
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Interkoneksi Suara-Data-Suara
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Interkoneksi PC-Telepon
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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

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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.

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Next Generation Telco
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Split Data Voice Network
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Converged Enterprise Network
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Philosophy

• The old world
• Box reliability
• The new world
• Network availability

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Network Availability
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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).

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Campus Network
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How? Detailed ..
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End-to-End Architecture
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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)

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Low Cost of Ownership
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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.

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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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Link-Efficiency Techniques

• Voice Compression (e.g. G.723).
• Compressed RTP
• 40 byte IPUDPRTP ? 2-4 bytes.
• Voice Activity Detection (VAD).
• Link Fragmentation Interleaving.
• Frame Relay FRF.12
• Serial Link Multilink PPP (MLP).

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Traffic Shaping

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

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Issue QoS - Campus Network

• Aggregation points where many links aggregate
  into an uplink.
• aggregation points where speed mismatches occur.

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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.

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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.

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Application

• IP Telephony
• Unified Messaging
• IP Contact Center

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VoIP
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Unified Messaging
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IP Contact Center
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Migration Strategies
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Terima Kasih
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