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VoIP. Onno W. Purbo [email protected] 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

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Presentation Transcript
philosophy
Philosophy
  • The old world
    • Box reliability
    • Centralized
  • The new world
    • Network availability
    • Distributed
references
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
Outline
  • End User Perspective
  • Conceptual Framework
  • Next Generation Telco ..
komponen voip menit
Komponen VoIP / Menit
  • Telkom Rp. 75 / menit
  • ISP Rp. 75 / menit
  • Hook-off Service
    • http://www.net2phone.com
  • Delay <250ms
solusi kantor kecil rumah
Solusi Kantor Kecil / Rumah
  • Satu (1) Saluran VoIP
  • Internet PhoneJACK US$150
  • Internet LineJACK US$220
  • Internet PhoneCARD US$170
kebutuhan warnet
Kebutuhan WARNET
  • Line telepon koin
  • Leased line analog

Regional Network / DIVNET

  • Akses ke box JAMUS V.35 / RS.449
warnet tanpa telkom
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
voip untuk warnet
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
Issue Desktop VoIP Solution
  • Ease of Installation.
  • Infrastructure.
  • Flexibility.
  • Compatibility.
  • Ease-of-Use.
  • Quality.
  • Cost
  • Growth Path.
  • Base for Applications.
aplikasi desktop voip
Aplikasi Desktop VoIP
  • IntraNet Communication
  • Remote Call Forwarding
  • Distributed Call Center
  • Virtual PBX
  • Line Doubling
  • Personal Iphone Calling
mobile user1
Mobile User
  • Internet Locator Service (ILS)
  • Mapping Name Number  Dynamic IP
internet locator service ils
Internet Locator Service (ILS)
  • http://www.icq.com
    • ILS & chat system
  • http://www.tzo.com
    • Dial your DNS name.
h 323 benefit
H.323 Benefit
  • Codec Standards.
  • Interoperability.
  • Network Independence.
  • Platform & Application Independence.
  • Multipoint Support.
  • Bandwidth Management.
  • Multicast Support.
  • Flexibility.
  • Inter-Network Conferencing.
h 323 mengatur
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.
komponen h 323
Komponen H.323
  • Terminal
  • Gateway
  • Gatekeeper
  • Multipoint Control Unit (MCU)
terminal h 323
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 3231
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
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.
gatekeeper
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.
gatekeeper1
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.
isu quality of service qos
Isu Quality of Service (QoS)
  • Kekurangan Bandwidth
  • Delay terlalu lama.
  • Jitter / Variasi delay.
slide50
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.
gatekeeper2
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
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.
philosophy1
Philosophy
  • The old world
    • Box reliability
  • The new world
    • Network availability
network availability1
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).
open 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)
hierarchical wan design
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.
classification
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
Prioritizing
  • Voice Traffic
    • Priority Queuing (PQ)
  • Data Traffic
    • weighted fair queuing (WFQ)
    • class-based weighted fair queuing (CBWFQ)
link efficiency techniques
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
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
Issue QoS - Campus Network
  • Aggregation points where many links aggregate into an uplink.
  • aggregation points where speed mismatches occur.
qos campus network
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
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
Application
  • IP Telephony
  • Unified Messaging
  • IP Contact Center
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