Transcript VoIP Onno W. Purbo
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
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 US Singapore Taiwan Jepang Hong Kong Peak 9900 Normal Disc 8300 6230 VoIP 1350 6780 9960 5650 8300 4240 6270 2550 4070 11286 9960 9400 8300 7050 6230 2310 2710
Solusi Kantor Kecil / Rumah Satu (1) Saluran VoIP Internet PhoneJACK Internet LineJACK Internet PhoneCARD US$150 US$220 US$170
Komunitas WARNET [email protected]
Free subscribe: [email protected]
Komunitas e-commerce [email protected]
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 Kompresi Kompresi G.711PCM
Kbps MIPS ms 64 0.34
MOS 0.125 4.1
G.726 ADPCM G.728 LD-CELP G.729 CS-ACELP G.729 x2 Encoding G.729 x3 Encoding G.729a CS-ACELP G.723.1 MPMLQ G.723.1 ACELP 32 16 8 8 8 8 6.3
5.3
14 33 20 20 20 10.5
16 16 10 10 30 30 0.125 3.85
0.625 3.61
10 10 3.92
3.27
2.68
3.7
3.9
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 Voice RTP 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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