1Presentation_ID © 1999, Cisco Systems, Inc. Cisco Voice Concepts AVVID Architecture for Voice,...

Cisco Voice ConceptsAVVID

Architecture for Voice, Video, and Integrated Data

‘Emerging Voice Technologies’

Architecture for Voice, Video, and Integrated Data

‘Emerging Voice Technologies’

Peter Tomsuaptomsu@cisco.comPeter Tomsuaptomsu@cisco.com

Senior Consulting Engineer

Cisco Enterprise Line Of Business Technical Consultancy

Senior Consulting Engineer

Cisco Enterprise Line Of Business Technical Consultancy

www.cisco.comIBM Training Session 1-FEB00- Slide number 3 of 43

AgendaAgenda

• The World Is Changing

• Future Networking Trends

• Packet Voice

–The Choice

–VToA/VoFR or VoIP/VoIPoFR

• Cisco AVVID Architecture

• What is needed to make this work

• Summary & Conclusions

The World Is ChangingThe World Is Changing

http://www.nwfusion.com/buzz99/buzzcon.html

• Technology enhancements

• Standards

• Costs

The World is changing….The World is changing….

Personalised ServicesPersonalised Services

“”

E-mail exceeded voice as primarybusiness communication medium in 1998.

Frost and Sullivan

Communication TrendsCommunication Trends

The Trend ContinuesThe Trend Continues

1990 1991 1992 1993 1994 1995 1996 1997 1998 1999E 2000E

New WorldNew World

Old WorldOld World

Source: ElectroniCast, BT Alex Brown Research

New World Createdby Explosive Data Growth

““Already there is more data transmitted over BT’s PSTN network than voice calls….Already there is more data transmitted over BT’s PSTN network than voice calls….Over the course of the next few years, BT’s entire Over the course of the next few years, BT’s entire

UK voice network will be replaced by a system based on internet technology.”UK voice network will be replaced by a system based on internet technology.”Bill Cockburn, BT UK MDBill Cockburn, BT UK MD

Source: Financial Times, November 5 1998

Networking TrendsNetworking Trends

• Today’s networks were not designed to handle the future converged data, voice, and video demands

–Separate infrastructures for data, voice, and video

–Application integration difficult

Today’s NetworksToday’s Networks

Circuits

Voice Mail

DSLCableDial

Extranet

E-Commerce

Room-Based

Desktop Video

VoiceE-Mail

MultiService ApplicationsMultiService Applications

• Appliance Convergence

–All applications onto an integrated platform

–Includes telephony

• Customer Services

–Virtual Call Centres

• Unified Messaging

–Voicemail & Email

• Remote Working

–Access to information is now key !

• Distance Learning

–Desktop Video

–Live chat back

Voice, & Cisco See Voice As

Another Latency-SensitiveIP Application

Packetized Voice

WebE-Mail

DSLCable

ISDNExtranet

E-Commerce

IP Phone

Network PBX

Internet Call Center

Internet EcosystemInternet Ecosystem

• New World Architecture–Highly Adaptive, Open, Scalable, and Converged

So What Can We Do To Voice ?So What Can We Do To Voice ?

3 Options3 Options

• Do nothing–Well it works so don’t try and fix it !

• Play safe–Lets use another transport system, but leave the PBX’s in control !

• Move into the real world–Converge the networks down to a single infrastructure that includes voice

Let’s look at each one

Before we do, how do we make a call today ?Before we do, how do we make a call today ?

OC3/12

CustomerPremise

LocalCO Interexchange Local CO

DS3DS3DS3

DS1DS1

OC48 OC48

DS3 DS3DS3

DS1DS1

3/1 DACS

SONETADM

3/1 DACS

DS0DS0 DS0Class 5Switch

Class 4Switch

Class 5Switch

CustomerPremise

Today’s Carrier Voice InfrastructureToday’s Carrier Voice Infrastructure

Need to make this simpler, flexible, and cheaper.

CustomerPremise

LocalCO

Interexchange LocalCO

OC-48c

Ethernet WDM

OC-48c

EthernetDS1

OC-48c

~~~~~~~~~~~~

VoTDMVoice Over TDM

Let’s leave it alone option

VoTDMVoice Over TDM

Let’s leave it alone option

VoTDMVoTDM

• Proprietary–At the Enterprise level

• Based upon switching at the 64K DSO

• Pre-dominantly static connections

• Adds, moves and changes are difficult–When did you last move office ?

• Hard to adapt to new technology trends–My PBX is IP ready ? What does that actually mean ?

• Hierarchical deployments–Expensive

VToAVoice Telephony Over ATM

Let’s change the transport mechanism option

VToAVoice Telephony Over ATM

Let’s change the transport mechanism option

Voice Telephony Over ATM - VToAVoice Telephony Over ATM - VToA

• Solution –Leased Line Replacement - Digital Connection

–Various Compression Techniques

–Enables cost savings through better use of bandwidth

–Standards-based compression combined with silence suppression & dynamic voice switching offers a scalable solution

ForeignATM

NetworkOC-3OC-3 STM-1STM-1

T3/E3T3/E3 n x T1/E1n x T1/E1

T1/E1T1/E1 T1/E1T1/E1

PBXPBX

Advanced VToA Advanced VToA

• Interpret the CCS from the attached PBX’s and route according to the profile that has been set in the VSC system

–Will include bearer capability statements ensuring correct compression is used.

• High-performance, highly scalable, distributed voice switching capability

• Majority of PBX signalling systems supported

• Reduces routing complexity and costs.

T1/E1PBX

T1/E1 PBX

Voice Switching

7 - 14 kbit/s of b/w per call7 - 14 kbit/s of b/w per call

Payload: 305 8

ATM Header DLCI

PAD AAL5Voice Header

The BandwidthThe Bandwidth

• For CBR–E1 takes 2.3 Mb/s

• For DBCES–Depends on the number of active channels

• For VBR

VoIPVoice Over IP

Let’s move to the New World option

VoIPVoice Over IP

Let’s move to the New World option

The Standards Based Voice ApproachThe Standards Based Voice Approach

IP Gateway(to PSTN)

IP Phone (Client)Gatekeeper

Packet LAN

Interoperability?YES! ITU H.323

• H.323 Devices

–Gatekeeper (admission & control) & Gateway (IP to TDM)

–MCU (conference mgr. & bridge)

–Client (phone, PC, etc.)

• H.323 Signalling & Control

–H.225 - Signalling & Packetization

–H.245 - Media Control

–H.235 - Security

–H.450 - Supplementary Services

–T.120 - Data

• H.323 Media Formats

–G.711 (64Kbps), G.723.1 (6.4Kbps & 5.3Kbps), G.729 (8Kbps), H.261, H.263 (video)

Basic VoIPBasic VoIP

Phone to Phone3600 3600

FXS FXSIntranet

Phone to Phone through PBXs and Key Systems

3600 3600E&M E&M

Intranet

Key System PBX

Legacy Phone to Legacy Phone

PBX Trunking

Branch Office Headquarters

4 to 12 Analogue ports

QoSWAN

(Intranet)VV

Converged IP InfrastructuresConverged IP Infrastructures

Branch Office Headquarters

QoSWAN

(Intranet)VV

• Call routing is still really in the domain of the PBX

IP Header (20) UDP (8) RTP (12)

PAYLOAD : 20Header is 40 bytes

13 - 26 kbit/s of bandwidth per call

Compressing RTP Header gives 4-5 PAYLOAD : 20

6-11 kbps of bandwidth per call !

Bandwidth Per IP CallBandwidth Per IP Call

• 20ms @ 8kbit/s yields 20 byte payload of compressed voice and 40 byte header

AVVID Architecture for Voice, Video, and Integrated Data

Old World ArchitecturesOld World Architectures

Yesterday’s PBX

Proprietary Ckt switch

Card(s)Proprietary

interface

Applications (Voicemail/IVR)

Voice Path (TDM)

Signaling Path

Proprietaryterminals

Proprietary interface

Proprietary Line

Card(s)

Proprietary Trunk Card(s)

Mainframe cabinet

Standard interface

Proprietary Processor

Card(s)Proprietary

interface

Cisco AVVID An End-to-End ArchitectureCisco AVVID An End-to-End Architecture

Softphone

MessageMessageServerServer

Telephony Telephony ApplicationApplication

ServersServersPagingPagingServerServer

DirectoryDirectoryServersServers

ContentContentServerServer

ContentContentServersServers

IP PhonesPCs

• Distributed

• Adaptive

• Distributed

• Adaptive

SERVICESERVICE SUPPORT

SUPPORT

Gateway Switch Router

Cisco IP FabricIntelligent Network Services

Platforms

InfrastructureClients Applications

• Open

• Manageable

• Open

• Manageable

MessageMessageServersServers

CallManagerCallManager

ServersServers

AmtevaAmtevaEnterpriseEnterprise

uOneuOne

Intelligent Intelligent Call RouterCall Router

Voice MailVoice MailEmailEmailFaxFax

DirectoryDirectoryCallCall

ManagerManager

CallCallManagerManager

IPNetwork

PSTNPSTN

RouterRouter

TAPI, JTAPITAPI, JTAPI

SIP, MGCPSIP, MGCP

SMTPSMTP

IP, H323, SIP, MEGACOIP, H323, SIP, MEGACO

LDAPLDAP

RSVPRSVP

Call Admission, Call Admission, Call RoutingCall Routing

CLIENTSCLIENTS

INFRASTRUCTURE

CALL PROCESSINGCALL PROCESSING

APPLICATIONS APPLICATIONS

Cisco AVVID : An Open ArchitectureCisco AVVID : An Open Architecture

• An architecture not an IP-PBX– IP-PBX : That's like calling automobiles horse less carriages. Convergence is

moving voice onto data networks, and the term ”IP - PBX" implies the opposite.

Cisco Voice StrategyCisco Voice Strategy

• Provide a network that allows calls to flow freely, and independent of what technology they traverse, with all the existing features you have come to expect, and more, whilst adhering to standards.

Signaling Interface

Call Manager Appliance

Voice Path (TDM)

Signaling Path

Trunk interfaceMedia/signalinginterface

Ethernet phonesand

PC applications

Media/signalinginterface

TCP/IPNetwork

Appliance

Applications Server (Voicemail/IVR)

Cisco Architecture Solutions Branch Office , Campus Voice, Telecommuter Reach, Virtual

Call Centre, Contact Centre, & Unified Messaging

Cisco Architecture Solutions Branch Office , Campus Voice, Telecommuter Reach, Virtual

Call Centre, Contact Centre, & Unified Messaging

H.323eg NetMeeting

H.323VoIP

CiscoCall Manager

Branch Office SolutionBranch Office Solution

• CCN based Call Processing

• Connects to both VoIP or PSTN

• PBX interwork at Central site

• Current Branch Options

• Data network enhances apps–virtual call center

–unified messaging

Enterprise Extension for TelecommuterEnterprise Extension for Telecommuter

• Enable popular features:–Hold, Call forward, Conference

• Easy integrate to call center apps

• Still make local phone call

• IP Telephony enables integrated mobility

x237EnterpriseNetwork

PBXPBX

Campus SolutionCampus Solution

• Campus Extension

• PBX scaling option–Prevent new spend on proprietary PBX solutions

• New Campus installations– Unified Cabling Infrastructure

– Open IP based solutions with end user mobility

– New Voice Apps e.g. unified messaging

– Reduced operations costs, e.g. adds/moves/changes

What is needed ?What is needed ?

Applications Support InfrastructureApplications Support Infrastructure

End to EndEnd to End

ConvergedConverged WANWAN

VoiceVoice

ConvergedConverged End to endEnd to end

IP TelephonyIP Telephony

New WorldNew World

ApplicationsApplications

C/CentreC/Centre UMUM

InternetInternet BusinessBusiness SolutionsSolutions

CRM, WO,CRM, WO, SCMSCM

Ecosystem Partners

Summary & ConclusionsSummary & Conclusions

Summary & ConclusionSummary & Conclusion

• Cisco AVVID Packet Voice Is A Real Solution–Choice of technologies, both integrate with each other.

–Essential support for legacy systems maintained

• Cisco AVVID Architecture–Powerful, flexible IP architecture that supports Intelligent Integrated Applications

• Cisco AVVID Advanced Applications–Unified Messaging, IP Contact Centres, Collaboration

• The world is changing, think hard about all new spend on old world infrastructure products - remember the quote from BT.

1Presentation_ID © 1999, Cisco Systems, Inc. Cisco Voice Concepts AVVID Architecture for Voice,...

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