Cisco Voice Concepts
AVVID
Architecture for Voice, Video, and Integrated Data
‘Emerging Voice Technologies’
Presentation_ID
© 1999, Cisco Systems, Inc.
1
Peter Tomsu
aptomsu@cisco.com
Senior Consulting Engineer
Cisco Enterprise Line Of Business Technical Consultancy
Presentation_ID
© 1999, Cisco Systems, Inc.
2
Agenda
• 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
IBM Training Session 1-FEB00- Slide number 3 of 43
www.cisco.com
The World Is Changing
Presentation_ID
© 1999, Cisco Systems, Inc.
4
Copyright, 1995-1999 Network World,
Inc. All rights reserved.
http://www.nwfusion.com/buzz99/buzzcon.html
• Technology enhancements
• Standards
• Costs
IBM Training Session 1-FEB00- Slide number 5 of 43
www.cisco.com
The World is changing….
IBM Training Session 1-FEB00- Slide number 6 of 43
www.cisco.com
Personalised Services
IBM Training Session 1-FEB00- Slide number 7 of 43
www.cisco.com
Communication Trends
“
E-mail exceeded voice as primary
business communication medium in 1998.
”
Frost and Sullivan
IBM Training Session 1-FEB00- Slide number 8 of 43
www.cisco.com
The Trend Continues
IBM Training Session 1-FEB00- Slide number 9 of 43
www.cisco.com
New World Created
by Explosive Data Growth
“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
UK voice network will be replaced by a system based on internet technology.”
Bill Cockburn, BT UK MD
Source: Financial Times, November 5 1998
6
Relative Load
5
New World
Old World
Data
4
3
2
Voice
1
0
1990
1991
1992
1993
1994
1995
1996
1997
Year
Source: ElectroniCast, BT Alex Brown Research
IBM Training Session 1-FEB00- Slide number 10 of 43
www.cisco.com
1998
1999E
2000E
Networking Trends
Presentation_ID
F0_4339_c1
© 1999, Cisco Systems, Inc.
11
Today’s Networks
• 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
Dial
PBX
Cable
DSL
Desktop Video
E-Mail
Voice Mail
Web
Circuits
E-Commerce
Voice
TDM
IP
H.323
Extranet
H.320
ISDN
Video
Room-Based
IBM Training Session 1-FEB00- Slide number 12 of 43
www.cisco.com
MultiService Applications
• Appliance Convergence
– All applications onto an integrated platform
– Includes telephony
•
Customer Services
•
•
“
Voice,
Unified Messaging
& Cisco See Voice As
– Voicemail & Email
Another Latency-Sensitive
Remote Working
IP Application
– Access to information is now key !
– Virtual Call Centres
• Distance Learning
”
– Desktop Video
– Live chat back
IBM Training Session 1-FEB00- Slide number 13 of 43
www.cisco.com
Internet Ecosystem
• New World Architecture
– Highly Adaptive, Open, Scalable, and Converged
DSL
Cable
Web
E-Mail
Dial
Network PBX
IP
IBM Training Session 1-FEB00- Slide number 14 of 43
IP Phone
E-Commerce
Data
Extranet
Internet Call
Center
ISDN
Video
www.cisco.com
Packetized
Voice
So What Can We Do To Voice ?
Presentation_ID
© 1999, Cisco Systems, Inc.
15
3 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
IBM Training Session 1-FEB00- Slide number 16 of 43
www.cisco.com
Before we do, how do we make a call today ?
Presentation_ID
© 1999, Cisco Systems, Inc.
17
Today’s Carrier Voice Infrastructure
Customer
Customer
Premise
Premise
Local
LocalCO
Interexchange
Interexchange
CO
Class 5
Switch
DS0
Class 4
Switch
DS1
DS0
Ethernet
DS1
DS1
Class 4
Switch
DS0
DS1
3/1
DACS
DS3
DS3
SONET
ADM
OC48
DS0
DS1
~
~
~
DS3
WDM
~
~
~DS3
DS0
DS0
Ethernet
DS1
DS3
DS3
DS1
SONET
ADM
OC-48c
OC48
OC48
Need to make this simpler, flexible, and cheaper.
IBM Training Session 1-FEB00- Slide number 18 of 43
Class 5
Switch
Customer
Customer
Premise
Premise
DS1
3/1
DACS
OC-48c
OC-48c
OC-48c
OC3/12
Local
Local CO
CO
www.cisco.com
OC3/12
VoTDM
Voice Over TDM
Let’s leave it alone option
Presentation_ID
© 1999, Cisco Systems, Inc.
19
VoTDM
• 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
IBM Training Session 1-FEB00- Slide number 20 of 43
www.cisco.com
VToA
Voice Telephony Over ATM
Let’s change the transport mechanism option
Presentation_ID
© 1999, Cisco Systems, Inc.
21
Voice 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
n x T1/E1
T3/E3
PBX
T1/E1
OC-3
Foreign
ATM
Network
T1/E1
STM-1
PBX
IBM Training Session 1-FEB00- Slide number 22 of 43
PBX
PBX
www.cisco.com
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/E1
PB X
T1/E1
Voice
Switching
IBM Training Session 1-FEB00- Slide number 23 of 43
PB X
T1/E1
PBX
www.cisco.com
PB X
PBX
The Bandwidth
• For CBR
– E1 takes 2.3 Mb/s
• For DBCES
– Depends on the number of active channels
• For VBR
ATM Header
5
DLCI
6
Voice Header
PAD
Payload: 30
AAL5
4
8
7 - 14 kbit/s of b/w per call
IBM Training Session 1-FEB00- Slide number 24 of 43
www.cisco.com
VoIP
Voice Over IP
Let’s move to the New World option
Presentation_ID
© 1999, Cisco Systems, Inc.
25
The Standards Based Voice Approach
• H.323 Devices
Interoperability?
YES! ITU H.323
– Gatekeeper (admission & control) & Gateway (IP to TDM)
– MCU (conference mgr. & bridge)
– Client (phone, PC, etc.)
• H.323 Signalling & Control
– H.225 - Signalling & Packetization
Gatekeeper
MCU
IP Phone (Client)
– H.245 - Media Control
– H.235 - Security
Packet LAN
– H.450 - Supplementary Services
– T.120 - Data
• H.323 Media Formats
IP Gateway
(to PSTN)
– G.711 (64Kbps), G.723.1 (6.4Kbps & 5.3Kbps), G.729 (8Kbps), H.261, H.263 (video)
IBM Training Session 1-FEB00- Slide number 26 of 43
www.cisco.com
Basic VoIP
Legacy Phone to Legacy Phone
Phone to Phone
3600
3600
FXS
FXS
Intranet
PBX Trunking
Phone to Phone through PBXs and Key Systems
3600
E&M
3600
Intranet
E&M
Key System
IBM Training Session 1-FEB00- Slide number 27 of 43
PBX
www.cisco.com
Converged IP Infrastructures
PBX
3640
PBX
V
3620
V
PSTN
4 to 12
Analogue ports
QoS
WAN
(Intranet)
V
3640
Branch Office
Headquarters
• Call routing is still really in the domain of the PBX
IBM Training Session 1-FEB00- Slide number 28 of 43
www.cisco.com
Bandwidth Per IP Call
• 20ms @ 8kbit/s yields 20 byte payload of compressed voice and
40 byte header
UDP (8)
IP Header (20)
RTP (12)
PAYLOAD : 20
Header 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 !
IBM Training Session 1-FEB00- Slide number 29 of 43
www.cisco.com
AVVID
Architecture for Voice, Video, and Integrated Data
Presentation_ID
F0_4339_c1
© 1999, Cisco Systems, Inc.
30
Old World Architectures
Mainframe cabinet
Yesterday’s
PBX
Voice Path (TDM)
Proprietary
Processor
Card(s)
Signaling Path
Proprietary
interface
Proprietary
Ckt switch
Card(s)
Applications
(Voicemail/IVR)
Proprietary
interface
Proprietary
Line
Card(s)
Proprietary
Trunk
Card(s)
PSTN
Proprietary
terminals
Proprietary interface
IBM Training Session 1-FEB00- Slide number 31 of 43
www.cisco.com
Standard interface
Cisco AVVID  An End-to-End Architecture
Clients
Infrastructure
Applications
Cisco IP Fabric
Intelligent Network Services
CallManager
Servers
Message
Servers
Softphone
Message
Telephony
Server
Application
Servers
Video
Platforms
PCs
IP Phones
Gateway
Switch
• Distributed
• Adaptive
IBM Training Session 1-FEB00- Slide number 32 of 43
Router
• Open
• Manageable
www.cisco.com
Content
Content
Server
Servers
Paging
Directory
Server
Servers
Cisco 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.
Voice Mail
Email
Fax
Amteva
Enterprise
uOne
APPLICATIONS
SMTP
ICR
Intelligent
Call Router
LDAP
TAPI, JTAPI
Call
Manager
CALL PROCESSING
Call Admission,
Call Routing
SIP, MGCP
Directory
Call
Manager
PSTN
IP
Network
INFRASTRUCTURE
Router
RSVP
CLIENTS
IP, H323, SIP, MEGACO
IBM Training Session 1-FEB00- Slide number 33 of 43
www.cisco.com
Cisco 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.
Call Manager Appliance
Voice Path (TDM)
Signaling Path
Signaling
Interface
Appliance
Applications Server
(Voicemail/IVR)
Ethernet phones
and
PC applications
PSTN
Media/signaling
interface
IBM Training Session 1-FEB00- Slide number 34 of 43
TCP/IP
Network
Media/signaling
interface
www.cisco.com
Trunk interface
Cisco Architecture Solutions
Branch Office , Campus Voice, Telecommuter Reach, Virtual
Call Centre, Contact Centre, & Unified Messaging
Presentation_ID
F0_4339_c1
© 1999, Cisco Systems, Inc.
35
Branch Office Solution
• CCN based Call Processing
• Connects to both VoIP or PSTN
• PBX interwork at Central site
• Current Branch Options
PSTN
• Data network enhances apps
H.323
VoIP
– virtual call center
– unified messaging
I
P
I
P
Cisco
Call Manager
IBM Training Session 1-FEB00- Slide number 36 of 43
www.cisco.com
H.323
eg NetMeeting
Enterprise 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
PBX
P
S
T
N
PSTN
Enterprise
Network
PBX
IBM Training Session 1-FEB00- Slide number 37 of 43
www.cisco.com
x237
Campus 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
IBM Training Session 1-FEB00- Slide number 38 of 43
www.cisco.com
PBX
What is needed ?
Presentation_ID
F0_4339_c1
© 1999, Cisco Systems, Inc.
39
Applications Support Infrastructure
End to End
Converged
WAN
Converged
End to end
IP
Voice
IP Telephony
New World
Applications
C/Centre
UM
Internet
Business
Solutions
CRM, WO,
SCM
Ecosystem Partners
IBM Training Session 1-FEB00- Slide number 40 of 43
www.cisco.com
Summary & Conclusions
Presentation_ID
F0_4339_c1
© 1999, Cisco Systems, Inc.
41
Summary & 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.
IBM Training Session 1-FEB00- Slide number 42 of 43
www.cisco.com
Presentation_ID
© 1999, Cisco Systems, Inc.
www.cisco.com
43