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Voice over IP Networks
Content
 Market drivers
 Overview VoIP
 VOIP network solutions and products
 IN and SMC for VoIP network solutions
 Conclusion
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Voice over IP Networks
Market Drivers
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VoIP market drivers
Corporate network evolution: VoIP
 Replacement long-distance TDM by cheaper IP connectivity:
 possibility to outsource (VPN) --> cost savings
 use private or public (VPN mode) Voice Gateways
 simple Gatekeepers: addressing
 Usage of PCs as telephones: the “integrated workstation”
 Private Gatekeeper should contain PABX call functions
 New integrated voice-data services:
 integrated mail, conferencing, etc. --> added value
 implemented by voice-data (IP) application servers
 Integrate with world-wide VoIP --> cost savings and
possible added value
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VoIP market drivers
Corporate network evolution: VPN
 Possible impacts of VPN:
 outsource remote access services: wide access
 outsource open Internet access: wide access, performance
 outsource Intranet services: security
 Extranet services: authentication, security
 use IP for other services:
 voice, other data (tunneled)
 differentiated QOS, security
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VoIP and VPN impacts & timeframes
IP conquering the business telecom world
Operator
Corporate
PSTN
Current niche
VoIP (Call Compl, Toll)
'98-'00
Public IP
“Internet”
Private TDM
Private IP
(routers)
Private data
(X.25, FR)
Timeframe:
start commercial implementation - major deployment done
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Evolution telecom needs of an enterprise
in volume (% versus situation in ‘98)
 Voice:
900
- each year 50% to
VoIP
800
- VoIP: compression
700
32 kbps in ‘99,
5,3 kbps in ‘02
Non-IP
(SNA,
IPX, etc)
600
 Data volume: x2
every year
IP
500
Voice IP
400
 Not included: web
hosting (software
300
like Microsoft,
200
Netscape, ecommerce like Dell,
100
Cisco, etc.): can add
today orders of
0
'98
magnitude of IP
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Voice
TDM
'99
'00
'01
'02
Int. Ref : VOIP.ppt I.OZCAN Page 7
Voice over IP networks
Short term opportunities for Public VoIP
 Packet-based long distance & network interconnect:
“toll bypass”
 PC voice client application support (residential & business)
 PC to phone interoperability
 “Call Completion” for web surfers
 PBX trunk replacement for corporate networks
 Point to point
 Private routed network
 Public routed network (VPN)
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Voice over IP Network Solutions
An Overview
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VoIP Overview
Telephony access
 Voice Gateway: analogue - IP conversion
 Gatekeeper: address resolution - services
SMC
Gatekeeper
S12/E10
USER
Telephone user
IP
Voice
Gway
PC user
RAN
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VoIP Component Overview
 MultiVoice Gateway (Ascend)
 Terminates the native PSTN network interfaces (PRI, BRI)
 Supports various voice compression codecs
 Support ITU-H.323 protocol for Phone-to-Phone and
Phone-to-PC communications over the IP packet network
 SMC Gatekeeper
 Manages the H.323 zone(s) for a set of gateways and
PC endpoints
 Provides address translation: E.164 (telephone) to IP address
 Supports client registration
 PC Endpoints
 Any standard H.323-compliant PC software that supports
voice calls (e.g. NetMeeting or CoolTalk)
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VoIP Overview
“Fixed” access
 Public or Private Voice Gateway
 Gatekeeper: as for narrowband
SMC
Unique id
Gatekeeper
S12/E10
USER
Tel. nb.
IP
Tel. nb.
Voice
Gway
Tel. nb.
RAN
Fixed Access
ADSL, WLL, WAN, LAN, etc.
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ADSL ATM
VC
WLL id
LAN MAC
IP addr.
Int. Ref : VOIP.ppt I.OZCAN Page 31
IN and SMC for
VoIP network solutions
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IN services for telephone users
 Services:
SMP
Service Data &
Service logic
SCP
 freephone
Specialized Resources
INAP
 premium
 calling card
INAP
on
SS7
S12/E10
SSP
Service deployment
Service provision
IP (Intelligent Peripheral)
USER
ISUP
 VPN
 nb. portability
 etc.
Call Handling
Service triggering
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The SSP function is either
performed by a dedicated
switch or is integrated
in an existing exchange
(local or transit)
Int. Ref : VOIP.ppt I.OZCAN Page 33
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IN and SMC services for RAN and VoIP
Overview
IN services
for VoIP calls/
sessions
SCP
SMC
Gatekeeper
S12/E10
IP
SMC
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IP
USER
SMP
Web
based
IN svc
mgmt
IN services
for VoIP
dial-up
SCP
Voice
Gway
RAN
IN services for
Internet dial-up
Fixed Access
Int. Ref : VOIP.ppt I.OZCAN Page 35
Summary (1)
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Summary (2)
 Focus of current products:
 phone-to-phone dial-up (two step dial)
 corporate environment
 Alcatel directions:
 solutions for the public environment:
 carrier-class gateway
 gradual introduction of “full” telephony functionality
 ubiquitous access: dial-up, but also “fixed” networks such as
ADSL
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