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IP Telephony Helmut Schink. [email protected] +49 89 722 44523 Siemens AG ICN M CS 21 81359 München Hofmannstr. 51. Content. 1) Drivers 2) Principles 3) Application 4) Challenges 5) Standards 6) Current Product 7) Closing. Telephone total. - PowerPoint PPT Presentation
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1 ITU Workshop on IP Telephony, Geneva, June 2000
IP Telephony Helmut Schink
IP Telephony Helmut Schink
[email protected]+49 89 722 44523Siemens AGICN M CS 2181359 MünchenHofmannstr. 51
s
2 ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
3 ITU Workshop on IP Telephony, Geneva, June 2000
Driver for tomorrow’s communicationBitrate growth in data networks is higher
Source: ICN M CM, ITU, ISOC
Total average bitrate
Year1985
1
Gbit/s
1990
1995 2000 2005 2010 2015 2020
Telephone total
106
103
10-3
10-6
Internet
The internet becomes a second universal network besidesthe voice network.
The internet becomes a second universal network besidesthe voice network.
s
4 ITU Workshop on IP Telephony, Geneva, June 2000
Driver for tomorrow’s communicationVoice stays the main revenue generator
29%
20%
25%
0
50
100
150
200
250
300350
400
1993 1998 2003 Data & VAS CATV Voice
244
334
406Revenues*) in Billion DM
Voice service is lucrative for voice and data networkproviders
Voice service is lucrative for voice and data networkproviders
*) Revenue for Telecom Services in Western Europe Source: ICN M CM
0 < 1%
5 %
10 %
1998 2003 2005
3%
7%
Voice over IP Market Share *)
*) VoIP global call minutes as percentage of VoTDM global call minutes.The Impact on Telco Services and Revenues, OVUM Ltd. 1998
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5 ITU Workshop on IP Telephony, Geneva, June 2000
Driver for tomorrow’s communicationThe competition will be decided on services and price
With New Services conquer new markets differentiate from competition generate additonal
revenues
Traditional Services offered by all providers increased price competition
13% 17% 30%45%
1990 1995 2000 2005
Revenues p. Y. (in Bill. ECU) *
87%
90
83% 70% 55%
20%
0
40%
60%
80%
100%110 180 280
* Revenues in Europe Source: ICN M CM
The key to voice/data success lies in advanced multimediaservices and applications
The key to voice/data success lies in advanced multimediaservices and applications
Services are the key to voice/data success. They ...
save time and money increase convenience for the end
user generate additional call minutes are directly marketable create direct revenues promote subscriber loyalty provide a competitive edge in
deregulated markets
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6 ITU Workshop on IP Telephony, Geneva, June 2000
Operators’ Motivation to Deploy VoIP Services
Offering new and advanced services
Cost savings through efficiency of unified network
Cost savings through more bandwidth efficiency
Growing competitive pressure through VoIP
Avoidance of interconnection cost
Market pull from business customers
VoIP as an additional, low-cost service
Offloading peak traffic from the trad. voice n/w
Market pull from residential customers
Improved customer retention (for ISPs only)
Charge usage-based instead of flat rate (for ISPs only)
Operators’ Rating of Drivers for Voice over IPaverage of all surveyed operators
1 63 5
Interview basis: 16
very important not important42
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7 ITU Workshop on IP Telephony, Geneva, June 2000
Expected GW Features
Which features do operators expect ?(multiple votes per operator possible)
needed now needed in 2 years
0 4 8 12Number of votes
SS7Single-stage-dialingISUP transparency
Automatic Fax handlingIP QoS features
Automatic Modem handlingAutomatic DTMF handling
Availability 99.999%Line Redundancy
PSTN fallback incorporate in VoIP equipmentIVR (interactive voice response)
CO environmental conditionsCO rack integration (size)
Speech recognition (-> prepaid account)CO power supply
Additional voice compression standards
15 a
nsw
ers
tota
l
Co
nn
ecti
vit
yw
ith
PS
TN
s
8 ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
9 ITU Workshop on IP Telephony, Geneva, June 2000
PSTN / IN
IP NetworkGwy.Gwy.
Access isolated in eachAdministrative Domain
Clearing HouseBillingServices
Gatekeeper- / Telephony-Domain LocationServices TIPHON
IP Telephony-LocationServices IPTEL
ManagementServicesSNMP...
Trust CenterServices
Access open across Administrative Domains
IP Phone
Small EnterpriseTel. & IP Services e.g. Vocaltec
INServices
Decentralized Services
s
10 ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
11 ITU Workshop on IP Telephony, Geneva, June 2000
Subscriber Controlled Input via Internet (ISCI)
E-Mail Waiting Indication (EWI)
Call Waiting Internet Busy (CWIB)
Call Completion Internet Busy (CCIB)
Voice over Internet (VoI)
Improved Voice-over-Internet (IVoI)
Attraktive Internet Features
s
12 ITU Workshop on IP Telephony, Geneva, June 2000
IPOP
SwitchCore
Content Provider
PSTN/ISDN Internet
InterNode
Switch
Modem /VoIP -Process
Server / Router
Set-upVoIP call
Forward
CCIB: Functional Principle
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13 ITU Workshop on IP Telephony, Geneva, June 2000
web
VoIP/CCIBortelephone
• WCC contolls data- and voice- connection• WCC contolls data- and voice- connection
Web Call Center
ISPISP(Agent)(Agent)
WebserverWebserver(e.g. archive)(e.g. archive)
ISPISP(User)(User)
EWSD INTERNODEswitching system
WCC: Service
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14 ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
15 ITU Workshop on IP Telephony, Geneva, June 2000
IP Network
OperatorA Operator
B
1
Gateway Gateway
GatekeeperGatekeeper
Clearinghouse Service
ARQ
2AuthReq
3AuthRsp
5 SETUP
4ACF
6ARQ 7
ACF
Gatekeeper Pricing Protocol: Overview
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16 ITU Workshop on IP Telephony, Geneva, June 2000
"Trust by Wire" to "Trust by Authentication"• Trusted authorities must be deployed
e.g.: Trust centers issue security certificates / tokens
• Telco's are traditionally trusted Operation of trust centers generates new income (Verisign..)
• None repudiation evidence gatheringTrust centers can verify, trace and store CLI information forlater proof. This is currently a problem in IP networks
• . . .
"Trust by Wire" to "Trust by Authentication"• Trusted authorities must be deployed
e.g.: Trust centers issue security certificates / tokens
• Telco's are traditionally trusted Operation of trust centers generates new income (Verisign..)
• None repudiation evidence gatheringTrust centers can verify, trace and store CLI information forlater proof. This is currently a problem in IP networks
• . . .
Management: Trust And Authentication Services
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17 ITU Workshop on IP Telephony, Geneva, June 2000
Do users want anything but dial?
• Transparency for Today’s Devices Required?e.g.: G.3 FAX, modem, look and feel, RJ11 plug
• Real-time Billinge.g.: Coinboxes, Prepaid-Cards, and hotel billing
• Connection Setup TimeIs location finding fast enough?
• Call Blocking (Non Payment, 3rd Party ...)What are the requirements that can not be handled?
• . . .
Do users want anything but dial?
• Transparency for Today’s Devices Required?e.g.: G.3 FAX, modem, look and feel, RJ11 plug
• Real-time Billinge.g.: Coinboxes, Prepaid-Cards, and hotel billing
• Connection Setup TimeIs location finding fast enough?
• Call Blocking (Non Payment, 3rd Party ...)What are the requirements that can not be handled?
• . . .
Telephone User Habits / Paradigms:
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18 ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
19 ITU Workshop on IP Telephony, Geneva, June 2000
Standardization
TIPHON/ETSI is globally accepted as leading body for internet gateway standardization. (www.etsi.org/tiphon)
TIPHON/ETSI is globally accepted as leading body for internet gateway standardization. (www.etsi.org/tiphon)
ITU-T SG 16 concentrates on Multimedia Terminals and Security; develops IP Telephony Standard H.323; TIPHON provides input for this group. (www.itu.org)
ITU-T SG 16 concentrates on Multimedia Terminals and Security; develops IP Telephony Standard H.323; TIPHON provides input for this group. (www.itu.org)
International Telecomm. Union
IETF investigates interworking between Internet and Intelligent Networks. TIPHON influences via member organizations. (www.ietf.org)
IETF investigates interworking between Internet and Intelligent Networks. TIPHON influences via member organizations. (www.ietf.org)
Internet Engineering Task Force
TIPHON
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20 ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
21 ITU Workshop on IP Telephony, Geneva, June 2000
Siemens evolutionary strategy for carriers From EWSD to SURPASS with an open architecture
• Voice Features• Call Control• Access
• Voice Features• Call Control• Access
pro
pri
etar
y i/
fsEWSD
Siemens’ leverage: the large installed base and best in class voice features.Market requires: Open interfaces and decoupling of control and transport.Siemens’ leverage: the large installed base and best in class voice features.Market requires: Open interfaces and decoupling of control and transport.
VoATM
VoIP
EWSDCO
AccessAccess SURPASShiG 2000
SURPASShiG 1000
RAS
SU
RP
AS
S hiA
SURPASS hiQ
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22 ITU Workshop on IP Telephony, Geneva, June 2000
SURPASS hiQ Open Platform with standard interfaces
SURPASS hiQopen platform
SCP
IN
SS7Switch STP
PSTN / ISDN
H.323
Data NetworkData Network
GW
SS7STP
PSTN / ISDN
Switch
GW
Sig
nal
ling
Gat
eway
H.323
H.323
Open API for external ApplicationsRADIUS Server
Gatekeeper
H.323Endpoint
H.323Endpoint
Media GatewayController
SS7 SignallingGateway
H.323SignallingGateway
Call & Feature Server
Radius(AAA)
Open API Gatekeeper
Media Node
Open API forexternal applications
Registration andRouting Server
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23 ITU Workshop on IP Telephony, Geneva, June 2000
Multiservice Access – SURPASS hiA
SURPASS hiA
xDSLTDM
RAS
VoATM
VoIP
Gateway
IP / ATM backbone
Core Router
EdgeRouter
PBX
SM/L Enterprise
Access
ATM, FR/LL
SoHo residential
POTS/ISDNsubscriber
SCPLNP
IN INAPCall Feature Server,
Media Gateway Controller
Open API
PSTN/ISDNnetwork
other carrier
SwitchSwitch
Switch
POTS/ISDNsubscriber
NetworkServers
AAA Server, Reg. & Routing Server
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24 ITU Workshop on IP Telephony, Geneva, June 2000
Siemens Corporate GSM Solution
InternetQoS LAN
WANCorporateIP network
PSTNISDN
Router
PBXGateway
WARPWARP
Firewall
H.323 / GSMGatekeeper
OAM ISDN PRAServere.g. Voicemail,
Directory
Pico BTSServer
PBXNetwork
GSM Public Operator
BTS
BTS
Abis
AbisMSC
Gateway
OMC-B
OAMGateway
MCUE+G If
MSC
BSC
HLR
SGSN
GPRSGateway
H.323 Terminal
s
25 ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
26 ITU Workshop on IP Telephony, Geneva, June 2000
Visions: Is IP switching the solution for voice?
PSTN
IPRouter
IPTelGwy
IPRouter
Mo
de
ms
xD
SL
Ca
ble
H
ea
d
A/DAnalog loop
xDSL loop
Via cable
Clean IP Switch orGigabit Ethernet cluster
Trunks to Internet
Trunks toPSTN
Trunks toSIP, H.323 net
Servers: RADIUS, SIP, H.323, Media, policy
A/D
A/D
M
M
A/D