Post on 22-Mar-2020
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1ITU Workshop on IP Telephony, Geneva, June 2000
IP Telephony Helmut Schink
IP Telephony Helmut Schink
helmut.schink@icn.siemens.de+49 89 722 44523Siemens AGICN M CS 2181359 MünchenHofmannstr. 51
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2ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
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3ITU Workshop on IP Telephony, Geneva, June 2000
Driver for tomorrow’s communicationBitrate growth in data networks is higher
ð The internet becomes a second universal network besidesthe voice network.
ð The internet becomes a second universal network besidesthe voice network.
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
Source: ICN M CM, ITU, ISOC
Total average bitrate
Year1985
1
Gbit/s
1990 1995 2000 2005 2010 2015 2020
Telephone totalTelephone total
106
103
10-3
10-6
Internet
s
4ITU Workshop on IP Telephony, Geneva, June 2000
Driver for tomorrow’s communicationVoice stays the main revenue generator
ð Voice service is lucrative for voice and data networkproviders
ð Voice service is lucrative for voice and data networkproviders
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
0 < 1%
5 %
10 %
1998 2003 2005
3%
7%
< 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
29%
20%
25%
050
100150200250300350400
1993 1998 2003Data & VASCATVVoice
244
334
406Revenues*) in Billion DM
*) Revenue for Telecom Services in Western Europe Source: ICN M CM
29%
20%
25%
050
100150200250300350400
1993 1998 2003Data & VASCATVVoice
244
334
406Revenues*) in Billion DM
*) Revenue for Telecom Services in Western Europe Source: ICN M CM
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5ITU Workshop on IP Telephony, Geneva, June 2000
Driver for tomorrow’s communicationThe competition will be decided on services and price
With New Servicesn conquer new marketsn differentiate from competitionn generate additonal
revenuesTraditional Servicesn offered by all providersn increased price competition
ð The key to voice/data success lies in advanced multimediaservices and applications
ð The key to voice/data success lies in advanced multimediaservices and applications
Services are the key to voice/data success. They ...
n save time and money n increase convenience for the end user n generate additional call minutes n are directly marketablen create direct revenues n promote subscriber loyalty n provide a competitive edge in
deregulated markets
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
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6ITU Workshop on IP Telephony, Geneva, June 2000
Operators’ Motivation to Deploy VoIPServices
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
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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7ITU Workshop on IP Telephony, Geneva, June 2000
Expected GW FeaturesWhich 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
vity
wit
h P
ST
N
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
vity
wit
h P
ST
N
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8ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
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9ITU Workshop on IP Telephony, Geneva, June 2000
Decentralized Services
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
PSTN / INPSTN / IN
IP NetworkIP 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
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10ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
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11ITU 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
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12ITU Workshop on IP Telephony, Geneva, June 2000
CCIB: Functional Principle
IPOP
SwitchCore
Content Provider
PSTN/ISDN Internet
InterNode
Switch
Modem /VoIP -Process
Server /Router
Set-upVoIP call
Forward
IPOP
SwitchCore
Content Provider
PSTN/ISDN Internet
InterNode
Switch
Modem /VoIP -Process
Server /Router
Set-upVoIP call
Forward
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13ITU Workshop on IP Telephony, Geneva, June 2000
WCC: Service
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
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
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14ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
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15ITU Workshop on IP Telephony, Geneva, June 2000
Gatekeeper Pricing Protocol: Overview
IP Network
OperatorA Operator
B
1
Gateway Gateway
GatekeeperGatekeeper
Clearinghouse Service
ARQ
2AuthReq
3AuthRsp
5 SETUP
4ACF
6ARQ 7
ACF
IP Network
OperatorA Operator
B
1
Gateway Gateway
GatekeeperGatekeeper
Clearinghouse Service
ARQ
2AuthReq
3AuthRsp
5 SETUP
4ACF
6ARQ 7
ACF
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16ITU 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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17ITU 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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18ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
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19ITU 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 EngineeringTask Force
TIPHON
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. UnionInternational 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 EngineeringTask Force
TIPHON
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20ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
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21ITU Workshop on IP Telephony, Geneva, June 2000
Siemensevolutionary strategy for carriers From EWSD to SURPASS with an open architecture
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
VoATM
VoIP
EWSDCO
AccessAccess
EWSDCO
AccessAccess SURPASShiG 2000
SURPASShiG 1000
RAS
SU
RP
AS
S hiA
SURPASS hiQ
• Voice Features• Call Control• Access
• Voice Features• Call Control• Access
pro
pri
etar
yi/f
sEWSD
• Voice Features• Call Control• Access
• Voice Features• Call Control• Access
pro
pri
etar
yi/f
sEWSD
VoATM
VoIP
EWSDCO
AccessAccess SURPASShiG 2000
SURPASShiG 1000
RAS
SU
RP
AS
S hiA
SURPASS hiQ
VoATM
VoIP
EWSDCO
AccessAccess
EWSDCO
AccessAccess SURPASShiG 2000
SURPASShiG 1000
RAS
SU
RP
AS
S hiA
SURPASS hiQ
• Voice Features• Call Control• Access
• Voice Features• Call Control• Access
pro
pri
etar
yi/f
sEWSD
• Voice Features• Call Control• Access
• Voice Features• Call Control• Access
pro
pri
etar
yi/f
sEWSD
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22ITU Workshop on IP Telephony, Geneva, June 2000
SURPASS hiQOpen Platform with standard interfaces
SURPASS hiQopen platform
SCPIN
SS7Switch STP
PSTN / ISDN
SS7 I
SUP M
GCP
H.323
Data NetworkData Network
GW
SS7STP
PSTN / ISDN
Switch
MGCP
SS7 INAP
GW
RADIUS
Sig
nalli
ngG
atew
ay
H.323H.323
SS7 ISUP
Open API for external ApplicationsRADIUS Server
Gatekeeper
H.323Endpoint
H.323Endpoint
M edia Gateway
Controller
SS7 SignallingGateway
H.323SignallingGateway
Call & Feature Server
Rad ius(AAA)
Op en API Gatekeeper
Media Node
Open API forexternal applications
Registration andRouting Server
SURPASS hiQopen platform
SCPIN
SS7Switch STP
PSTN / ISDN
SS7 I
SUP M
GCP
H.323
Data NetworkData Network
GW
SS7STP
PSTN / ISDN
Switch
MGCP
SS7 INAP
GW
RADIUS
Sig
nalli
ngG
atew
ay
H.323H.323
SS7 ISUP
Open API for external ApplicationsRADIUS Server
Gatekeeper
H.323Endpoint
H.323Endpoint
M edia Gateway
Controller
SS7 SignallingGateway
H.323SignallingGateway
Call & Feature Server
Rad ius(AAA)
Op en API Gatekeeper
Media Node
Open API forexternal applications
Registration andRouting Server
SCPIN
SS7Switch STP
PSTN / ISDN
SS7 I
SUP M
GCP
H.323
Data NetworkData Network
GW
SS7STP
PSTN / ISDN
Switch
MGCP
SS7 INAP
GW
RADIUS
Sig
nalli
ngG
atew
ay
H.323H.323
SS7 ISUP
Open API for external ApplicationsRADIUS Server
Gatekeeper
H.323Endpoint
H.323Endpoint
M edia Gateway
Controller
SS7 SignallingGateway
H.323SignallingGateway
Call & Feature Server
Rad ius(AAA)
Op en API Gatekeeper
Media Node
Open API forexternal applications
Open API forexternal applications
Registration andRouting Server
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23ITU 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
SURPASS hiA
xDSLTDM
RAS
VoATM
VoIP
Gateway
RAS
VoATM
VoIP
Gateway
IP / ATM backbone
Core Router
EdgeRouter
IP / ATM backbone
Core Router
EdgeRouter
IP / ATM backbone
Core Router
EdgeRouter
PBXPBXPBX
SM/L Enterprise
Access
ATM, FR/LL
SoHo residential
POTS/ISDNsubscriber
SCPLNP
INSCP
LNP
IN INAPCall Feature Server,
Media Gateway Controller
Open API
PSTN/ISDNnetwork
other carrier
SwitchSwitch
Switch
POTS/ISDNsubscriber
PSTN/ISDNnetwork
other carrier
SwitchSwitch
Switch
SwitchSwitchSwitchSwitch
SwitchSwitch
POTS/ISDNsubscriber
NetworkServers
AAA Server, Reg. & Routing Server
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24ITU Workshop on IP Telephony, Geneva, June 2000
SiemensCorporate 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.323Terminal
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.323Terminal
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25ITU Workshop on IP Telephony, Geneva, June 2000
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
s
26ITU Workshop on IP Telephony, Geneva, June 2000
Visions: Is IP switching the solution for voice?
PSTN
IPRouter
IPTelGwy
IPRouter
Mo
dem
sxD
SL
Cab
le
Hea
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
PSTN
IPRouter
IPTelGwy
IPRouter
Mo
dem
sM
od
ems
xDS
LxD
SL
Cab
le
Hea
dC
able
H
ead
A/DA/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
MM
MM
A/D