s
IP Telephony
Helmut Schink
helmut.schink@icn.siemens.de
+49 89 722 44523
Siemens AG
ICN M CS 21
81359 München
Hofmannstr. 51
ITU Workshop on IP Telephony, Geneva, June 2000
1
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
2
s
Driver for tomorrow’s communication
Bitrate growth in data networks is higher
Total average bitrate
106
Gbit/s
103
Telephone total
1
10-3
Internet
10-6
1985
1990
1995
2000
2005
2010
Source: ICN M CM, ITU, ISOC
2015
Year
2020
ð The internet becom es a second universal network besides
the voice network.
ITU Workshop on IP Telephony, Geneva, June 2000
3
s
Driver for tomorrow’s communication
Voice stays the main revenue generator
Revenues*) in Billion DM
400
350
300
250
200
150
100
50
0
Voice over IP Market Share *)
406
334
10 %
29%
20%
5%
0
1993
Voice
7%
25%
244
1998
CATV
2003
Data & VAS
*) Revenue for Telecom Services in Western Europe
Source: ICN M CM
3%
< 1%
1998
2003
2005
*) VoIP global call minutes as percentage of
VoTDM global call minutes.
The Impact on Telco Services and
Revenues, OVUM Ltd. 1998
ð Voice service is lucrative for voice and data network
providers
ITU Workshop on IP Telephony, Geneva, June 2000
4
s
Driver for tomorrow’s communication
The competition will be decided on services and price
With New Services
n conquer new markets
n differentiate from competition
n generate additonal
revenues
Revenues p. Y. (in Bill. ECU) *
100%
90
13%
110
180
17%
30%
80%
280
Traditional Services
n offered by all providers
n increased price competition
45%
60%
40%
87%
83%
70%
55%
1990
1995
2000
2005
Services are the key to voice/data
success. They ...
n save tim e and money
n increase convenience for the end user
n generate additional call minutes
n are directly m arketable
n create direct revenues
n promote subscriber loyalty
n provide a competitive edge in
deregulated m arkets
20%
0
* Revenues in Europe
Source: ICN M CM
ð The key to voice/data success lies in advanced multimedia
services and applications
ITU Workshop on IP Telephony, Geneva, June 2000
5
s
Operators’ Motivation to Deploy VoIPServices
Operators’ Rating of Drivers for Voice over IP
average of all surveyed operators
Offering new and advanced services
very important
1
2
3
4
5
not important
6
Cost savings through efficiency of unified network
Cost savings through more bandwidth efficiency
VoIP as an additional, low-cost service
Market pull from business customers
Avoidance of interconnection cost
Growing competitive pressure through VoIP
Market pull from residential customers
Offloading peak traffic from the trad. voice n/w
Improved customer retention (for ISPs only)
Charge usage-based instead of flat rate (for
ISPs only)
ITU Workshop on IP Telephony, Geneva, June 2000
Interview basis: 16
6
s
Expected GW Features
Which features do operators expect ?
Connectivity
with PSTN
(multiple votes per operator possible)
15 answers total
SS7
Single-stage-dialing
ISUP transparency
Automatic Fax handling
IP QoS features
Automatic Modem handling
Automatic DTMF handling
Availability 99.999%
Line Redundancy
PSTN fallback incorporate in VoIP equipment
IVR (interactive voice response)
CO environmental conditions
CO rack integration (size)
Speech recognition (-> prepaid account)
CO power supply
Additional voice compression standards
0
4
8
12
Number of votes
needed now
ITU Workshop on IP Telephony, Geneva, June 2000
needed in 2 years
7
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
8
s
Decentralized Services
Access isolated in each
Administrative Domain
Access open across Administrative Domains
IP Phone
Gwy.
Gwy.
IP TelephonyLocation
Services IPTEL
IP Network
Trust Center
Services
PSTN / IN
IN
Services
Gatekeeper- /
TelephonyDomain Location
Services TIPHON
Small Enterprise
Tel. & IP Services
e.g. Vocaltec
ITU Workshop on IP Telephony, Geneva, June 2000
Management
Services
SNMP...
Clearing House
Billing
Services
9
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
10
s
Attraktive Internet Features
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)
ITU Workshop on IP Telephony, Geneva, June 2000
11
s
CCIB: Functional Principle
Internet
PSTN/ISDN
Switch
Core
InterNode
Forward
Set-up
VoIP call
IPOP
Server /
Router
Content
Provider
Modem /
VoIP Process
Switch
ITU Workshop on IP Telephony, Geneva, June 2000
12
s
WCC: Service
web
ISP
(User)
VoIP/CCIB
or
telephone
ISP
(Agent)
Web Call
Center
Webserver
(e.g. archive)
EWSD INTERNODE
switching system
•• WCC
WCCcontolls
contollsdatadata-and
andvoicevoice-connection
connection
ITU Workshop on IP Telephony, Geneva, June 2000
13
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
14
s
Gatekeeper Pricing Protocol: Overview
Gateway
Operator
A
1
ARQ
5 SETUP
Gateway
4
ACF
6
ARQ
7
ACF
Operator
B
IP Network
Gatekeeper
Gatekeeper
3
AuthRsp
2
AuthReq
Clearinghouse Service
ITU Workshop on IP Telephony, Geneva, June 2000
15
s
Management: Trust And Authentication Services
"Trust
"Trust by
by Wire"
Wire" to
to "Trust
"Trust by
by Authentication"
Authentication"
•• Trusted
Trusted authorities
authoritiesmust
must be
bedeployed
deployed
e.g.:
e.g.:Trust
Trustcenters
centersissue
issuesecurity
securitycertificates
certificates/ /tokens
tokens
•• Telco's
Telco's are
are traditionally
traditionally trusted
trusted
Operation
Operationof
oftrust
trustcenters
centersgenerates
generatesnew
new income
income(Verisign..)
(Verisign..)
•• None
Nonerepudiation
repudiationevidence
evidencegathering
gathering
Trust
Trustcenters
centerscan
canverify,
verify,trace
traceand
andstore
storeCLI
CLIinform
information
ationfor
for
later
proof.
This
is
currently
a
problem
in
IP
networks
later proof. This is currently a problem in IP networks
•• ......
ITU Workshop on IP Telephony, Geneva, June 2000
16
s
Telephone User Habits / Paradigms:
Do
Do users
users want
want anything
anything but
but dial?
dial?
•• Transparency
Transparencyfor
forToday’s
Today’sDevices
DevicesRequired?
Required?
e.g.:
e.g.:G.3
G.3FAX,
FAX,modem,
modem,look
lookand
andfeel,
feel,RJ11
RJ11plug
plug
•• Real-time
Real-timeBilling
Billing
e.g.:
e.g.:Coinboxes,
Coinboxes,Prepaid-Cards,
Prepaid-Cards,and
andhotel
hotelbilling
billing
•• Connection
ConnectionSetup
SetupTim
Timee
IsIslocation
locationfinding
findingfast
fastenough?
enough?
•• Call
Call Blocking
Blocking (Non
(NonPayment,
Payment,3rd
3rdParty
Party ...)
...)
What
Whatare
arethe
therequirements
requirementsthat
thatcan
cannot
notbe
behandled?
handled?
•• ......
ITU Workshop on IP Telephony, Geneva, June 2000
17
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
18
s
ITU-T
ITU-TSG
SG16
16concentrates
concentrateson
onMultimedia
MultimediaTerminals
Terminalsand
and
Security;
develops
IP
Telephony
Standard
H.323;
TIPHON
Security;
develops
IP
Telephony
Standard
H.323;
TIPHON
International
Standardization
provides
(www.itu.org)
Telecomm. Union
providesinput
inputfor
forthis
thisgroup.
group.
(www.itu.org)
Internet Engineering
Task Force
IETF
IETFinvestigates
investigatesinterworking
interworkingbetween
betweenInternet
Internetand
and
Intelligent
IntelligentNetworks.
Networks.TIPHON
TIPHONinfluences
influencesvia
viamember
member
organizations.
(www.ietf.org)
organizations.
(www.ietf.org)
TIPHON/ETSI
TIPHON/ETSIisisglobally
globallyaccepted
acceptedas
asleading
leadingbody
bodyfor
for
internet
gateway
standardization.
(www.etsi.org/tiphon)
internet gateway standardization.
(www.etsi.org/tiphon)
TIPHON
ITU Workshop on IP Telephony, Geneva, June 2000
19
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
20
s
Siemens evolutionary strategy for carriers
From EWSD to SURPASS with an open architecture
SURPASS hiQ
proprietary i/fs
RAS
•• Voice
Voice Features
Features
•• Call
Call Control
Control
•• Access
Access
VoIP
EWSD
CO
SURPASS
hiG 1000
VoATM
SURPASS
hiG 2000
Access
Access
SURPASS hiA
EWSD
Siemens’
Siemens’ leverage:
leverage: the
the large
large installed
installed base
base and
and best
best in
in class
class voice
voice features.
features.
Market
Market requires:
requires: Open
Open interfaces
interfaces and
and decoupling
decoupling of
of control
control and
and transport.
transport.
ITU Workshop on IP Telephony, Geneva, June 2000
21
s
SURPASS hiQOpen Platform with standard interfaces
Open API for external Applications
SCP
IN
Open API for
external applications
SS7
Gatekeeper
Gatekeeper and
Registration
Routing Server
Signalling
Gatew ay
SS7
Signalling
Gateway
M edia
Gateway
Controller
H.323
Signalling
Gateway
H.323
M edia Node
STP
STP
PSTN / ISDN
P
SU
7I
SS
Switch
US
DI
RA
H.323
Call & Feature Server
CP
MG
H.323
Endpoint
SS
7I
SU
P
H.323
Op en
A PI
Rad ius
(AAA)
MG
CP
P
NA
7I
SS
SURPASS hiQ
open platform
RADIUS Server
Data Network
GW
ITU Workshop on IP Telephony, Geneva, June 2000
H.323
Endpoint
SS7
Switch
PSTN / ISDN
GW
22
s
Multiservice Access – SURPASS hiA
SCP
LNP
Call Feature Server,
Media Gateway Controller
INAP
IN
Network
Servers
AAA Server, Reg. & Routing Server
Open API
SoHo residential
RAS
TDM
PSTN/ISDN
network
other carrier
VoIP
VoATM
Access
IP / ATM
backbone
Edge
Router
Switch
Switch
Switch
xDSL
POTS/ISDN
subscriber
Core Router
ATM, FR/LL
PBX
Gateway
POTS/ISDN
subscriber
SURPASS hiA
SM/L Enterprise
ITU Workshop on IP Telephony, Geneva, June 2000
23
s
Siemens Corporate GSM Solution
BSC
GSM Public Operator
Abis
OMC-B
BTS
MSC
BTS
MCU
Abis
WARP
Router
Pico BTS
Server
QoS LAN
WAN
E+G If
MSC
Gateway
GPRS
Gateway
Corporate
IP network
H.323
Terminal
OAM
OAM
Gateway
Server
H.323 / GSM
Gatekeeper e.g. Voicemail,
PBX
Gateway
SGSN
HLR
Internet
Firewall
PBX
Network
PSTN
ISDN
ISDN PRA
Directory
ITU Workshop on IP Telephony, Geneva, June 2000
24
s
Content
1) Drivers
2) Principles
3) Application
4) Challenges
5) Standards
6) Current Product
7) Closing
ITU Workshop on IP Telephony, Geneva, June 2000
25
s
Visions: Is IP switching the solution for voice?
A/D
PSTN
A/D
xDSL loop
Via cable
Trunks to
Internet
IPTel
Gwy
Trunks to
PSTN
IP
Router
Trunks to
SIP, H.323 net
Cable
Head
A/D
M
IP
Router
xDSL
A/D
M
Servers: RADIUS, SIP, H.323,
Media, policy
Modems
Analog loop
Clean IP Switch or
Gigabit Ethernet cluster
ITU Workshop on IP Telephony, Geneva, June 2000
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