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1 ITU 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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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

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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.

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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

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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