Pune, India, 13 – 15 December 2010

ITU-T Kaleidoscope 2010Beyond the Internet? - Innovations for

future networks and services

Ivan Gaboli, Virgilio PugliaItaltel SpA

Ivan.Gaboli@ italtel.it Virgilio.Puglia@italtel.it

SIP Trunking The route to the new VoIP

Services

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 2

SIP Business Trunking Architectural ModelClass 5

Softswitch

Network Border Elements

IP-PBX

IP-PBX

Very Large Enterprise Medium/Large Enterprise

Public Domain

Private Domain

NGN

ISUP

Media

PSTN/PLMN

SIP-I

SIP

CN

IP-PBX

Customer Border Elements

AS

Customer Border Elements

ASAS

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 3

Network Elements

Public DomainApplications ServersClass 5 SoftswitchMedia GatewaysNetwork Border Element

Private DomainCorporate Border ElementCorporate Switching NodeApplication serversIP PBXs

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 4

New world of servicesMobile Enterprise

Mobile officeUser ubiquityAny-Device, Any-Time, Any-Where

Unified communication & collaborationUnified messagingTelepresenceDocument sharingVirtual meeting rooms

Web 2.0Social Media NetworksPresence FederationCo-opetition & Mass creativity

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 5

Innovation Fields

Security Secured channelsData confidentialityNetwork reliability

GovernanceSimplified network managementManaged servicesEasy customizationHigh performanceUser autonomy (Self-Care portals)

SustainabilityVirtualizationEcology

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 6

Basic Call Setup Flow

CSN MGW BE SSW-C5

Ringing (180)

SETUP

Answer

RTP (Ring Back Tone)

RTP

IPPBX

INVITE (no SDP)

Answer (200 OK)

RTP RTP

RTPRTP

IP PhonePhone Control

Private Domain Public Domain

SIP H.248 ISUPSIPSIPICTCustom CSN

BE PSTN

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 7

SIP Business Trunking – Signaling Model

ISDN LikeSignaling is decoupled by IP-PBX and Media is anchored by the IP-PBX using a Media Termination Function to emulate a PBX behaviour

Pure SIPSignaling goes peer-to-peer between IP-PBXs

HierarchicSignaling between IP-PBXs is manipulated by a centralized harmonization function (HF) that can also anchor the media

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 8

SIP Business Trunking – Signaling Model

Class 5Softswitch

IP-PBX IP-PBX IP-PBX IP-PBX

MTP

Class 5Softswitch

IP-PBX IP-PBX

HF

ISDN-Like Pure SIP Hierarchic

Class 5Softswitch

MTP

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 9

SIP Business Trunking - User Plane Models

Fixed Media RTP is anchored by IP-PBXThe core network it is not affected by media changing related to services invocation IP-PBX needs a Media Termination Function to perform media anchoration

Variable Media RTP is peer-to-peerThe core network must manage all the RTP negotiatons due to user services invocationIP-PBX can implement various type of services and use several types of codecs

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 10

Pure SIP Model – Service invocation

RTP (Voice)

SSW SBCTrunkingGateway

INVITE – 200 OK

RTP

Hold / Media Channel Renegotiation

RTP (Musid on Hole)

Call Transfer (REFER)

SBCIP-PBXIP Phone IP-PBX IP-Phone

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 11

Go to market approach

Full JacketPre-packaged solutionLow customizationHigh reusability

Customer TailoredHigh customer requirements compliancyHigh customization possibilityHigh costs for deployment and certification

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 12

Services Enabler Features To implement New Services the network must leverage the

following capabilities:

Identity management & certificationVoice-Video codec/rating adaptationSignaling harmonizationSecurity & Encryption capabilitiesManagement of specific peculiaritiesAccounting capabilities

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 13

Services Enabler Device

IDAD Inter-Domain Adaptation Device Interdomain features harmonizationSignaling decoupling & normalizationMedia AnchoringDynamic Audio/Video transcoding/TransratingSession Admission ControlFax adaptationDTMF interworkingEncryption termination

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 14

IDAD Media Anchoring

Class 5Softswitch

BE BE

BE

IP-PBX IP-PBX

Enterprise A Enterprise B

Class 5Softswitch

BE BE

BE

IP-PBX IP-PBX

Enterprise A Enterprise B

No Media Anchoring Media Anchoring

IDAD

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 15

Interdomain features harmonization

IP Phone B

200 OK

RTP IP Phone B

INVITE

SSWSBC

200 OK

TrunkingGateway

HOLD

INVITE

RTP

RTP IP Phone

RTP Hold Tone

RTP Trunking Gateway

TRANSFER

RTP Hold Tone

IP-PBX SBCIP Phone IP-PBX

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 16

Network Semplification A measure of complexity can be assessed in proportion to the possible combination of all the devices involved.

When a new domain is added, the complexity with IDAD is significantly minor than without:

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 17

SIP Business Trunk BenefitsFast provisioningHigh performance & reliabilityGovernance Cost savings

Replacement of local telephone connections with VoIP gatewaysReduction in IT operating costs

GrowthMore efficient communications platformsImproved servicesSmart migrationAcceleration of communications processes for greater efficencySupport for community and semi-formal teams

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 18

Lesson learnedFacts

SIP Trunking will permit creation of new services for VoIP business marketStandardization facilitates interoperabilityManufacturers extend standards with proprietary customization to provide new services

IDAD is the trade-off between time to market and standardization.

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 19

Back Up Slide

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 20

Basic Call Setup Flow

CSN BE MGW BE SSW-C5

8. ACM

11. 180 ringing(g729, sendrcv)

20. 200 OK (g729)

9. CRCX

(g711, g729, T.38)10. OK (g729)

7. IAM

15. ANM

RTP (Ring Back Tone)

RTP

IPPBX

ICT

2. 100 Trying

1. INVITE (no SDP)

4. 100 Trying

3. INVITE (no SDP)

6. 100 Trying

5. INVITE (no SDP)

12. 180 ringing(g729, sendrcv)13. 180 ringing

(g729, sendrcv)

21. 200 OK (g729)

22. 200 OK (g729)

14. PRACK(g729) 15. PRACK

(g729) 16. PRACK(g729)

17. 200 OK18. 200 OK

19. 200 OK

23. ACK (g729)24. ACK (g729)

25. ACK (g729)

RTP RTP

RTPRTP

IP PhoneSkinny

Skinny

Skinny

ICT

ICT

ICT

Private Domain Public Domain

PSTN

SIP H.248 ISUPSIPSIPICTCustom CSN

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 21

Pure SIP Model – Service invocation

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 22

Hierarchic Model - Service Invocation

Pune, India, 13 – 15 Dec 2010: ITU-T Kaleidoscope 2010 – Beyond the Internet? Innovations for future networks and services 23

ITU Standardization vs IDAD

The strengthening of the standards is the main way to go forward for multi-vendor interoperable solutions, but it’s a must also consider the presence of several small/medium players that perform customization to provide services.

IDAD is the trade-off between time to market and standardization.