Pune, India, 13 15 December 2010

I TU-T Kaleidoscope 2010Beyond the I nternet? - I nnovations for

future networks and services

I van Gaboli, Virgilio PugliaI taltel SpA

I van.Gaboli@ italtel.it Virgilio.Puglia@italtel.it

SI P Trunking The route to the new VoI P

Services

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

Notes

This presentation is derived from a paper accepted for presentation at the ITU-T " Beyond the Internet ? Innovations for future networks and services" Kaleidoscope 2010 Conference, Pune, India, http://itu-kaleidoscope.org/2010

The presentation and the article represent the opinion of the Authors and does not imply any endorsement of said opinion by the Organizer

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

SI P 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 4

Netw ork Elem ents

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 5

New w orld 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 6

I nnovat ion 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 7

Basic Call Setup Flow

CSN

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

SI P Business Trunking Signaling Model

ISDN LikeSignaling is decoupled by IP-PBX and Media isanchored by the IP-PBX using a MediaTermination Function to emulate a PBXbehaviour

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

HierarchicSignaling between IP-PBXs is manipulated by a centralized harm onizat ion funct ion (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 9

SI P 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 10

SI P Business Trunking - User Plane Models

Fixed Media RTP is anchored by IP-PBXThe core network it is not affected by mediachanging related to services invocationIP-PBX needs a Media Termination Function toperform 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 11

Pure SI P Model Service invocat ion

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

Go to m arket 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 13

Services Enabler Features

To im plem ent New Services the network m ust leverage the following capabilit ies:

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 14

Services Enabler Device

I DAD I nter-Dom ain Adaptat ion 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 15

I DAD 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 16

I nterdom ain features harm onizat ion

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

Netw ork Sem plificat ion A measure of complexity can be assessedin proportion to the possible combination ofall 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 18

SI P 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 19

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

I DAD is the t rade-off between t im e to m arketand standardizat ion.

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

Back Up Slide

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

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 22

Pure SI P Model Service invocat ion

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

Hierarchic Model - Service I nvocat ion

Pune, India, 13 15 Dec 2010: ITU-T Kaleidoscope 2010 Beyond the Internet? Innovations for future networks and services 24

I TU Standardizat ion vs I DAD

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.

I DAD is the t rade-off between t im e to m arket and standardizat ion.