1. © 2004, SS8 Networks, Inc. Remote Office/Branch Office IP Telephony Solutions Sean Kent – Director Architecture/Technology Sean.Kent@SS8.com V18

2. www.ss8.com 2 2 Communication Needs Basic –Secure Internet access to corporate Intranet – Voice services Advanced –Mobile voice services –Mobile Internet access –Contact Management

3. www.ss8.com 3 3 Inexpensive Voice Services Solution, a business decision –Remote IP-PBX station –IP Centrex Value propositions –Fixed cost, nationwide calling & bundled features –On-net toll bypass, selectable area codes –Personalization, flexible contact management for both business and social purposes –Mobility, physical access decoupled from services

4. www.ss8.com 4 4 Contact Management Prevents missed business opportunities Improves productivity & reduces telecom costs Find-Me/Follow-Me/Hide-Me –Intelligent call forwarding services Voicemail –Busy/No-Answer/Do Not Disturb Notification –Message Waiting Indictor –Cross notification, office voicemail -> mobile SMS –Visual voicemail, web portal or fwd to email account

5. www.ss8.com 5 5 Unified Communications (late-1990s) Lack of devices –SoftPhone, use of PC as telephone, low adoption rate Complicated service management –Ease of use scored poorly with market Mobile PhoneOffice Phone Desktop Networks Services Mobile Voice Services (Roaming, …) Public Mobile Network IP Network (Internet) PDA Unified Messaging, Find-Me, Follow-Me Public Telephone Network Local and Long Distance Voice Services

6. www.ss8.com 6 6 Unified Communications (Today) Network convergence Device consolidation DSLGSMWi-FiGPRS Smartphone (Cell Phone/PDA) Office Phone (VoIP Phone) Laptop Access Transport Services Corporate Data Services (Email, …) Mobile Voice Services (Roaming, …) IP Voice Services (Flat-rate PSTN access, …) Public Mobile Network IP Network (Internet) Web Services (Email, IM, Presence, …)

7. www.ss8.com 7 7 What’s Next Wi-Fi Access (SoftPhone VoWLAN) –Access to flat-rate calling & bundled features –Least-cost-routing, factors incl. cost, QoS, and coverage GSMWi-FiGPRS Smartphone (Cell Phone/PDA) Mobile Internet (Email, Web, …) Mobile Voice Services (Cellular and VoWLAN) Corporate Data Services (Email, …) Mobile Voice Services (Roaming, …) IP Voice Services (Flat-rate PSTN access, …) Web Services (Email, IM, Presence, …) Public Mobile Network Public Data Network

8. www.ss8.com 8 8 Problem: Access Dependent Apps Historically apps deployed as Service Islands –Closed vertically integrated systems –Access technology tightly coupled with application –Replicated resources, storage, databases, directories... –Overlapping user data, maintained by several apps Distributed or centralized deployment Media Processing Call Control Ethernet Database/Directory Application Storage Conferencing Media Processing Call Control Ethernet Database/Directory Application Storage Voicemail Access Network Media Processing Call Control Ethernet Database/Directory Application Storage IVR

9. www.ss8.com 9 9 Distribution: Positives and Negatives Distributed Model: Many services platforms distributed as close to the switch as possible –Benefits Low backhaul costs Network downtime effects only small numbers of subscribers –Drawbacks Very expensive to maintain Need to employ trained maintenance personnel in every geographic region System upgrades are very time consuming and costly – new software needed to be installed on hundreds of systems Provisioning costs very high

10. www.ss8.com 10 Centralization: Positives and Negatives Centralized Model: Large platforms handling multiple markets (extreme case: one nationwide platform at a central location) –Benefits Low maintenance costs – one set of operations personnel for the entire network Single point provisioning Single database –Drawbacks High backhaul costs Need for long-haul facilities from every access POP back to the hub

11. www.ss8.com 11 The New Ingredient: VoIP Access, Call Control, Application, and Network Resources decoupled, standard interfaces Normalize access protocols Applications share network resources Benefits: –Lower equipment costs –Lower operating costs –Enables best-of-breed Signaling (ISUP, PRI, SIP, H.323, …) Call Control Layer Access Networks Application Layer Service Logic Network Resources Mail Servers, Web Servers, Media Servers,... Network-Hosted Services VoicemailConferencingIP Centrex IVR Access Technologies (DSL, Cable, Wi-Fi, CDMA, GSM, GPRS, …)

12. www.ss8.com 12 The New Ingredient: VoIP Development of VoIP infrastructure will have huge impact on the centralization debate Even pure TDM networks can use VoIP components to reduce operating expenses Centralization AND distribution can be achieved at the same time Media processing is fully distributed Signaling is partially distributed Databases, directories and service logic is centralized

13. www.ss8.com 13 Example c IP Backbone IP Backbone Access POP Access POP Access POP Access POP Access POP Access POP Access POP Access POP Access POP Media Server IP Backbone IP Backbone IP Backbone IP Backbone Call Control SS7/SMDI Region 1 Region 2 Region 3 Data Centers Application (Service Logic) Application (Service Logic) Storage, Databases, Directories, … IP Backbone IP Backbone IP Backbone IP Backbone

14. www.ss8.com 14 Conclusions VoIP is important as an enabling technology normalizing the access infrastructure, decoupling access for applications Access independent applications enables carriers to meet todays opex cost reduction goals while also preparing for future IP rollouts Decoupled components reduce cost of operation and improved time to market Shared components rather than “black boxes”

15. © 2004, SS8 Networks, Inc. Thank You