© 2004, SS8 Networks, Inc. Remote Office/Branch Office IP Telephony Solutions Sean Kent –...
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Transcript of © 2004, SS8 Networks, Inc. Remote Office/Branch Office IP Telephony Solutions Sean Kent –...
© 2004, SS8 Networks, Inc.
Remote Office/Branch Office IP Telephony Solutions
Sean Kent – Director Architecture/Technology [email protected]
V18
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
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
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
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 Phone Office PhoneDesktop
Networks
ServicesMobile 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
www.ss8.com 6 6
Unified Communications (Today)
• Network convergence
• Device consolidation
DSLGSM
Wi-FiGPRS
Smartphone (Cell Phone/PDA) Office Phone (VoIP Phone)Laptop
Access
Transport
ServicesCorporate 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, …)
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
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
Eth
ern
et
Database/Directory
Application
Storage
Conferencing
Media Processing
Call Control
Eth
ern
et
Database/Directory
Application
Storage
Voicemail
Access Network
Media Processing
Call Control
Eth
ern
et
Database/Directory
Application
Storage
IVR
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
www.ss8.com 10 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
www.ss8.com 11 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
Voicemail Conferencing IP Centrex IVR
Access Technologies(DSL, Cable, Wi-Fi, CDMA, GSM, GPRS,
…)
www.ss8.com 12 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
www.ss8.com 13 13
Example
c
IPBackbone
IPBackbone
AccessPOP
AccessPOP
AccessPOP
AccessPOP
AccessPOP
AccessPOP
AccessPOP
AccessPOP
AccessPOP
Media Server Media Server Media Server Media Server Media Server Media Server Media ServerMedia Server Media Server
IPBackbone
IPBackbone IP
Backbone
IPBackbone
Call Control Call Control Call ControlSS7/SMDI
Region 1 Region 2 Region 3
Data Centers
Application(Service Logic)
Application(Service Logic)
Storage, Databases, Directories, …
IPBackbone
IPBackbone IP
Backbone
IPBackbone
www.ss8.com 14 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”
© 2004, SS8 Networks, Inc.
Thank You