Transcript Remote Office/Branch Office IP Telephony Solutions

Remote Office/Branch Office
IP Telephony Solutions
Sean Kent – Director Architecture/Technology
[email protected]
© 2004, SS8 Networks, Inc.
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Communication Needs
• Basic
– Secure Internet access to corporate Intranet
– Voice services
• Advanced
– Mobile voice services
– Mobile Internet access
– Contact Management
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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
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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
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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 Voice Services
(Roaming, …)
Unified Messaging,
Find-Me, Follow-Me
Public Mobile
Network
IP Network
(Internet)
Mobile Phone
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PDA
Desktop
Local and Long
Distance Voice
Services
Public Telephone
Network
Services
Networks
Office Phone
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Unified Communications (Today)
• Network convergence
• Device consolidation
Web Services (Email,
IM, Presence, …)
Mobile Voice Services
(Roaming, …)
Corporate Data
Services (Email, …)
IP Voice Services
(Flat-rate PSTN
access, …)
Services
Transport
IP Network (Internet)
Public Mobile Network
GSM
GPRS
Smartphone (Cell Phone/PDA)
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Wi-Fi
Laptop
DSL
Access
Office Phone (VoIP Phone)
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What’s Next
• Wi-Fi Access (SoftPhone VoWLAN)
– Access to flat-rate calling & bundled features
– Least-cost-routing, factors incl. cost, QoS, and coverage
Mobile Voice Services
(Roaming, …)
Public Mobile
Network
GSM
Corporate Data
Services (Email, …)
Web Services (Email,
IM, Presence, …)
Public Data
Network
GPRS
IP Voice Services
(Flat-rate PSTN
access, …)
Wi-Fi
Smartphone (Cell Phone/PDA)
• Mobile Internet (Email, Web, …)
• Mobile Voice Services (Cellular and VoWLAN)
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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
Conferencing
Voicemail
Storage
Application
Ethernet
Ethernet
Ethernet
Application
Database/Directory
Database/Directory
Database/Directory
Storage
IVR
Storage
Application
Call Control
Call Control
Call Control
Media Processing
Media Processing
Media Processing
Access Network
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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
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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
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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
Service Logic
Network-Hosted Services
Voicemail
Conferencing
IP Centrex
Signaling (ISUP, PRI, SIP, H.323, …)
Access Technologies
(DSL, Cable, Wi-Fi, CDMA, GSM, GPRS, …)
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Network
Resources
Mail Servers, Web Servers, Media Servers, ...
IVR
Application
Layer
Call Control
Layer
Access
Networks
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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
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Example
Storage, Databases, Directories, …
Data
Centers
Application
(Service Logic)
Application
(Service Logic)
IP
Backbone
Region 1
Region 3
Region 2
Call Control
IP
Backbone
c
Media Server Media Server Media Server
Access Access Access
POP
POP
POP
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IP
Backbone
Call Control
SS7/SMDI
Call Control
IP
Backbone
Media Server Media Server Media Server Media Server
Access Access
POP
POP
Access Access
POP
POP
IP
Backbone
Media Server Media Server
Access
POP
Access
POP
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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”
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Thank You
© 2004, SS8 Networks, Inc.