TELECOM LEGACY SYSTEM
- Altanai Bisht- [email protected] http://altanaitelecom.wordpress.com
Legacy Landscape
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Transmission•ATM/Frame relays primarily constitutes the legacy.•Moving towards IP/MPLS.
Access•Transformation from hardware specific POTS / PSTN / ISDN towards NGN and VOIP.
Core•Packet Switched NGN Soft Switches.•Reduced cost of SIP Trunks over ISDN trunks.
Service Delivery•Harmonized and uniform open standard based service delivery platforms over legacy Proprietary SDKs
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Domain Elements Characteristics Transformation Path
Transmission ATM / Frame Relay -Hardware Specific-High Expenses
-IP-MPLS
Access POTS / PSTN / ISDN-Hardware Specific-High Expenses-Low stability
-NGN-VOIP
Core Traditional Switches / ISDN
-High OPEX/CAPEX-Soft switch-SIP Trunking
Service Delivery Traditional IN switches -Hardware Centric -Based on Open Standards
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Current Telco networks Closed Telco NGN networks - Closed
Internet – open
Circuit switched technology ATM/IP based technology IP based technology
Intelligent network Less intelligent network Dumb network
Dumb terminal More intelligent terminal Intelligent terminal
User-user services centrallycontrolled by provider oftransport service
User-user services centrallycontrolled, with much greaterscope for third party services..
• User-user services run by usersthemselves. No service creation -services and applications runfrom edge.
Interconnection is service relatedand controlled
Interconnection may occur atvarious levels. Above the IPlevel it is likely to be servicerelated and controlled.
Interconnection is open and onlyat IP level.
Few/no third party services Few/no third party services Numerous third party services
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Soft Switch
Benefits of NGN Soft Switches over Legacy Switches
• Increase the granularity and power processing distribution of the Network–Low density interconnection–Signalling, Media and IN capabilities distributed or concentrated depending on carrier needs• One Network–Reduction planning and engineering time–Reduction maintenance and operation costs• Transport–Eliminate the need of internal E1 –Reduction bandwidth needed –Reduction maintenance and operation costs
•Circuit Switched
• Monolithic
•Proprietary
•Expensive
•Dependant
•Packet Switched
• Distributed
•Open Interfaces
•Scalable
•Vendor independent
• Convergence
Legacy Switch NGN Soft Switch
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Trunking
Benefits of SIP Trunking over ISDN Trunking
• Reduce Usage Costs: Upto 30% cost reduction through multi-modal communication capabilities of SIP Trunking enables.
• Trunk Aggregation: Centralize and eliminate redundant connections. Idle connections at one location to be used for calls at other locations which gives increased flexibility over traditional T1 PRI.
• Flexibility: Gives the flexibility to expand or contract the capacity of no. of connections required.• Improved quality: Keeps the communications on pure IP connections vs. T1 PRI connection, improving voice and
video quality and preserving features like HD audio.• Simplified Billing: Make it easy to get started and simplify monthly invoice review.
ISDN PRI SIP Trunking
Usage costs On a comparable basis, ISDN PRI service can be 2x the cost of SIP Trunking service.
Around two times less costly.
Aggregation of trunks and access
T-1 and ISDN PRI access arrangements require that trunks be purchased in bunches of 23 or 24. For each T-1 or ISDN PRI access connection, the customer has to rent a 1.544 Mbps dedicated line to the carrier’s serving point.
Centralize and eliminate redundant connections. Buy exact number of connections needed(no need to buy in increments of 24)Idle connections at one location to be used for calls at other locations. SIP Trunking services typically allow ports to be added or deleted quickly.
Free features Features like call transfer may cost $50 per trunk per month, making a SIP option far more advantageous.
SIP Trunking services often include services that charged for on ISDN PRI or T-1 services
Simplified billing and administration
Organizations spend considerable time and effort processing and auditing telephone bills, tracking usage, and setting up internal chargebacks.
Bundling options make it easy to get started and simplify monthly invoice review•Per User – Local and long distance service can be priced at a flat rate per user•Per Port – Priced like a flat-rate SIP port that is shared by a number of users
Key Highlights of NGN Service Layer• SDP playing as a Broker.• SOA and Open APIs pave the way to open and decentralized (distributed) SDPs.• SDP offered as the service of the cloud(SDPaaS).• Data enhanced SDP (e.g. via data mining capabilities).• Moving towards software centricity and low cost based SDPs.• Service Orchestration with Internet and legacy.• Fast and agile development and deployment of convergent services.• IMS providing the framework for underline network agnosticism across fixed and mobile.• Resource brokering for mediation.• RESTful interface and web application based integration.
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Service Delivery Layer
• Existence of multiple domain specific SDPs(Mobile, IPTV and legacy broadband services etc.)
• Function centric architecture
• Proprietary SDKs
• Legacy service delivery Inefficient an expensive.
• Harmonized and uniform service delivery layer.
• Open APIs for 3rd parties and social features.
• Data Centric service architecture
• Standard interface defined SDKs.
• Strategic differentiator for telecom providers through Multi-party business models for innovative services.
Legacy Service Layer NGN Service LayerGSM
PSTNInternet
TV
Back Office
Applications
Service DeliverySession ControlTransmissi
on
Terminals
VOIP
Presen
ce
Internet
TV
Back Office
Applications
Service DeliverySession ControlTransmi
ssion
Terminals
Thank you
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