30-06-2012, 12:22 PM
A brief overview of CDR based Billing System
Role of Billing system in Telecom Business :
In DoT era, the Billing was the last function in Telecom operations coming after Commercial System, Fault tracking and management system and Directory Enquiry system. New connections along with Shift and other such functions were dealt in Commercial system. This system maintained a database of existing customers for dealing with Shift, Transfer, Safe custody and other such requests from existing customers. The Fault tracking and management system specifically catered to the management of line faults and while doing so had to maintain another database on existing customers. The third system of Directory Enquiry was an important system for informing the customers about the name and address for a telephone in a fast changing landline environment. That was the period when landline network grew and was reshaped at a hectic pace. The Directory Enquiry system also needed to have its own structured database. The last but not the least was the Billing system. It was known to many just as Billing system though its other component of Accounting was also equally important. Its function was to bill the customers on their usage and collect payments. Obviously this system needed its own database.
Thus the four core Telecom operation systems separately maintained four different databases. A single event like a request for a new connection needed four update transactions at different times for updating the four systems. The usual error content in transactions and asynchronous updates resulted finally in accumulated mismatch of the four databases.
Apart from the mismatch, as the operation systems were not interlinked with each other, changing any procedure was cumbersome needing changes to be made separately in all the four systems. Furthermore, in the absence of a single view of all aspects of a customer, single point reliable customer service could not be given.
In time, realizing the importance of integrating the four systems, attempts were made to evolve to integrated systems like DotSoft that contained all the four operation systems integrated together.
With progress of time and opening up of telecom business, the Billing System gained importance. It became the core application system through which all other functionalities flowed. GSM mobile systems first brought in fully integrated end-to-end provisioning to billing systems. In the fiercely competitive market, the concept of introducing flexible schemes and plans for segments of customers was introduced. The seamlessly integrated new generation Billing and Customer Care systems for mobile operations catered to these latest market requirements.
Apart from integration, a very important aspect of these systems was the basis of Billing. In these new systems, billing was based on Call Detail Records (CDRs) for a customer accumulated over a period instead of call meters. A CDR contained details such as calling number, called number, time of call, duration of call etc. It didn’t contain the call charge. This made possible the flexible rating or charging a CDR according to where the call was made, when the call was made and by whom the call was made. Time dependent, destination dependent, plan dependent flexible charging became possible. In competitive telecom business arena this flexibility of charging gained crucial importance and all operators without exception, according to their capability adopted this new concept.
The incumbent operators were in the field of landline operations where growth slowed down all over the world and mobile market exploded. The mobile systems invariably brought in these new CDR based billing systems. The quality and maturity of these billing systems in many cases determined the success of a mobile operator. Some operators needed to change their ineffective CDR based billing system for a better system within only a few years. The CDR based Billing and Customer Care systems gained a central importance in mobile operations because of their capability to support flexible and quick introduction of new customer schemes and plans, quickly activate or deactivate a connection while updating all the relevant information of a customer and finally providing high quality Customer Care.
From meter based to CDR based systems :
The landline systems were supported by multiple information systems whereas the mobile systems brought in one single information system that supported the core operations including billing. This integration of the systems is the first important improvement over the earlier systems.
The landline systems billed their customers on the basis of metered usage. This was replaced in the new systems by CDR based billing. This is again a very significant improvement that was absolutely necessary for carrying out the business itself in the competitive environment. This is the second significant departure from the earlier approach.
As all the core functions got integrated, and complete flexibility in charging a customer was introduced by CDR based billing, a number of other function stacks were put on the basic four core operation functions making the system much more valuable for business and operations.
It became possible to profile the customers, track their usage and depending on the profiles and usages segment the customers for focused marketing of special products.
Through all available channels such as SMS, Internet, Mobile phone, Fax etc. in the modern environment, facilities were provided to capture customer requests and feedback in the system and offer him consistent and speedy services.
Valuable functions such as Customer Care, Revenue assurance, Campaign management for effective marketing were put on the core CDR based system to enhance its effectiveness. The system no longer remained only as a billing system, its support extended to most aspects of operation in a competitive business environment.
CDR based billing system in BSNL :
This system is envisaged for landline operations and consists mainly of the subsystems :
1. CRM : The CRM or Customer Relation Management module is the single interface to all the customer requests from all the channels such as SMS, Internet, IVRS, direct approach at the Customer Service Centre and so on. It will capture a customer request and through a predefined process for the specific request which can be a request for a new landline connection or shift or such others, pass on the request to systems such as provisioning system and finally to billing system.
A well-developed IVRS system backed up by Customer Service Associates will provide a consistent and timely customer care.
o Customer feedback will enrich customer profiling and will be used for designing Marketing Plan that will be supported by a functional module of Marketing Campaign Management, a part of CRM.
• Provisioning : The provisioning system will make use of the relevant inventories and will make the necessary changes in the network elements as per the specific provisioning requirement.
2. Fault tracking and management : This module will be integrated with the IVRS which is considered to be a part of CRM, and with Billing and other relevant systems for Fault management.
3. Directory enquiry : This module again will be integrated with the IVRS and other relevant modules.
4. Billing and accounting : This is the core module doing rating or charging of the CDRs and Billing. There are associated modules of Payment Management system and Accounting system to round off a powerful Billing and Accounting subsystem.
5. Revenue assurance : This system will take relevant data from various sources including Billing system to minimize revenue leakages.
6. Enterprise reporting : A powerful Enterprise Reporting subsystem will generate relevant reports for various sections of users of the system.
7. Mediation : The mediation servers are an array of servers that will sit between the Billing System and the Exchanges. These will collect CDRs from the Exchanges and hand these over to the Billing servers suitably.
The CDR project :
The network and operation :
Four zonal CDR billing data centers at Kolkata, Pune, Chandigarh and Hyderabad cover all the Circles of BSNL. The CDR billing thus is zonal similar to the zonal GSM billing.
Each data centre houses the Billing servers, the mediation servers for pulling the CDRs from the exchanges, the zonal IVRS, and other associated hardware and software.
In each Circle there are two networks, one for the Exchanges connected to the zonal data centre and the other the network of Customer Service Representative or CSR terminals (similar to CCNs in GSM) again connected to the zonal data centre.
Each main exchange is connected to a co-located router through two X.25 ports on the exchange side. CDRs will be pulled by the mediation servers through one of these ports. Provisioning commands will be pushed through the second port. The exchange routers are then aggregated through higher level routers providing dual alternate routes to the zonal data centre.
In the same way the CSR terminals are aggregated through dual alternate routes to the zonal data center. All the myriads of customer services such as requests for new connection, shift, billing adjustments and so on will be fulfilled through these CSR terminals located at Customer Service Centers and other suitable locations. Customers will usually come in person to these CSRs to get their service requests fulfilled.
Phases of implementation :
In the first phase, the project will be implemented in a few selected SSAs. These are designated as Proof of Concept or POC SSAs. After tuning the system in these POC SSAs, the system will then be replicated to the whole of BSNL.
Conclusion :
The implementation of CDR based Billing project will have a number of positive fallouts:
1. Standardization of systems and processes - Instead of varieties of systems all over BSNL, a single seamlessly integrated standard operation system will support all the operational activities providing the associated advantages. The overall quality of billing and payment accrual systems should improve.
2. High quality Customer Care - The seamless integration will make possible single point high quality customer care.
3. Paradigm change of CDR based billing - The shift from call meter base to CDR base will make possible flexible call dependent charging and customer segment based marketing schemes. In addition, this paradigm change in billing will make possible new mandatory TRAI functions such as Carrier selection.
4. Value added functionalities - The additional value added functionalities will make possible new powerful functionalities such as formal Revenue Assurance, formal improved CRM, Marketing Campaign Management and so on.
5. E-Stapling - Through a special mechanism of E-Stapling, charges of various BSNL services of one customer will be billed together.
6. Time to Market – The new convergent billing solution and a services layer built into the integration layer will facilitate the launch of new functionality and products faster into the market.
7. Process Efficiency – New Systems will incorporate Industry best practices that should significantly improve the process efficiency in some of the areas.