Telecommunication service with simple words is a group of independent functions, which are an integral part of one or more business processes and composition of quantitative and qualitative parameters of technical and information resources, and communications facilities.
Subscriber, user or customer sees all of these components as a unified unit and used in accordance with their subscription to the expected value. God example of telco services are, voice, sms, msm. Service provider services to develop sales in the Product Master or Product Catalog. The same service can be turned into different products, packet differently, with different specific rates and charges, and so on.
There are different variants of services, but some of them are divided here:
The service is facing the user (customer-facing service) According to TMF, is one of the services that the consumer (consumer) services (the user (customer) first noticed, as opposed to “service faces to the network” (network-facing service).
It has further significance in relation to the different systems, because operatorovih automate various aspects of operational processes (Operations Processes).
Also very important is compatibility between billing systems, main switch and all network elements. For example it is very hard to start with share tariffs on Single e View or with ADSL on BSCS or with MMS on Sergel billing.