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Upcoming period makes opportunities for electricity companies in Bosnia and Herzegovina for providing telecom services on liberalized telecom market. They investigate power line potential as communication access medium, for delivering broadband services to their customers. Power line characteristic, such as: frequency band, impedance mismatch, channel attenuation, noise and modulation techniques are discussed in this paper. The paper, also, presents the planned measurements that will be used for defining conditions for PLC implementation project in Bosnia and Herzegovina.

In order to succeed in the market, telecommunications companies are not competing solely on price. They have to expand their services based on their knowledge of customers' needs gained through the use of call detail records (CDR) and customer demographics. All the data should be stored together in the CDR data mart. The paper covers the topic of its design and development in detail and especially focuses on the conceptual/logical/physical trilogy. Some other design problems are also discussed. An important area is the problem involving time. This is why the implication of time in data warehousing is carefully considered. The CDR data mart provides the platform for Online Analytical Processing (OLAP) analysis. As it is presented in this paper, an OLAP system can help the telecommunications company to get better insight into its customers' behavior and improve its marketing campaigns and pricing strategies.

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