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In teletraffic engineering, the effective design of wireless networks providing voice and data services at hot spots is of great practical importance. This paper presents a model of such networks in terms of a BMAP/ PH/N retrial queue. Due to the batch occurrence and high correlation of the traffic, it is decisive to choose the correct Batch Markovian Arrival (BMAP) representation of the empirically observed streams of call requests. The numerical results show that there are great differencesdoi:10.1002/ett.1000 fatcat:tftmnoblzzghfcoq4lu5sgizp4