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May 20, 2009 - students, Nigeria Research Council, Nigeria Institute of Building (NIOB), Council of ... GMSC finds and interrogates HLR for roaming number and route the call according to the interrogation.

governments, builders, professional bodies and building team of ..... Atayero 2 3GSM & Mobile Computing: An Emerging Growth Engine for National Development, Covenant University, 2007 THE EDITORS • ADEREMI A. Home Location Register (HLR) - The HLR is the reference database for subscriber parameters.

DARAMOLA .................................................. 71 A PROCESS FRAMEWORK FOR SUBSCRIBER MANAGEMENT AND RETENTION IN NIGERIAN TELECOMMUNICATION INDUSTRY ....................................................... BSS consists of three (3) major hardware components: (i) The BSC has the digital control function of all BTSs.

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The SIM can be protected by use of Personal Identity Number (PIN) password, similar to bank/credit charge cards, to prevent unauthorized use of the card.

The BSC incorporates a digital switching matrix, which it uses to connect the radio channels on the air interface with the terrestrial circuits from the MSC.