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Migrating 12.000 users to VoIP

Why??. University of Oslo (UoO) has a telephonysystem from 1992Northern Telecom Meridian 1, option 11, 51 and 71Expanded and upgraded, up to a pointCS1000M, rel 4.5, CS1000E rel 5.5A lot of the HW dates back to 1992And the technology is mid-80s... Or older...Difficult to do day to day operations20 individual PBXs, unable to move numbers between themExpansion is expensive and complexDifficult to implement new services20 individual PBXsNo APIs or other modern interfaces (just a CLI over9443

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Migrating 12.000 users to VoIP

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