IR.30 GSM900 GSM1800 GSM1900 Roaming Interoperability v3.0.0

IR.30 GSM900 GSM1800 GSM1900 Roaming Interoperability v3.0.0 image

IR.30 describes the technical background, roaming scenarios, possible problems to be encountered and solutions that can be found when a GSM900-GSM1800 customer roams in a GSM1900 network and reverse. It also describes the practical solutions currently adopted and their possible co-existence.

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