ETSI - European Telecommunications Standards Institute
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PRETS 300 513-1993
Scope
This specification describes the network feature Operator Determined Barring (ODB). This allows the network operator or service provider to regulate@ by means of an exceptional procedure@ access by the subscribers to GSM services@ by the barring of certain categories of outgoing or incoming calls or of roaming. The purpose of this network feature is to be able to limit the service provider's financial exposure to new subscribers@ or to those who have not promptly paid their bills. It may only be applied to the service provider's own subscribers.
PRETS 300 513-1993 history
1993PRETS 300 513-1993 European Digital Cellular Telecommunications System (Phase 2); Operator Determined Barring (GSM 02.41)