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ITU-T E.157 (11/2009)

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International calling party number delivery
Recommendation ITU-T E.157 provides guidance for international calling party number delivery which is technology neutral. It also clarifies the relationship between calling party number delivery and number identification supplementary service. International calling party number delivery refers to calling party number delivery across boundaries of countries.
Citation: https://handle.itu.int/11.1002/1000/5636
Series title: E series: Overall network operation, telephone service, service operation and human factors
  E.100-E.229: International operation
  E.140-E.159: Operation of international telephone services
Approval date: 2009-11-24
Provisional name:E.cpnd
Approval process:TAP
Status: Superseded
Maintenance responsibility: ITU-T Study Group 2
Further details: Patent statement(s)
Development history