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ITU-T E.164/I.331/Q.11 bis (11/1988)

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Citation: https://handle.itu.int/11.1002/1000/415
Series title: E series: Overall network operation, telephone service, service operation and human factors
  E.100-E.229: International operation
  E.160-E.169: Numbering plan of the international telephone service
Approval date: 1988-11-25
Approval process:WTSA
Status: Superseded
Observation:This Recommendation is also included but not published in I series under alias number I.331
Maintenance responsibility: ITU-T Study Group 2
Further details: Patent statement(s)