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ITU-T E.123 (02/2001)

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该建议书标题尚未译为中文。
该建议书标题尚未译为中文。
Citation: https://handle.itu.int/11.1002/1000/5341
Series title: E series: Overall network operation, telephone service, service operation and human factors
  E.100-E.229: International operation
  E.120-E.139: General provisions concerning users
Approval date: 2001-02-02
Approval process:TAP
Status: In force
Maintenance responsibility: ITU-T Study Group 16
Further details: Patent statement(s)
Development history