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� Home : ITU-T : Publications : Recommendations : E�Series : E.131 : E.131 (11/88)
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E.131�:�Subscriber control procedures for supplementary telephone services �

Recommendation E.131 (11/88)

Approved in 1988-11-25

Status : In force

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Format Size Posted Article Number
English

PDF Document PDF (acrobat)

75113 bytes 1989-01-24 E�14836�
Espa�ol

PDF Document PDF (acrobat)

85062 bytes 1989-01-24 S�14836�
Fran�ais

PDF Document PDF (acrobat)

91666 bytes 1989-01-24 F�14836�

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Format Size Posted Article Number TIES users
English

Word Document Word

55682 bytes 1989-01-24 E�14836� Download
Espa�ol

Word Document Word

67339 bytes 1989-01-24 S�14836� Download
Fran�ais

Word Document Word

68161 bytes 1989-01-24 F�14836� Download

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