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Q.500 : Digital local, combined, transit and international exchanges - Introduction and field of application

Recommendation Q.500 (11/88)

Approved in 1988-11

Status : In force

Replaces Q.501 (1984) and Q.511 (1984)


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PDF Document PDF (acrobat)

58837 bytes 1990-01-04 E 12625 
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PDF Document PDF (acrobat)

62466 bytes 1990-01-04 S 12625 
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PDF Document PDF (acrobat)

63949 bytes 1990-01-04 F 12625 

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Word Document Word

40019 bytes 1990-01-04 E 12625  Download Download
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Word Document Word

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