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E.550 : Grade-of-service and new performance criteria under failure conditions in international telephone exchanges

Recommendation E.550 (03/93)

Approved in 1993-03

Status : In force

 

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PDF Document PDF (acrobat)

99414 bytes 1994-09-19 E 5074 
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PDF Document PDF (acrobat)

108284 bytes 1994-09-19 S 5075 
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PDF Document PDF (acrobat)

118864 bytes 1994-09-19 F 5073 

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Word Document Word

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Updated : 2003/07/21