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: E Series
: E.721 |
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E.721 : Network grade of service parameters and target values for circuit-switched services in the evolving ISDN
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In force components |
Number
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Title |
Status |
E.721 (05/99) |
Network grade of service parameters and target values for circuit-switched services in the evolving ISDN
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In force
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Superseded and Withdrawn components |
Number
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Title |
Status |
E.721 (11/88) |
Network grade of service parameters in ISDN
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Superseded
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E.721 (08/91) |
Network grade of service parameters and target values for circuit-switched services in the evolving ISDN
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Superseded
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