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F.721 : Videotelephony teleservice for ISDN

Recommendation F.721

In force components
Title Status
F.721 (08/92)
Videotelephony teleservice for ISDN   In force
Superseded and Withdrawn components
Title Status
F.721 (11/88)
Basic narrow band videophone service in the ISDN   Superseded


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Updated : 2007/10/03