Existing transmission networks are based on Plesiochronous Digital Hierarchy (PDH) as defined in ITU-T Rec.G.702. ATM is considered as the suitable technique to support B-ISDN. The Synchronous Digital Hierarchy (SDH) will form the basis of transport of the ATM cells.
ITU-T G.804 SPANISH-2004由国际电信联盟 IX-ITU 发布于 2004-06-01。
ITU-T G.804 SPANISH-2004 在中国标准分类中归属于: M14 通信网传输系统接口。
* 在 ITU-T G.804 SPANISH-2004 发布之后有更新,请注意新发布标准的变化。
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