ATM cell mapping into plesiochronous digital hierarchy (PDH) SERIES G: TRANSMISSION SYSTEMS AND MEDIA DIGITAL SYSTEMS AND NETWORKS Digital networks General aspects Study Group 15
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.