RECOMMENDATION ITU-R S.1149-1 … NETWORK ARCHITECTURE AND EQUIPMENT FUNCTIONAL ASPECTS OF DIGITAL SATELLITE ... 1 Introduction 1.1 Scope 1.2 Abbreviations 1.3 Definition of satellite specific terms 2 SDH transport network description 2.1 SDH multiplexing techniques 2.2 SDH layered network modelling 3 Applications of FSS in SDH transport networks 3.1 Service aspects 3.2 Network management aspects 3.3 FSS system operational aspects 4 FSS-SDH network scenarios, modelling and description 4.1 Digital sections (scenario 1) 4.2 Wide-area single-rate cross-connect (scenario 2) 4.3 Wide-area multi-rate cross-connect (scenario 3) 5 FSS-SDH synchronous baseband equipment 5.1 SBE for SDH digital section (scenario 1) 5.2 SBE for wide-area single-rate cross-connect (scenario 2) 5.3 SBE for wide-area multi-rate cross-connect (scenario 3) ANNEX 1 … SSOH DCC serial channel protocol 1 The serial channel protocol 1.1 Physical layer 1.2 Special SSCF for SDH transport systems 2 Multipoint operation 3 Message structure for the serial channel 3.1 Presentation standard 3.2 Message structures