This Recommendation gives functional characteristics of interfaces associated with: - network nodes, in particular, synchronous digital multiplex equipment and digital exchanges in IDNs for telephony and ISDNs; and - PCM multiplexing equipment. Clause 2 deals with basic frame structures, including details of frame length, frame alignment signals, Cyclic Redundancy Check (CRC) procedures and other basic information. Clauses 3 to 6 contain more specific information about how certain channels at 64 kbit/s and at other bit rates are accommodated within the basic frame structures described in clause 2.                          
                          
                          
                            
                                
                                    
                                        Số hiệu tiêu chuẩn
                                        ITU-T G.704
                                     
                                    
                                        Tên tiêu chuẩn
                                        Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44736 kbit/s hierarchical levels
                                     
                                                                        
                                        Ngày phát hành
                                        1998-10-00
                                     
                                                                        
                                    
                                    
                                    
                                    
                                    
                                    
                                        Từ khóa
                                        Data transfer * Digital signals * Frame structures * Network interconnection * Synchronous transmission * Telecommunication * Telecommunications * Transmission systems