标准号 | G.704 |
中文名称 | 用于1544、6312、2048、8448和44736kbit/s速率系列级的同步帧结构 |
英文名称 | Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels |
发布日期 | 1998-10-01 |
标准状态 | 现行有效; |
摘要 | This Recommendation gives functional characteristics of interfaces associated with: ?C network nodes, in particular, synchronous digital multiplex equipment and digital exchanges in IDNs for telephony and ISDNs; and ?C 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. 本建议给出了与下面设备相关的接口功能特性: -网络节点,特别是电话用的IDNs 和ISDNs中的同步数字复用设备和数字交换设备,以及 -PCM复用设备。 第2节涉及到基本桢结构,包括桢长,桢定位信号,循环冗余校核程序和其他基础资料的详细说明。 第3节到第6节包括与在第2节所述的基本桢结构内如何提供某些64 kbit/s 和其它比特率的信道有关的更专门的资料 这些接口设备的电气特性在建议G.703中作了规定。 |
页数 | 45 |
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