| 标准号 | G.181 |
| 中文名称 | 用于数字传输链路上的1+1型恢复系统的特性 |
| 英文名称 | Characteristics of 1 + 1 type restoration systems for use on digital transmission links |
| 发布日期 | 1993-03-01 |
| 标准状态 | 现行有效; |
| 摘要 | This Recommendation specifies the characteristics of equipment for 1 + 1 type transmission restoration systems (protection link switching) for digital transmission links (see Recommendation G.701). The general arrangement of a system of this type is shown in Figure 1. It uses hybrid on the send side, splitting the input path into two output paths. On the receive side the two paths are supervised and are connected further by a switch automatically controlled by the received signals. The switch may additionally be operated manually or by some kind of remote procedure. The two transmission directions are handled independently. This Recommendation refers to the equipment labelled as H (hybrid) RSE (restoration switching equipment) and RSCE (restoration switching control equipment). This Recommendation does not cover the restoration systems fully embedded in transmission systems. The hierarchical level at interface T is 2048 kbit/s. 本建议规定了数字传输链路的1 + 1 型传输恢复系统设备的特征。该类型系统的一般安排如表1中所示。在发送侧使用混合线圈，把输入通道分成两个输出通道。在接收端这两条通道被接收信号自动控制的开关监视和进一步连接。这个开关又被某种遥控方法控制。这两种传输方向被单独处理。本建议涉及称为H (混合线圈) RSE（恢复倒换设备）和RSCE （恢复倒换控制设备）。 本建议不包括全部内含在传输系统中的恢复系统。接口T的系统是2048 kbit/s. |
| 页数 | 7 |
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