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该系统是串接于电话局至用户之间的脉码调制线路复用设备。它由局端和远端两个不同的端机组成。端机之间只需2对市话用户电缆相联,即能提供10路语音通道和1路低速(小于9600波特)RS232数据接口通道,因此使网络容量得到扩充,这对用户线比较紧张传输质量要求较高的地区来说,其优越性更为突出。一、设备特征:由于采用PCM技术,因此抗干扰能力强,失真度小,传输质量高。每条话路均具有遥测功能,并可传递16kHz计费脉冲。数据通道可用来传输电报,或连接计算机远程终端,或省却两端MODEM及相应一对连线即可实现集中式立即计费。系统具有自动监测能力,遇有故障立即报警。远端机电源可实行远供。二、主要技术性能:1.标准比特率:704Kbit/s;2.传输码型:HDB_3;3.每时隙比特数:8;4.每帧时隙数:11;5.每复帧帧数:16;
The system is cascaded between the telephone office to the user pulse code modulation line multiplexing equipment. It consists of central office and remote two different end machines. Only two pairs of local user cables are connected between the terminals, that is, it can provide 10 channels of voice channels and 1 channel of low speed (less than 9600 baud) RS232 data interface channels, so that the network capacity is expanded, which is more tense to subscriber lines The higher the quality of the region, its superiority is more prominent. First, the equipment features: Due to the use of PCM technology, anti-interference ability, distortion is small, high-quality transmission. Each session has telemetry capabilities and can deliver 16kHz billing pulses. Data channels can be used to transmit telegrams, or connect computer remote terminals, or save both ends of the MODEM and a corresponding connection to achieve centralized billing immediately. The system has automatic monitoring capabilities, in case of failure immediately alarm. Remote power supply can be implemented far. Second, the main technical performance: 1. Standard bit rate: 704Kbit / s; 2. Transmission pattern: HDB_3; 3. The number of bits per slot: 8; 4. The number of slots per frame: 11; Number: 16