Standard No.:	GB 3971.2-1983
English Name:	Interoffice junction digital line signalling system for telephone automatic switching network
Chinese Name:	电话自动交换网局间中继数字型线路信号方式
Chinese Classification:	M12    Communication network number, signal and connection
Professional Classification:	GB    National Standard
ICS Classification:	33.040.30 33.040.30    Switching and signalling systems 33.040.30
Issued by:	NBS
Issued on:	1983-12-15
Implemented on:	1984-10-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	150.00
Delivery:	via email in 1~3 business day

数字型线路信号方式是在电话交换网局间中断采用PCM系统时的线路信号方式。本标准规定我国电话网中纵横制市话局(包括准电子局)，程控市话局和自动长话局之间数字型线路信号编码，接口中继方式以及信号设备的相关技术指标。