Standard No.:	GB/T 7557-1987
English Name:	General characteristics complying with the network performance objectives for 300 channel carrier telephone systems on standardized 1. 2/4. 4mm coaxial cable pairs
Chinese Name:	1.2/4.4mm标准同轴电缆300路载波系统进网特性要求
Chinese Classification:	L27
Professional Classification:	GB    National Standard
ICS Classification:	33.040.40 33.040.40    Data communication networks 33.040.40
Issued by:	SAC
Issued on:	1987-03-02
Implemented on:	1987-1-1
Status:	abolished
Abolished on:	2005-10-14
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	180.00
Delivery:	via email in 1~3 business day

本标准适用于长途通信网中的1.2/4.4mm标准同轴电缆300路载波系统，是制订设备标准、施工设计规范和维护规程的主要依据。本标准规定了系统进网时必须具备与统一的基本特性要求和接口特性要求。