NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
YDJ 13-1988
市內電話網光纖數位傳輸系統工程設計暫行技術規定 Temporary technical regulations for engineering design of optical fiber digital transmission system of urban local telephone network
Issued Date:
Implemented Date:
Issued by:
The Standardization Administration of the People's Republic of China