GJB 699.6-1989
Automatic telephone switching network signaling mode ring current and signal tone (English Version)

Standard No.

GJB 699.6-1989

Language

Chinese, Available in English version

Release Date

1989

Published By

Military Standard of the People's Republic of China-General Armament Department

Latest

GJB 699.6-1989

GJB 699.6-1989 history

• 1989 GJB 699.6-1989 Automatic telephone switching network signaling mode ring current and signal tone