GB/T 7620-1987

300 bits per second duplex modem standardized for use in the general switched telephone network

STANDARD published on 3.4.1987

English, Chinese -
electronic design (pdf) (214.80 USD)

The information about the standard:

Designation standards: GB/T 7620-1987
Publication date standards: 3.4.1987
Country: Chinese technical standard
Category: Technical standards GB