NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 7621-1987
1200 bits per second duplex modem standardized for use in the general switched telephone network and on point-to-point 2-wire leased telephonecircuits 在电话自动交换网和点对点二线租用电话型电路上使用的标准化的1200比特/秒双工调制解调器
Issued Date:1987-04-03
Implemented Date:1987-11-01
Issued by:
The Standardization Administration of the People's Republic of China
Order Process Chart
Free sign up a member account, Log in the Member Center.
Lookup
the Standards you want to order.
Add
Standards in Shopping Cart, you can add or delete standards
in the Shopping Cart before you submit the Price Inquiry
We will calculate the amount of words
of these standards in your cart, give you quotation within 1~2 work day.
Before Check out, you can delete the
Standards you don't want to
buy, then make the payment.
Waiting for our translation, the time is depend on the Standards pages, usually need 1-2 week (about 5~10 pages per day).
Download Standards PDF Files in this system or Sent to your email