NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 5442-1985
The test methods for the technical specifications of inband pulsing single frequency line signalling system for automatic telephone switching network 电话自动交换网带内单频脉冲线路信号技术指标测试方法
Issued Date:1985-10-30
Implemented Date:1986-06-01
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
Cart:
+86-755-25831330
