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GB standards are the China national standards; Prefix code GB are Mandatory standards, GB/T are Recommended standards; All products or service must be compliance with GB standards; If you want to export products or services to huge Chinese market, need ensure they are meet the requirements of GB china national standards; We provide Chinese GB standards and English version GB standards Lookup, Translate, Download, Imported Commodity GB standards Testing and Compliance review services. |
| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 5443-1985 |
The test methods for the technical specifications of ringing and tone for automatic telephone switchingnetwork 电话自动交换网铃流和信号音技术指标测试方法 |
China National Standards phone |
 English PDF |
| 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 |
China National Standards phone |
English PDF |
| GB/T 3971.3-1983 |
The test methods for the technical specifications of multi-frequency register signalling for telephone auto-matic switching network 电话自动交换网多频记发器信号技术指标测试方法 |
China National Standards phone |
English PDF |
| GB 3971.2-1983 |
Interoffice junction digital line signalling system for telephone automatic switching network 电话自动交换网局间中继数字型线路信号方式 |
China National Standards phone |
English PDF |
| GB/T 3974-1983 |
Telephone transmission interference allowances for long-distance high-capacity analogue microwave communication systems 大容量长距离模拟微波通信干线电话传输干扰容限 |
China National Standards phone |
English PDF |
| GB 3380-1982 |
Ringing and tone for telephone automatic switching network 电话自动交换网铃流和信号音 |
China National Standards phone |
English PDF |
| GB 3378-1982 |
Subscriber line signalling system for telephone automatic switching network 电话自动交换网用户信号方式 |
China National Standards phone |
English PDF |
| GB 3377-1982 |
Multifrequency register signalling system for telephone automatic switching network 电话自动交换网多频记发器信号方式 |
China National Standards phone |
English PDF |
| GB 3376-1982 |
Inband pulsing single frequencyline signalling system for telephone automatic switching network 电话自动交换网带内单频脉冲线路信号方式 |
China National Standards phone |
English PDF |
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