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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| YD/T 1838.4-2008 |
Technical Requirements of Upper Layer (Layer3)Signaling for the CDMA-based Digital Trunking Mobile Communication System 基于cdma技术的数字集群系统接口技术要求——空中接口 第4部分：层3信令 |
China Telecommunication
Standards Technical Requirements Upper |
 English PDF |
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