本全球移动通信系统技术规范（GTS）定义了BSS-MSC接口物理层（第1层）的结构，用于支持业务信道。GSM 08.06中介绍了使用物理铺设机支持信号系统7号信号链路。物理层是OSI参考模型中的最低层，它支持在物理介质上传输比特流所需的所有功能。本技术规范仅考虑数字传输，模拟传输的使用是国家关注的问题。

This Global System for Mobile communications Technical Specification (GTS) defines the structure of the physical layer (layer 1) of the BSS- MSC interface for supporting traffic channels. Use of the physical lay er for supporting Signalling System No.7 signalling links is covered i n GSM 08.06. The physical layer is the lowest layer in the OSI Reference Model and it supports all functions required for transmission of bit streams on the physical medium. For this Technical Specification only digital transmission will be considered, the use of analogue transmission is a national concern.