GSM 08.51中给出了A-bis接口的使用和一般方面。本全球移动通信系统技术规范（GTS）为规范基站控制器（BSC）和基站收发信机（BTS）及其收发器（TRX）之间接口的其余规范提供了原则依据。这些组件一起构成基站系统（BSS）。（GSM 08.01至08.20中规定了MSC和BSS之间的接口。）该接口的目的是获得一种将远程定位的BTS/TRX连接到BSC的统一方式，允许不同制造商的BSC和BTS/TRX互连。为了使基站尽可能简单，基站只包含必须靠近无线电接口的功能。

The use and general aspects of the A-bis interface are given in GSM 08.51. This Global System for Mobile communications Technical Specification ( GTS) gives the principle basis for the rest of the specifications spec ifying the interface between the Base Station Controller (BSC), and th e Base Transceiver Station (BTS), with its transceivers (TRX). These c omponents together form the Base Station System (BSS). (The interface between MSC and the BSS is specified in GSM 08.01 to 08.20.) The intention with this interface is to get a unified way of connectin g remotely located BTSs/TRXs to a BSC allowing for the interconnection of BSCs and BTSs/TRXs from different manufacturers. In order to keep the BTS as simple as possible, BTS contains only thos e functions which have to reside close to the radio interface.