Nokia TMR880的AT指令集。介绍了适用于接入TETRA系统的车载移动终端TMR880的AT指令接口，是利用TMR880做TETRA二次开发的必备资料。-the AT command set. Introduced in TETRA System Access Mobile Terminal TMR880 the AT command interface, TMR880 do is to use TETRA secondary development of the requisite information.