This is Huawei GTM900B module details! Including the then law and instruction set!

客户公开
........\GTM900 产品概述.pdf
........\华为GTM900 无线模块 AT命令手册.pdf
........\华为GTM900 无线模块 GPRS拨号 设置方法.pdf
........\华为GTM900 无线模块 STK命令用户 使用手册.pdf
........\华为GTM900 无线模块 串口多路复用 参考手册.pdf

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