撥碼開(kāi)關(guān) diswitch

1. and afford dip switch . not have to setting 提供dip撥碼開(kāi)關(guān)，無(wú)須設(shè)置

2. digit toggle switch 四位撥碼開(kāi)關(guān)

3. at the same time , this kind of gprs terminal not only supports " transparent data transmission " , but also has three kinds of interface voltage levels ( ttl / rs232 / rs485 ) that can be changed by setting the switcher 并且該gprs終端不但支持透明的數(shù)據(jù)傳輸，而且可通過(guò)撥碼開(kāi)關(guān)實(shí)現(xiàn)ttl rs232 rs485二種接口電平的轉(zhuǎn)換，因此可以） ’ “泛應(yīng)川到其它、業(yè)比川無(wú)線(xiàn)數(shù)據(jù)傳輸領(lǐng)域。