当配置调制解调器类型为（S128）=0，P400是一个400 MHz许可窄带调制解调器。
When configured as Modem Type (S128) = 0, The P400 operates as a 400 MHz Licensed Narrowband modem.
您猜猜，第一个测试版的用户就使用了那个类型的调制解调器。
You guessed it... the first beta customer used only that type of modem.
智能网上，明确地指定了服务用于语音，所有其他数据类型需要专线接入，或者烦人的调制解调器。
The Intelligent Network is tightly specified for voice. All other data types require special leased access lines, or awful kludges like modems.
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