AT+SSLMIPSTART 为什么报错

AT+SSLMIPSTART指令报错,找不到错误原因,试了各种格式

AT+SSLMIPSTART=183.230.40.39,6002       ERROR

AT+SSLMIPSTART="183.230.40.39",6002    ERROR

AT+SSLMIPSTART="183.230.40.39","6002"  ERROR

AT+MIPSTART="183.230.40.39","6002"         ERROR

AT+MIPSTART="183.230.40.39",6002           ERROR


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