ISOmodem chip unit applies double-chip type: Modem controlling chip Si2457/34/15 and DAA chip Si3018. Modem controlling chip Si2457/34/15 is to control the Modem communication and provide the communication interface to the micro controller;

• ISOmodem芯片集采用双芯片形式:Modem控制芯片Si2457/34/15和DAA芯片Si3018。 Modem芯片Si2457/34/15是对Modem通信进行控制并提供与微控制器的通信接口;