The single-chip MODEM majors in MCU control system. This paper introduced the fundamentals of the chip, the interface circuit linking 73K222AL and AT89C51, and its programs.

文章分析了它的主要特性，同时给出了73K222AL与单片机AT89C51的接口电路和应用程序设计。

youdao

This papers is about the design of the interface based on the modem ST7538 , measuring and analyzing the performance of the interface.

本文根据选用的调制解调模块ST7538设计了一种接口电路并对它的性能进行了测试分析。

youdao

Also, this PLC transparent modem optionally supports RS-485 interface for compatibility reasons.

而且，该透明的PLC调制解调器由于其兼容性，可任意的支持RS - 485接口。

youdao

Modem and network interface are included, too, along with a really noisy cooling fan.

FORBES: Doesn't Do Windows

Additionally, there is a 56Kbps V.90 modem, a Sony iLINK interface, USB ports and a pair of speakers.

CNN: Sony Digital Studio allows professional video editing on a PC