本文介紹了一種在Arm 9 處理器和Linux 操作系統的嵌入式組合中實現數據終端設備
與無線通信模塊之間的串行通信鏈路復用功能的新的方法。這種方法利用Linux 偽終端功
能，在數據終端設備和無線通信模塊之間實現一個串行通信鏈路復用層，與一般的實現數據終端設備與無線通信模塊之間串行通信鏈路復用協議TS27.010 的方法相比，更簡單、靈活，并具有通用的特點。本方法已成功應用于彩信和短信功能的整合中。
關鍵詞：串行通信鏈路復用；偽終端；嵌入式系統

Abstract： A new approach to Terminal Equipment to Mobile Station (TE-MS) multiplexer
in the embedded system of CPU based on Arm 9 in combination with Linux OS is proposed
in this article. By utilizing Linux pseudo terminal in the approach, a serial multiplexer layer can be implemented between terminal equipment and mobile station. Comparing to the normal method of implementing Terminal Equipment to Mobile Station (TE-MS) multiplexer protocol of TS 27.010, it is simpler and more flexible, and still universal. And it has been successfully used to integrate SMS and MMS.
Keywords：TE-MS Multiplexer；Pseudo Terminal； Embedded System