隨著網際網路骨幹頻寬大幅提昇，用戶端亦因ADSL與Cable Modem等寬頻的裝設而擁有大量之傳輸頻寬，此外無線網路的普及和成本的降低，使得利用無線區域網路連接到網際網路傳輸大量的即時資料之嵌入式系統，漸漸變成眾多廠商的研發重點。在此過程中，將使得傳統的資訊、通訊與家電等產品的區隔漸趨模糊，結合 Computer、Communication與Consumer等不同領域的嵌入式網路系統將成為主要技術。

本論文嚐試將無線區域網路802.11b，SIP protocol及嵌入式uClinux結合，實際做出一個無線網路電話，考慮省電的問題,而在主要元件的選擇及省電控制機制的改善，完成一個待機時間較長的無線網路電話。且由於uClinux與Linux相容特性，也預留將來增加新功能的彈性，相容性及開發速度，為未來的數位資訊家電提供一個良好的發展平台。
本論文嚐試將無線區域網路802.11b，SIP protocol及嵌入式uClinux結合，實際做出一個無線網路電話，並考慮省電的問題而在主CPU的選用，省電控制機制及無線網路介面之撰擇，做出一個待機及通話時間較長的無線網路電話。且由於uClinux與Linux相容特性，也預留將來增加新功能的彈性，相容性及開發速度，為未來的數位資訊家電提供一個良好的發展平台。

Along with the frequent promotion of the internet backbone bandwidth, the end-user also owns a large amount of transmission bandwidth because of the installation of ADSL and Cable Modem. Besides that, wireless LAN popularization and reducing the cost of wireless LAN has gradually turned the embedded system which can transmit a large amount of instant informations by wireless LAN connection to internet into the focus of the research and development of numerous manufacturers. The process mentioned above will gradually make the division of the products, such as traditional information, communication and electrical household appliances, etc. more blurred. The embedded network system which combines different fields like computer, communication and consumer etc., will soon become the main technology.

In this thesis, WLAN 802.11b, SIP protocol and embedded uClinux are combined to make a WIFI phone. About the main components select and the power saving mechanism improve, considering the saving of power, we make the WIFI phone of longer standby time. Because of the compatible characteristic of uClinux and Linux , we reserve the elasticity that will increase the new function in the future, compatibility and speed of development. And we also offer a good development platform for digital information household appliances in the future.

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