Discovered Pages
[Discover] 什麼是hscsd （高速電路交換數據） ？ http://www.tech-faq.com/lang/zh-TW/hscsd-high-speed-circuit-switched-data.shtml
(mobile technology) 
[Discover] High-Speed Circuit-Switched Data - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/High-Speed_Circuit-Switched_Data (wikipedia hscsd gsm)
[Discover] What is GPRS (General Packet Radio Service)? http://www.mobile-phones-uk.org.uk/gprs.htm (gprs hscsd edge mobilephone)