在下工作上也有接觸一點但是並不太懂請教一下

現在市面上的voip都是這樣的模式嗎?
網路不開會轉成市話?是接了一條市話線嗎?
所謂的網路電話互打是不是你給這台一個IP然後另一台也一個IP這2台靠網路
互通電話?
在下之前有接觸過sparq的voip，客戶申請2台一台要帶去國外
這樣是否就是打網內?免費的國際電話?
後來sparq換用別牌的voip
ip不能再任由客戶改只能在安裝時設定
這樣是否就不能像之前那台一樣打免費的國際電話?
感謝解惑^^

這是我整理的網路上收集文章！希望對大家有幫助！thank you
http://huai.gotdns.com/seednet/wagaly_talk.htm

For advanced users only. Use it at your own risk. No harm of studying it.
ADM5120 Data Sheet, Vcc(I/O) should be 3.3V.
You'll need RS232 converter or you can replace MAX3232CWE with MAX233A or Dallas DS276. Before continuing, you should find out the pin assignments first.

For advanced users only. Use it at your own risk. No harm of studying it.
ADM5120 Data Sheet, Vcc(I/O) should be 3.3V.
You'll need RS232 converter or you can replace MAX3232CWE with MAX233A or Dallas DS276. Before continuing, you could find out the pin assignments to the upper right of the CPU. What you need are RXD/TXD/GND/3.3V, I think.