回复：VOIP互打的一点想法，欢迎大家讨论

In fact, it may not that complicated, You can apply for two different accounts from the same voip company(such as gizmo5), these two accounts talk to each other for free. if you use ATA, after change setting in ATA, you can dial up the user in china. I ever tried, it works great.

所有跟帖： 

• 这个倒没想到，可以把ATA设置好带回国用吗？ -cableking- ♂ (0 bytes) () 10/14/2009 postreply 10:41:52

• You can buy ATA at Taobao in china. -phoenix22- ♂ (40 bytes) () 10/14/2009 postreply 11:50:43

• A lot of network phone(and ATA) has Peer to Peer function -真没想好- ♂ (44 bytes) () 10/14/2009 postreply 13:53:31