在中国用 Obi-talk，

问了一下厂家，把答复分享一下：

It does work in China

By default, when you call **9 <OBi No.>, it uses codec G711 – which requires 100Kbps

if the internet bandwidth is not big enough, then you can force to use a different codec for

lower bandwidth usage.

 

*4729 you will hear a 2^nd dial tone, where now you press **9 <OBi No.>

http://www.obihai.com/OBiAdminGuide.htm#_Toc304466410