問了一下廠家,把答複分享一下:
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 2nd dial tone, where now you press **9 <OBi No.>
http://www.obihai.com/OBiAdminGuide.htm#_Toc304466410