Try firmware update first ...

http://www.obitalk.com/forum/index.php?topic=9.msg15#new

这个firmware说改正了某些打进Google Voice没有声音的问题。有时Google Voice/Google Chat改动一些参数，OBi被迫跟着改firmware，用户也要跟上。

Enhancements & Fixes in Maintenance Release 1.3.0(2690):
- Improved audio-path synchronization on call establishment. Also fixes certain conditions where audio path is not initiated on incoming calls using the Google Voice communications service.
- Fixed: If the Caller ID coming from PSTN has a dash '-' inserted between the number(s), the Caller ID cannot be displayed on the telephone connected to the PHONE port.