用CMDA网打网络电话语音质量似乎不如GSM网，CDMA网的特点是照顾信号好的终端

信号强优先级就高，其思路是现在信号不好的终端过一会儿信号可能就好了，所以先保证当前信号好的终端。

Another important aspect of the EV-DO forward link channel is the scheduler. The scheduler most commonly used is called "proportional fair". It's designed to maximize sector throughput while also guaranteeing each user a certain minimum level of service. The idea is to schedule mobiles reporting higher DRC indices more often, with the hope that those reporting worse conditions will improve in time.

网上讨论的结论往往是C网打电话，延时，掉包比较明显。

所有跟帖： 

• GSM网即便是EDGE模式打电话也还凑合 - C网要是掉到1xRTT状态基本没戏，因为 -mc3361- ♀ (90 bytes) () 08/11/2011 postreply 13:43:30

• 所以我家里的EVDO modem都是外接大天线，双USB口供电 -fitwxc- ♂ (160 bytes) () 08/11/2011 postreply 13:54:33

• CDMA modem 因该是700毫安的耗电，一般500毫安的USB口有些将就 -mc3361- ♀ (0 bytes) () 08/11/2011 postreply 13:56:45

• 接收很小，主要是发射。 -fitwxc- ♂ (0 bytes) () 08/11/2011 postreply 14:42:45