用CMDA網打網絡電話語音質量似乎不如GSM網，CDMA網的特點是照顧信號好的終端

信號強優先級就高，其思路是現在信號不好的終端過一會兒信號可能就好了，所以先保證當前信號好的終端。

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.

網上討論的結論往往是C網打電話，延時，掉包比較明顯。

所有跟帖： 

• GSM網即便是EDGE模式打電話也還湊合 - C網要是掉到1xRTT狀態基本沒戲，因為 -mc3361- ♀ (90 bytes) () 08/11/2011 postreply 13:43:30

• 所以我家裏的EVDO modem都是外接大天線，雙USB口供電 -fitwxc- ♂ (160 bytes) () 08/11/2011 postreply 13:54:33

• CDMA modem 因該是700毫安的耗電，一般500毫安的USB口有些將就 -mc3361- ♀ (0 bytes) () 08/11/2011 postreply 13:56:45

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