Generally, CDMA call connection is established immediately in calling party after outgoing call is initiated without called party’s off hook because CDMA network (BS, MS, etc) does not send the call connection information to call originate party shown as following CDMA call flow diagram.
This CDMA call connection scheme is no problem between CDMA mobile terminals, but in CDMA VoIP GSM gateway equipment for call termination service provider this scheme gives inaccurate real call connection timing information to VoIP Softswitch. This means that there is time difference between CDMA call connect time and real call connect time.
For solving call connection time mismatching problem, AddPac CDMA VoIP gateway support proprietary voice confirmed call connection algorithm. This algorithm is field proven and well applicable in several regions like as Pakistan, Bangladesh, Indonesia, Nepal, etc.

CDMA VoIP Gateway Call Flow Diagram
(CDMA Gateway - BS - MS)



CDMA VoIP Gateway Comparison Table

Network Diagram

AddPac Technology