We are looking for a SIP client SoftPhone for iphone, android and blackberry with the following requirements :
The SoftPhone supports SIP for signaling.
The SoftPhone supports G729, GSM and [url removed, login to view] codec for sending audio data.
The SoftPhone can run behind NAT or on private IP. Dialer supports NAT and firewall traversal using STUN.
So client behind the firewall can make VoIP call using Dialer.
The SoftPhone runs on application layer so it supports GPRS, WiFi and Bluetooth for Internet connectivity.
Operating system: SoftPhone will run on the iPhone and phones having Blackberry OS or Android OS.
The SoftPhone works with SIP username/password.
The SoftPhone can send SMS over IP.
The SoftPhone can send/receive HTTP request for customer's accounts (Phone Number, Credit, Alerte, etc...)
The SoftPhone Supports Loud Speaker.
Can Dial directly from the phone’s address book.