sip softphone for windows desktop

Job ID: 35806765

Budget: $30 – $250 USD

Looking for a sip softphone for windows desktop with g729 codec ,call transfer and conference option.
Should work behind nat. Stun and rtp ports should be auto filled and static.

We will build with basic options now and will upgrade more , so bid with your best budget.
Related categories: C Programming Asterisk PBX VoIP