You Must have An Android Voip Dialer already to Bid.
Please don't Bid if you don't have a Working Android Voip Dailer with standard features, Anti Block tunneling and Byte Saver for me to test immediatelly. Your Android Voip Dailer App must be able to register to OpenSip Server
Basically we are buying your working Android Voip Dialer and asking you to add PTT Push To Talk features which is the same as Walkie Talkie to it.
The added PTT will share Db with the Dialer. If you need to see how PTT works please visit zello and test their PTT app. Also we can provide you a sample open source ptt code.
PTT employs half duplex instead of full duplex. Lets say full voip uses 2 channels for conversation , but PTT use just one. When one party speaks the other must wait.
Only Bib If you understand and have the requirements I need.