OCLTALK

OCLTALK is a Sofphone you can use to make calls with your OCLTALK voice service.

The OCLTALK App comes with many great features including:

High Definition Voice Calling (G722 Codec)
Secure encrypted voice calling
Conferencing and 3 way calling
Call Transfers
Ability to use your existing contacts list
Mute
Speakerphone
DTMF
Support for Wifi, 3G and 4G networks