Kolltwo

Kolltwo is the Mobile Dialer that allows to make VoIP calls from any of the android devices and Kolltwo uses 3G/Edge/Wi-Fi Internet connectivity. Kolltwo is developed based on the requirements of VoIP Providers business needs.

Kolltwo Features:-

It uses SIP protocol based for signaling

Supports G729, PCMU, and PCMA codecs

Runs behind NAT or Private IP

User Friendly Interface

Auto Sync of Balance

Real Time Sip status messages

Call History

Address book integration

Compatible with all sip standard switches

Kolltwo has very efficient implementation of jitter buffer to play voice smoothly.

Silent suppression and comfort noise generation has been used to reduce the bandwidth usage, and this makes the dialer more efficient in making VoIP calls.