Esteem VoIP Mobile Dialer

Esteem VoIP Mobile Dialer là đầy đủ chức năng điện thoại mềm để thực hiện cuộc gọi VoIP.

Esteem VoIP Mobile Dialer is full functional soft phone to make VoIP calls. It requires internet connection of GPRS/3G/4G or WiFi network.

Features:

1. VoIP incoming and outgoing call

2. Supported codec: G.729

3. Support full functional SIP to SIP call

4. Works behind NAT

5. Can bypass any Firewall

6. Low bandwidth consumption by customized byte saver solution

7. Can bypass SIP blockage

8. Smart echo cancellation technique

9. Synchronization with phone contact

10. On screen call time and balance display