R Dialer

- [R拨号或者称为环拨号器进行VoIP通过互联网打电话

R Dialer is a Mobile Dialer that allows to make VoIP calls from any of the android devices and it uses 4G/3G/Edge/Wi-Fi Internet connectivity.It is developed based on the requirements of VoIP Providers business needs. It has a following features

• It uses SIP Protocol and compatible with all SIP standard switches

• Has a incoming calls receive options

• Runs behind NAT or Private IP

• tunneling included ( both signaling & media)

• Brand name: header and footer text can be displayed

• Enabled all common codec including G.729 and HD audio

• Balance link can be integrated with softswitch for rating display

• call recording options ( optional)

• System phone-book and Call history features

• Full 24/7 manned supports included

It also has a 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.

Technical Features

• Connects directly to your preferred VoIP server

• Transport protocols: UDP, TCP, Http available with tunneling

• Built in Tunneling and encryption for both signaling and media

• Audio Codec: G.711 (PCMU and PCMA), GSM, Speex, iLBC, G.729

• Automatic fine-tuning (in

• It supports all android versions from 1.6

• Connection: WiFi / Mobile GPRS, EDGE, 3G, 4G

cluding codec selection)

• AEC (acoustic echo canceller), Denoise filter, AGC (automatic gain control), PLC (packet loss concealment),

Silence suppression

• Multi-tasking support -listening for incoming calls in the background

• Speakerphone, Mute and Hold

• DTMF (RFC2833 or INFO method

• Balance and rating display, call timer, status logs, detailed log

• NAT/Firewall support, stable SIP and RTP ports, auto QoS, light STUN protocol and auto configuration

• Supported methods: INVITE , ACK, PRACK, BYE, CANCEL, UPDATE, MESSAGE, INFO,