Baklan

Easy to use SIP phone for VoIP calls over 3G or WiFi

Baklan is an open source SIP phone, available on Android devices, that makes possible to communicate freely with people over the internet.

Baklan makes use of the SIP protocol (an open standard for internet telephony) and can be used with any SIP VoIP operator, including our SIP audio service.

Main features:

- HD audio and rich codec support: Opus, SILK, G.729, G.711, Speex, iLBC, GSM

- Echo cancellation

- Microphone gain and speaker volume adjustments

- Call recording

- Secure communication with TLS and Secure RTP (SRTP) or ZRTP encryption protocols

- Push notifications for incoming calls to improve your battery life

- Support for NAT traversal using ICE with STUN or TURN protocols

- Support for multiple SIP accounts

- Simultaneous registration of multiple SIP accounts, have multiple accounts registered to receive incoming calls and switch the default account used for outgoing calls

- Presence using the SIMPLE standard with generic SUBSCRIBE/NOTIFY and PUBLISH messages

- Very intuitive UI

- Contact list integrated with primary account contact list

- Detailed call list and history

- Integrated billing information including balance, call rates, charges and payments

- Account wizard to create or restore SIP account at any VoIP provider

- Can be used with any SIP provider

- Application debugging