VoIP SIP SDK for Android

A VoIP SDK for Android phones.

ABTO Software VoIP SIP SDK for Android allows you to build a custom SIP softphone for Android 2.3.x, 4.x, 5 that can support voice and video calls. Versions of the software is available in Windows, Mac OS and Linux environments. Development environments you could use include Eclipse and Android Studio. Android 2.3.x, 4.x, 5 and SIP and RTP are supported. The tool supports UDP/TCP and secure connection via SRTP and ZRTP. The development kit is compatible with STUN and other IETF standards (compatible with SER, OpenSER and Asterisk). The development system supports ICE, SIP Registrar (SIP server) support, Audio and video calls. The calling signaling is completely compatible with DTMF. Single line is supported. Status messages, user agent name, SIP port change, SIP port check, etc. are supported. Bluetooth, second registration, different network (Wi-Fi, GPRS, 3G, EDGE), registration proxy are supported. Log management is supported.

The kit will let you develop apps that supports a range of codecs including G.711- ALaw, G.711-muLaw, G.729, Speex, Theora, GSM, H.263, H.263+, H.264, etc. Whole set of end user features include setting a custom ringtone, using the softphone with no registration (useful for calls in local network), communicating via IM, etc. The software also lets you check Call history, store and use Contacts list, play file to conversation, etc. are available in addition. Recording a call, sending a DTMF (useful for calls to call center) call, enable/disable Video, microphone and speaker during the call etc. also are available. This is a very good tool.

ABTO Software's VoIP SIP SDK allows quick VoIP softphone app development. Also you can use it when you need to add VoIP features to your software.
Quick facts about ABTO Software VoIP SIP SDK for Android:
Versions:
VoIP Video SIP SDK for Android
Standard VoIP SIP SDK for Android
Trial:
Download sample sip softphone on Google Play
Request trial SDK
Features:
All wide-spread Android versions (2.3.5+, 4.x, 5.x)
Support of SIP and RTP
UDP/TCP support
secure connection via SRTP and ZRTP;
STUN and other IETF standards (compatible with SER, OpenSER and Asterisk)
ICE support
SIP Registrar (SIP server) support
Audio and video calls
Single line support
DTMF
Status messages
User Agent name support
SIP port change
Available SIP port check
Bluetooth support
Second registration
Different networks support (WiFi, GPRS, 3G, EDGE)
Registration proxy support
Log support
Available codecs:
G.711-ALaw
G.711-muLaw
G.729
Speex
Theora
GSM
H.263
H.263+
H.264
Also you can use the following user features of VoIP Video SIP SDK for Android:
Set a custom ringtone
Use softphone with no registration (useful for calls in local network)
Communicate via IM chat
Check Call history
Store and use Contacts list
Play File to conversation
Put a call on Hold
Record a Call
Send DTMF (useful for calls to call center)
Enable/disable Video, Microphone and Speaker during the call
Sample app is available at https://play.google.com/store/apps/details?id=org.abtollc.videosoftphone