Asterisk on Android creating SIP-GSM gateway

I need an application that runs on Android phones (4.0 or above) and can send/receive calls through SIP (Can use any sip stack like sipdroid) and forward it to the GSM network. The application should then forward the audio and convert from SIP to GSM and vice versa.

Full description below. Please review and message me with considerations. If any requirements are unable to be met, please let me know before we make a deal.


The goal of this project is to develop an Android application that can send calls through SIP and forward them to the GSM network AND receive calls from GSM and forward to SIP.

The application should then forward the audio and convert from VoIP to GSM and vice vers



The application working in APK format

Full source code

Simple manual for compiling and generating the application from source

A SIP client running on another phone that connects to the server via WIFI and able to demonstrate the functionality in this project.


- Route call from SIP to GSM

- Route call from GSM to SIP (preconfigured SIP client)

- Convert audio from/to SIP and GSM networks

- Able to run on Android 4.0 and up.

Application Configurations

- Enable or disable the app

- Enable to receive calls only on wifi or all networks

- Enable to route calls from GSM to SIP (SIP address is configured through an API)

- The number to send the call should be configured through an API that is supplied with the APP

- Enable to route calls from SIP to GSM

- Must run on background

- Must be very lightweight to run on small memory devices

- Configure SIP Accounts.

Sip Requirements

- Register on Sip Proxy/Gateway

- Receive call authenticated by IP, user/pass or no authentication.

- Make calls with or without authentication

- Forward DTMF digits using RFC2833 or inband

- Use codec G711 and GSM

- Be able to use codec G729

- Receive through GSM one 1 simultaneous call and rout it to a predefined SIP client

- Be able to store a CSV with all calls made

Skills required:

Android, VoIP

Habilidades: Android, Asterisk PBX, VoIP

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Información del empleador:
( 2 comentarios ) ceuta, Morocco

Nº del proyecto: #17731877

10 freelancers están ofertando el promedio de $1329 para este trabajo


Hello, I m fulltime available for work , I have 6 years of experienced on mobile application ( Android +iphone/ ipad ) and App admimn with development web services where admin can manage the app from backend Más

$1125 USD en 20 días
(128 comentarios)

Perfect Hello, I have gone throw your project post requirement you need android, IOS sip-GSM gatwway app and website. I am full stack developer, I have worked many Application before and live on app store. Please Más

$1250 USD en 20 días
(59 comentarios)

Hi there, I have read the details I am experienced with Android, Asterisk PBX, VoIP. I can help you with this job, Please come to chat so we can discuss this job.

$1250 USD en 20 días
(8 comentarios)

Good day! Man you give me geniuos idia. because we can create app that any people can install to his phone and get some small profit for that. for axample 0.001$ per minute. and we will using his phone to send calls. Más

$2222 USD en 60 días
(11 comentarios)

We have 14 year of experience in building VOIP [login to view URL] have a right solution for [login to view URL] are building a customize web application using codeigniter framework,Asterisk and [login to view URL] check backend of [login to view URL] Más

$2277 USD en 25 días
(1 comentario)

Hello Friend, I have 4+ year experience in design and development of Websites and Mobile Applications. I have relevant experience to your requirement. I can do your project. I have expertise in developing Appointme Más

$1250 USD en 20 días
(7 comentarios)

Hi... How are you?. I saw your description carefully. -----Project Title------ Asterisk on Android creating SIP-GSM gateway -----Project description----- I need an application that runs on Android phones (4 Más

$750 USD en 3 días
(0 comentarios)

Hi client, I am expert in mobile apps development with excellent UI design specially for mobile apps. i have read you requirement very carefully that you are expected from developer. i can help you both part for des Más

$1250 USD en 20 días
(0 comentarios)

Hey, feeling interest to go with the project I have checking your requirements. My speciality. : I STRICTLY BITE IF AND ONLY IF I CAN CHEW. Let's discuss more when u knock.i am ready to start your project.

$800 USD en 8 días
(8 comentarios)

Now i have a android aplication phone, based on zoiper sdk; this aplication are write en b4a and support 4 wait to connect, support video and sms. only you need write the 3 basic parameter and the app try to connect . Más

$1111 USD en 25 días
(0 comentarios)