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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.

Summary

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

General

Deliveries

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.

Features

- 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

An standard SIP client running on a seperate android phone will have to connect to the SIP server that was developed on the other android phone via wifi and an incoming and outgoing call would have to to be demonstrated.

Квалификация: Android, Mobile App Development, Java, Asterisk PBX, VoIP

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О работодателе:
( 0 отзыв(-а, -ов) ) Aachen, Germany

ID проекта: #20302900

15 фрилансеров(-а) в среднем готовы выполнить эту работу за $648

mingah429

Hello, I read your description and got what to do. I am looking forward to discussing more for your project. I am ready now, please message me to start your project. I have 7+ years of experience in this field I am Больше

$500 USD за 7 дней(-я)
(56 отзывов(-а))
8.4
tosal

Hello Sir / Madam, We will be happy to work for an application that runs on Android phones (4.0 or above) and can send/receive calls through SIP. Let us chat to clarify everything. Please check our work portfolio: h Больше

$750 USD за 21 дней(-я)
(105 отзывов(-а))
7.4
ShiaFirst

Hi, its pretty simple for me but I have few questions to ask, knock me for further discussion, PLEASE DON'T AWARD PROJECT BEFORE DISCUSSION. Thank You

$666 USD за 7 дней(-я)
(43 отзывов(-а))
6.2
eliteapps

We are top softphone client development team. we can customize your requirement using linphone. Do you have sip server? we dealt with top companies of telecom. What are the features you are looking for Calling, Messag Больше

$500 USD за 7 дней(-я)
(10 отзывов(-а))
5.5
skysoft0405

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$600 USD за 10 дней(-я)
(12 отзывов(-а))
4.5
myappsdevelopers

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$1150 USD за 22 дней(-я)
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4.3
exoxiainfotech

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3.0
Molotova

Hello, How are you? I hope you are fine. I have saw your descriptions what you want. I would like to work for your project if you want. I have over 5 years of experiences on the development of website&android&ios. I a Больше

$300 USD за 3 дней(-я)
(2 отзывов(-а))
1.7
farmanali0124

Hi there, I have checked the details. I have rich experience with Android, Asterisk PBX, Java, Mobile App Development, VoIP. Please initiate the chat so we can discuss this job in detail. I am new to freelancer.com bu Больше

$555 USD за 9 дней(-я)
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1.4
sunilsanghvi

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ninestar801

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0.0
dirtrace

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0.0
kevingajjar456

Hi, Thanks for posting !!! I have 14 years of experience in Website and Mobile apps. I have checked the requirement and understand. I have created App SIMILAR to Android creating SIP-GSM gateway do you want Больше

$300 USD за 3 дней(-я)
(0 отзывов(-а))
0.0
Vitspl

Hello, We have developed various VoIP apps from scratch which follows SIP protocol. We are also a Platinum certified partner of 3CX in US and we can also develop other VoIP apps from scratch. We are also well versed Больше

$750 USD за 20 дней(-я)
(0 отзывов(-а))
0.0
techvialinuxsaur

Using an Android phone as a GSM VoIP Gateway! Our solution App realizes the dream that builds VoIP Gateway into an Android phone. It makes your Android phone upgrade to movable VoIP Gateway immediately. You can not o Больше

$1500 USD за 21 дней(-я)
(0 отзывов(-а))
0.0