In Progress

Android apps to bridge voice from SIP to GSM


I have a project to develop Android apps to bridge voice from SIP to GSM, below the requirement and flow


1. Support all Android phone and all android version

2. SIP must support standard sip pbx or sip proxy. example Asterisk or VoipSwitch

3. Option to support SIP TLS

4. Support Wifi and 3G internet


1. Android using SIP can register to SIP PBX or SIP proxy using Wifi or 3G

2. SIP PBX/Proxy send call to android phone and android phone will send call to GSM


1. SIP PBX/Proxy ->(via internet Wifi or 3G) -> Android Phone -> GSM Network


1. Deliver the source code and installation apps

Skills: Android, Mobile App Development

See more: network flow example, network flow, must have android apps, flow network, android version 4.2.2, android version 4.1.2, android version 4.0.4, android phone apps, android gsm to sip, android 4.2, voipswitch, voice support, voice call, GSM, Develop apps, bridge, android sip, android register, Android Apps, android apps develop, android bridge gsm sip call, android asterisk bridge, gsm code, android sip bridge, android gsm sip bridge

About the Employer:
( 0 reviews ) Aliso Viejo, United States

Project ID: #4486142

Awarded to:


Hi, please look at my private message.

$2214 USD in 5 days
(0 Reviews)

14 freelancers are bidding on average $2505 for this job


Hi We have read your requirements. We are interested in your project as we have indepth expertise in android app development. Please check private message board for details.

$3092 USD in 20 days
(17 Reviews)

Respected Client, Please check PMB for listing and confident to complete the project with quality services.. Best Regards

$3090 USD in 45 days
(42 Reviews)

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$2472 USD in 30 days
(18 Reviews)

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$2575 USD in 30 days
(1 Review)

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$2688 USD in 15 days
(7 Reviews)

I believe that I am the best for this. Please check private message.

$2748 USD in 3 days
(10 Reviews)

Hi!! Please Check My PMB For More Detail!!!! Thanks & Regards,

$2575 USD in 25 days
(16 Reviews)

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$2362 USD in 7 days
(3 Reviews)

Ready to start and will provide you the best. Thank you.

$1650 USD in 24 days
(1 Review)

Thanks for posting the project on Freelancer, the project requirements completely falls under our domain and where this project exactly matches with our technical strengths and our abilities to deliver the work on time More

$2475 USD in 30 days
(0 Reviews)

Dear sir i am expert in Android, Mobile Phone apps . i have 3 years working experience in SMM SEO SME also i understand what do you want to successfully run your project so if you agree with me so please gave me a chan More

$2475 USD in 15 days
(0 Reviews)

Hi, We take pleasure to introduce ourselves as a team of experienced professionals in the fields of Mobile Application Development and Design. Currently, our expertise includes Android, Blackberry & iPhone plat More

$2084 USD in 14 days
(0 Reviews)

Hi, Veltrod Software services is a global software consulting company specialized in providing Mobile applications, Social media frameworks and eCommerce solutions. Leveraging best-in-class people, processes, and t More

$2575 USD in 35 days
(1 Review)