Code for VOIP Phone System

I am looking for a parallel code to be written to the phone systems prisons use for inmates to call out. They are usually prepaid phone systems. An example is GTL. Can we use the phone system and charge a cheaper rate?

Habilidades: VoIP, Asterisk PBX, Java, Programación en C, Arquitectura de software

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Información del empleador:
( 0 comentarios ) Mariposa, United States

Nº del proyecto: #24592975

16 freelancers están ofertando el promedio de $4442 para este trabajo


Hi, I have experience with Asterisk, The project sounds interesting though it required R&D. I would like to discuss the project requirement in more detail and ready to initiate right away. Best Regards, MK.

$6000 USD en 75 días
(102 comentarios)

Hi there,I'm biddin on your project "Code for VOIP Phone System" I have read your project description and i'm an expert in C programming and machine learning therefore i can do this project for you perfectly.I still ha Más

$5000 USD en 5 días
(80 comentarios)

Dear Sir, I have built a SIP Voip Phone (complete phone) based on ED137 ( for aircraft communication). I am an electrical engineer with 20 years of experience in this area. I got everything you need. I am going throug Más

$6000 USD en 7 días
(29 comentarios)

Hi, I have 18 years of experience in VOIP and asterisk. I offer my services for your project. Please have a look at my profile to see all my experience details. I assure you of a high quality professional service. We c Más

$3000 USD en 20 días
(26 comentarios)

Hi,dear client. Thanks for taking your valuable time for reviewing my proposal. I am very interested in your project - 'Code for VOIP Phone System'. Because I have been familiar with similar [login to view URL] profile is:http Más

$4444 USD en 23 días
(2 comentarios)

I have 10 years of experience in developing voip phone system and have successfully done two for inmates in prison using asterisk, freepbx, A2billing. I have years of experience related with prison voip phone system. Más

$3333 USD en 7 días
(14 comentarios)

Hi, I see you have an interesting idea for the prepaid inmate calling system. Let's discuss the details directly as I have few interesting things for you. To not share too much - I'm doing this in a different country Más

$6000 USD en 21 días
(1 comentario)

Hello There, I'm a professional web developer which not only uses techniques in creating things, but also much creativity. I have been working as a professional web developer for the last 8 years + and have done many Más

$3000 USD en 25 días
(1 comentario)

?? American VoIP developer happy to talk with you about your project to build an alternative IN DOC Inmate Telephone Service. There are a lot of considerations to talk through when putting together a prepaid call prog Más

$4000 USD en 14 días
(1 comentario)

Hi there! I have read your project and I can give you the best solution for it. Already I have built Voip phone system App, When you comes to me, I will show it. I am a dedicated developer always looking to learn and Más

$4000 USD en 7 días
(0 comentarios)

Dear client! My name is Nikola.I have checked your proposal. Already I have many experience about VOIP phone system building. I am a professional Mobile/Admin(Backend API) developer worked on local company. I have read Más

$4000 USD en 7 días
(1 comentario)

Code for VOIP Phone System Dear sir I have completed projects similar to your requirement in the past. If you could share your project detail requirements, I will share relevant past work and demo. I already develop Más

$4000 USD en 7 días
(0 comentarios)

I know exactly what it takes to make what you require but need more info on what is already used - more details.

$5000 USD en 30 días
(0 comentarios)

Greetings, Much appreciated for the great opportunity. I came across your requirement that you area looking for a highly-experienced App development team to build an Voip Phone System I am glad to say we have equiva Más

$5000 USD en 40 días
(0 comentarios)

Hi, I could develop a system that provided a closed telephone connection using prepaid services. In general, I have been developing telephone systems of varying complexity and stability for the past 20 years. I have a Más

$3300 USD en 25 días
(0 comentarios)

Narinder Alliance Technologies LLC An IT Consulting and Software Development company. We have a team expert in Web Designing, Application Development and Databases. We have worked on various projects across various in Más

$5000 USD en 120 días
(0 comentarios)