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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?

Kĩ năng: VoIP, Asterisk PBX, Java, Lập trình C, Kiến trúc phần mềm

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Về Bên Thuê:
( 0 nhận xét ) Mariposa, United States

ID dự án: #24592975

16 freelancer đang chào giá trung bình $4442 cho công việc này

arhamsoftltd

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 trong 75 ngày
(102 Nhận xét)
8.5
liveexperts123

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 Thêm

$5000 USD trong 5 ngày
(80 Nhận xét)
7.4
RaspberryOculus

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 Thêm

$6000 USD trong 7 ngày
(29 Nhận xét)
6.3
mula9211

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 Thêm

$3000 USD trong 20 ngày
(26 Nhận xét)
5.4
Rogerfalcone

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 Thêm

$4444 USD trong 23 ngày
(2 Nhận xét)
4.4
munirhayat

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. Thêm

$3333 USD trong 7 ngày
(14 Nhận xét)
4.4
mrksoftwarehouse

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 Thêm

$6000 USD trong 21 ngày
(1 Nhận xét)
2.6
crea8ivecrowd

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 Thêm

$3000 USD trong 25 ngày
(1 Nhận xét)
1.1
SparkStreet

?? 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 Thêm

$4000 USD trong 14 ngày
(1 Nhận xét)
0.6
oleksandrshiyan

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 Thêm

$4000 USD trong 7 ngày
(0 Nhận xét)
0.0
nkvasic5star

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 Thêm

$4000 USD trong 7 ngày
(1 Nhận xét)
0.0
kulikovivan35

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 Thêm

$4000 USD trong 7 ngày
(0 Nhận xét)
0.0
thisotherperson

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

$5000 USD trong 30 ngày
(0 Nhận xét)
0.0
Viitorcloud

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 Thêm

$5000 USD trong 40 ngày
(0 Nhận xét)
0.0
guravitalij

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 Thêm

$3300 USD trong 25 ngày
(0 Nhận xét)
0.0
nalliancetech

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 Thêm

$5000 USD trong 120 ngày
(0 Nhận xét)
0.0