WHATSAPP to SIP Calling Gateway

$1500-3000 USD

Chiuso

Pubblicato

9 mesi fa

$1500-3000 USD

Pagato al completamento

For this project, I’m looking for a freelancer to develop a WHATSAPP to SIP Calling Gateway. Communication will primarily be through email, as that is my preferred method. I have specific requirements for the SIP gateway, which I’ll provide once I’ve chosen a freelancer. As timeline is flexible, the Freelancer can set their own timeline for project completion – however, I would appreciate timely communication so I can be aware of progress. I’m looking for an experienced freelancer who can complete the project to a high standard with excellent communication. PLEASE DO NOT OFFER TO MY PROJECT BEFORE READING. IF YOU READ THE PROJECT PLEASE TYPE "YES I READ YOUR PROJECT" ON YOUR OFFER, AND DO NOT SPEND TIME IF YOU ARE NOT SURE FOR SOLUTION, PLEASE. !! DO NOT TRY TO INCREASE YOUR OFFER WITH CHAT. !! PUT YOUR EXACTLY AND LAST OFFER. if you have questions please ask and share your suggestions. ======================================================= if you did a similar project before please share with us some pictures and information. you will be our priority. Hi, The WhatsApp channel allows consumers to connect with brands and brands to connect with consumers from the WhatsApp app on their smartphone. We need to develop a SIP to Whatsapp voice gateway to send some of the calls from our PBX. The gateway should be able to pass voice calls incoming over SIP and forward them through WhatsApp to complete the call to the destination's WhatsApp number. - We will provide the phone number/phone numbers and pictures for the WhatsApp account. - The project should be multi-channel. I would like to able to start multi-calls ( you can run multi WhatsApp account with multi-phone number or can use just one WhatsApp account with multi calls. ) - The development platform/operating system is not important. you can use Asterix, Freeswitch, FreePBX vs... - The implementation should return the correct call error codes to the SIP backend like CALL SUCCESS(200 OK), BUSY(486 Busy Here), UNAVAILABLE(503 Service Unavailable), etc.... to try other rounds on the other SIP Switch. Functional flow 1) Calls from PBX/sip gateway will be sent to WhatsApp gateway 2) WhatsApp gateway converts the SIP to WhatsApp protocol 3) If it is necessary, there are multi-channels WhatsApp account in the WhatsApp gateway and your code selects any of the available accounts to make a call. You can run a multi WhatsApp account/channel with a multi-phone number in the WhatsApp gateway or you can use just one WhatsApp account/channel(if it is possible multi calls from an account.) for multi calls on the same time. 4) if all of the WhatsApp accounts occupied send the error code back "600 Busy Everywhere" or "503 Service Unavailable". 5) if the number is not used in WhatsApp if there is no associated Whatsapp account for the called number. then it sends "503 Service Unavailable" error and we will reroute to other gateways. 6) The called number carried in call header will be checked by the WhatsApp gateway, if there is an associated WhatsApp account with this number and the number is online, the call will be terminated on WhatsApp. 7) If the call is successfully completed or called number does not answer, then call will be disconnected. 8) The system must return the appropriate sip error code if the call is busy or no answer. 9) source code has to be shared with us with explanations for debug purposes in the future. the project must be like: [login to view URL]

Android

PHP

Mobile App Development

C Programming

Python

Rif. progetto: 37056629

Info sul progetto

35 proposte

Progetto a distanza

Attivo 8 mesi fa

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35 freelance hanno fatto un'offerta media di $2.414 USD

@AwaisChaudhry

Hello Good evening , I hope you are doing great. Just finished reading the brief details of your job . I see you have been looking for a freelancer who has experience with Mobile App Development, Python, PHP, Android and C Programming. Upon the first look I feel confident about getting it done because of having experience doing similar jobs My Experience? I have 9 years of experience working with those technologies. Its been 8 years since I have been working on freelancer.com, Please review my profile. Check: Skills, Portfolio, Customer Feedbacks. Why Choose Me? 1. I have done more than 250 major projects only on freelancer.com. 2. I have not received a single bad feedback since last 5-6 years. 3. You will find 5 star feedback on last 100+ major projects which shows my clients are happy with my work. Portfolio: https://www.freelancer.com/u/AwaisChaudhry Timings: 9am - 9pm Eastern US Time I would like you to start the chat so we could discuss it in detail and we will continue from there. Thanks! Awais

$3.000 USD in 13 giorni

5,0

(131 valutazioni)

8,7

@point2solutions

Dear Good day, We went through your project description and it seems like this project is very fit for me. And I can work full-time in your time zone and I can start to work right now. Regards, Raghav

$2.250 USD in 30 giorni

4,7

(56 valutazioni)

8,2

@pvsysgroupinc

I understand your need for a WHATSAPP to SIP Calling Gateway and can provide the solution you are looking for. My team consists of experienced professionals with a wealth of experience in Android, PHP, Python and other related technologies. We have developed many successful projects before so you can rest assured that your project will be completed on time with excellent communication. We have extensive experience in working with WhatsApp, specifically with regards to setting up an account and making calls using the platform from within the app. This is necessary due to the multi-channel nature of the service - you can run multiple WhatsApp accounts with multiple phone numbers in the same account or use just one account with multi calls on the same time. We also have experience in implementing systems that return the correct call error codes back to the SIP backend - specifically CALL SUCCESS(200 OK), BUSY(486 Busy Here) and UNAVAILABLE(503 Service Unavailable).

$3.000 USD in 365 giorni

4,7

(96 valutazioni)

7,8

@corpmember29

Hi There! You need a WHATSAPP to SIP Calling Gateway, I have seen the project description carefully send me a message for more discussion. As per your project need, I can build your project more efficient with my knowledge and experience. I'm looking to work with you and I'm very sure that you'll feel great to work with me. Along with your project requirement, I'll provide you clean source code with free bug fixing and maintenance. I Have 7+ years of work experience in web and mobile Apps development. I have worked on so many projects like Real Estate, Grocery, Classifieds, Instagram Clone, Taxi, Delivery, food delivery, Inventory Management, Reward, Social Media, On-demand Services provider, Nutrition, school management, Pos, E-commerce, Event booking, etc. I am fully dedicated to doing my work very efficient and less time-consuming. "Looking forward to your positive response please open your chat window to more details" Thanks. regard, Christina

$1.600 USD in 16 giorni

4,9

(76 valutazioni)

7,3

@DrSyafiq

Hello lindolfoalves, We went through your project description and it seems like our team is a great fit for this job. We are an expert team which have many years of experience on PHP Please come over chat and discuss your requirement in a detailed way. Regards

$3.000 USD in 7 giorni

5,0

(27 valutazioni)

6,8

@kdsighappsol

"YES I READ YOUR PROJECT" Hi, WHATSAPP to SIP Calling Gateway I read your requirements carefully and understood very well about the project scope and start working accordingly in stages. I am having more then 7+ years of experienced in programming and i believe that i can start working step by step and achieve the project goal in short time frame. I look forward to hear from you soon. With Regards, Thanks kedar

$2.500 USD in 30 giorni

4,6

(61 valutazioni)

7,7

@kozaktr

Hello. First of all, I am so excited to find such a high technical project. As you can check on my profile, I have over 2 decades of web/mobile app developing experience. So far, having done tons of projects, I get deep knowledge in these fields including C Programming, Mobile App Development, Android, PHP and Python. Now I am free to work and available at any time and I can meet your timeline with the best work. Looking forward to hearing from you. Thanks for considering me.

$2.000 USD in 7 giorni

4,9

(54 valutazioni)

6,5

@dvcontact

Are you looking for an experienced freelancer to develop a WHATSAPP to SIP Calling Gateway? I am a skilled programmer with expertise in PHP, C Programming, Python, Mobile App Development, and Android. I have experience in developing SIP to WhatsApp gateways and can provide a high-quality solution that meets your requirements. I understand your need for timely communication and will provide regular updates on the progress of the project. I am confident that I can complete the project to a high standard and am happy to provide a free demonstration of the solution even before the project is awarded. I look forward to hearing from you. Best regards, Smith

$2.250 USD in 7 giorni

4,8

(7 valutazioni)

6,1

@ntsolutions

Dear Client, We would like to propose our services for the development of a WHATSAPP to SIP Calling Gateway project. As N&T Negocios y Tecnologias s.r.l., we have been a leading IT industry development company for over 20 years, specializing in web, mobile, blockchain, and AI projects. With our extensive experience and expertise in these domains, we are confident in our ability to deliver a high-quality solution for your specific requirements. The aim of this project is to develop a SIP to Whatsapp voice gateway that will allow calls from your PBX to be sent through WhatsApp to the destination's WhatsApp number. We understand that you require a multi-channel solution, where you can either run multiple WhatsApp accounts with multiple phone numbers or use just one WhatsApp account with multiple calls. The choice of development platform/operating system is not crucial, and we can utilize platforms such as Asterix, Freeswitch, or FreePBX. Our proposed functional flow for the project is as follows: 1) Calls from the PBX/sip gateway will be routed to the WhatsApp gateway. 2) The WhatsApp gateway will convert the SIP protocol to WhatsApp protocol. 3) The code in the WhatsApp gateway will select an available account from the multi-channel WhatsApp accounts or one dedicated account, based on the requirements. 4) In case all WhatsApp accounts are occupied, the gateway will return "600 Busy Everywhere" or "503 Service Unavailable" error code. 5) If the called number does not have an associated WhatsApp account or is not used in WhatsApp, the gateway will return "503 Service Unavailable" error, and the call will be rerouted to alternative gateways. 6) The WhatsApp gateway will check if the called number has an associated WhatsApp account and if the number is online. If so, the call will be terminated on WhatsApp. 7) Once the call is successfully completed or if the called number does not answer, the call will be disconnected. 8) The system will return the appropriate SIP error code in case of a busy signal or no answer. 9) We will provide you with the source code and detailed explanations for future debugging purposes. We understand that you require an experienced and highly skilled freelancer to complete this project to a high standard. With our considerable experience in this domain, we are confident in our ability to meet your expectations and provide excellent communication throughout the project. Please note that the budget for this project is approximate, and we can provide a more accurate estimate once we have a

$2.700 USD in 45 giorni

5,0

(3 valutazioni)

5,8

@shubhi8982

Hello, I am Sourabh, an experienced freelancer with expertise in Android, C Programming, Mobile App Development, PHP and Python. I understand from your project description that you are looking for a freelancer to develop a WHATSAP to SIP Calling Gateway. My team has the necessary skills and experience to complete this project with high quality communication. We have worked on similar projects before and have provided our clients with excellent service. We will strive to provide the same level of service for you as we do for our other customers. Please feel free to reach out if you have any questions or would like more information about our services.

$2.250 USD in 7 giorni

4,7

(56 valutazioni)

6,3

@seron2116

Hello, I have extensive experience in developing SIP to WhatsApp gateways, specifically working with platforms like Asterisk, Freeswitch, and FreePBX. I understand the complexity of the multi-channel functionality and call error handling that you require. My proposed solution includes robust channel management and appropriate error code responses for efficient call rerouting. I am ready to discuss further details and work closely with you to ensure the project's success. Best regards.

$2.500 USD in 20 giorni

5,0

(3 valutazioni)

4,4

@KhalatyanArtur

Hello, my name is Artur and I am a web, mobile, and game developer with 18 years of experience in the industry. I have been working on many project across a wide range of platforms and I am confident that I can provide the best solution for your WHATSAPP to SIP Calling Gateway project. I understand that you are looking for a freelancer to develop a WHATSAPP to SIP Calling Gateway and that communication will primarily be through email. I am confident that my expertise in building interactive and dynamic websites using HTML, CSS, and JavaScript make me the perfect fit for this project as well as my proficiency in developing native mobile applications for iOS and Android using Swift, Kotlin, and Java. Additionally, I have a keen interest in developing games which is something that could be useful for this project as well.

$2.500 USD in 21 giorni

3,6

(3 valutazioni)

4,7

@REPLATechnology

Dear Client We understand your requirements and are confident in our ability to deliver a high-quality solution for the development of a WhatsApp to SIP Calling Gateway. Project Scope: Develop a SIP to WhatsApp voice gateway that can route calls from your PBX to WhatsApp. Implement the ability to send voice calls incoming over SIP and forward them through WhatsApp to complete the call on the destination's WhatsApp number. Create a multi-channel system that can accommodate multiple WhatsApp accounts and phone numbers. Enable the system to run multi-calls using multiple WhatsApp accounts or channels simultaneously. Ensure that the gateway returns appropriate SIP error codes to the backend based on the call status. Implement error codes such as CALL SUCCESS (200 OK), BUSY (486 Busy Here), UNAVAILABLE (503 Service Unavailable), etc. Develop a step-by-step functional flow that outlines how calls from PBX are converted and forwarded through WhatsApp. Our team has extensive experience in developing communication gateways and working with messaging APIs. We would be happy to provide you with references and discuss how our expertise aligns with your project needs. Best Regards

$2.750 USD in 18 giorni

5,0

(15 valutazioni)

2,8

@Alzahdy

Hello, my name is Omar, and I am an artificial intelligence engineer and a data scientist with more than 10 years of experience in programming. I understand that you are looking for a freelancer to develop a WhatsApp to SIP calling gateway, and I believe I am the perfect fit for this project. I have the necessary skills and experience to complete this project to your satisfaction with excellent communication. I understand that timeline is flexible for this project, so please let me know if you would like me to set my own timeline for its completion. My focus is always on providing quality work within deadlines so that you are not left waiting for any part of the project. Additionally, should you have any questions or concerns along the way, I am available to discuss any issues at any time so that you can be aware of progress being made on the project.

$2.000 USD in 15 giorni

4,9

(7 valutazioni)

2,5

@Sidrairfan078

Hi there, I hope you are good. I have read the brief details of your project. I have rich experience doing similar jobs from past few years regarding to these skills PHP, Python, C Programming, Mobile App Development and Android. You can check my portfolio as well: https://www.freelancer.com/u/Sidrairfan078 Lets start chat, So we could discuss it in detail and finalize the timeline and budget after discussing requirements. Thanks! Sidra

$1.650 USD in 8 giorni

5,0

(1 valutazione)

2,0

@MingW0323

Hello, my name is Ming and I am an experienced full-stack web engineer with a decade’s worth of experience in programming. I understand you are seeking assistance to accelerate growth and unlock the potential of your business to be more productive and profitable. With my tech stack and experience, I believe I can provide the best solution for your WHATSAPP to SIP Calling Gateway project. I am confident that my skillset, along with the project requirements, will enable me to complete the project to a high standard with excellent communication between all parties involved. Please don't hesitate to reach out if you want more information or would like me to send you any additional documentation or references related to this project.

$2.000 USD in 20 giorni

1,8

(1 valutazione)

0,6

@Saviourest

✌Hello, ✌ Okay I got what you want exactly. I just checked your project details ⭐WHATSAPP to SIP Calling Gateway⭐ and it matches my expertise. I absolutely love this job description. The first reason I love this job is because I can tell there is a lot of very technical tasks to do which I absolutely love. The second reason is that I have the required experience so I should be very comfortable with anything you throw at me. Let me know if we can discuss more. I can share my updated CV with you so you can decide. I 'd love to discuss more details with you. Best Regards. Dima

$2.500 USD in 6 giorni

5,0

(1 valutazione)

0,0

@imumermalik

Dear valued client, I hope this proposal finds you well. I have carefully reviewed the requirements for developing a WhatsApp to SIP Calling Gateway and I am confident that I can deliver a high-quality solution that meets your needs. To address your requirements, I propose creating a robust and efficient gateway that will seamlessly connect WhatsApp with your PBX system. Here's how I plan to solve your problem: 1. Development Approach: I will utilize my extensive experience in flutter and Laravel to develop a multi-channel gateway that can handle multiple WhatsApp accounts. This will allow for efficient handling of incoming calls and ensure that all calls are successfully routed. 2. Technology Stack: I will use industry-standard tools and frameworks such as Asterix, FreeSwitch, or FreePBX to build the gateway, ensuring compatibility with your existing systems. 3. Error Handling: The gateway will return the correct call error codes to the SIP backend, providing detailed information on the call status. This will enable the SIP Switch to try alternative routes for uninterrupted communication. 4. Scalability: The solution will be designed to handle a high volume of calls, with the ability to add additional WhatsApp accounts as needed. This will ensure that your communication needs are met, even as your business grows. 5. Testing and Quality Assurance: I believe in following best practices, which means not only writing code ...

$2.700 USD in 5 giorni

0,0

(0 valutazioni)

0,0

@solomiiahuliak

Hello Good evening! I am excited to submit my proposal for the "WHATSAPP to SIP Calling Gateway" position. I have developed a strong set of skills that make me confident in my ability to deliver high-quality work to your project. My approach to any project is to first gain a deep understanding of the client's needs and requirements. I will work closely with you to ensure that I understand your project goals and objectives, and that I am able to deliver results that meet or exceed your expectations. In terms of technical skills, I have extensive experience in Mobile App Development, PHP, Android, C Programming and Python. "503 Service Unavailable" Please send a message to discuss more regarding this project. With regards. ❤️Solomiia❤️

$2.500 USD in 3 giorni

0,0

(0 valutazioni)

0,0

@designkate2112

Hi, I've studied your proposal deeply. It seems that you're looking for a programmer who have rich experiences on PHP, Mobile App Development, Android, Python and C Programming. I've worked with another client in this space, I think you might find it very interesting to have chat. Regards, Kate

$1.500 USD in 10 giorni