VoIP, otherwise known as Voice over Internet Protocol, is a digital solution for telecommunication that utilizes the transmission of voice through the use of data over the internet. This technology is typically adopted for both commercial and privately used applications. VoIP developers specialize in programming telecommunication systems using data transmission to provide efficient services for audio and video functions.

VoIP developers are highly sought after professionals as they can create a versatile and advanced system for both desktop and mobile devices. This can include creating a more interactive experience for customers with multi-way calls, conference calls, video conferencing and voicemail systems. VoIP developers can set up your business’s phone system such as forwarding calls remotely to other devices with extensions or even communicating with customers utilizing software like Callcentric, Flowroute or Voxbone.

Here's some projects that our expert VoIP Developer made real:

  • Secured and configured private networks by implementing security measures like IP SLA, NAT and ACLs
  • Integrating SIP trunks between billing platforms, PBXs and VoIP applications
  • Setting up Postfix mail server on Linux systems with TLS authentication and encryption
  • Installing and configuring sip telephony software like ASTPP into businesses
  • Developing web applications that can send and receive SMS messages utilizing VoIP APIs

Our expert VoIP Developer have created numerous projects to help business owners manage their telecommunications in a professional bet. Our developer have an array of experience in creating a secure and reliable system customized to each client demands. If you're looking to improve or create your business’ communication system, then post your project today on Freelancer.com to hire one of our skilled professional VoIP Developers today!

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    23 najdenih del, po cenah EUR

    I'm in need of a skilled professional to configure my Fusion PBX system to implement direct call routing. Key Requirements: - The system is currently cloud-hosted. Prior experience with cloud-hosted PBXs is a plus. - I have between 1-10 phone numbers that need to be set up for direct routing. The ideal candidate for this project will have: - Relevant experience in configuring Fusion PBX systems. - Strong understanding of direct routing in PBX systems. - Prior experience with cloud-hosted PBX systems.

    €77 (Avg Bid)
    €77 Povprečna ponudba
    1 ponudb
    OpenSIPS VOIP System Enhancement 6 dni left
    VERIFICIRAN/A

    I am in need of an expert OpenSIPS VOIP Developer who can help create a robust system with high quality call routing. The main feature's to be implemented are NAT Handling in the Cloud, Microsoft Direct Routing, and Mid Registrar. The system should be designed to interact efficiently with PBX systems (FreeSWITCH) and OpenSIPS. Required Skills: - Extensive experience with OpenSIPS VOIP system development - Strong understanding of direct call routing - Proficiency in integrating VOIP systems with PBX and OpenSIPS - Familiarity with general telecoms concepts and technologies. The ideal freelancer should have worked on similar projects and be ready to showcase relevant examples in their proposal. If this project goes well, there could be more ongoing work. I look forward to discussing ...

    €22 / hr (Avg Bid)
    €22 / hr Povprečna ponudba
    6 ponudb

    I'm in need of a knowledgeable and experienced Asterisk expert for the implementation in our company We need an Asterisk specialist to help us set up a carousel of different numbers and provider accounts. The essence of the task, when calling, automatically should be substituted random number from our list. Details and scheme will be discussed individually

    €22 / hr (Avg Bid)
    €22 / hr Povprečna ponudba
    30 ponudb

    I'm in need of an experienced PBX / VOIP / SBC engineer who can address several issues with our customers phone systems system. The primary goal of this project is to troubleshoot and maintain current systems. Key Responsibilities: - Troubleshoot ongoing call quality issues - Investigate and resolve call drops - Address any connectivity problems Skills Required: - Extensive experience with Asterisk and other PBX systems - In-depth knowledge of VOIP network architecture - Proven track record in troubleshooting and maintenance Please only apply if you have a strong background in VOIP technologies and are confident in your ability to resolve issues.

    €20 / hr (Avg Bid)
    €20 / hr Povprečna ponudba
    16 ponudb

    I'm in need of a freelancer with expertise in setting up Virtual PBX systems and CRM integration, particularly with Vitiger CRM. The primary use of this system will be for sales and marketing purposes. Key responsibilities will include, but are not limited to: - Setting up a Virtual PBX system - Configuring Vitiger CRM - Integrating the Virtual PBX system with Vitiger CRM for seamless operation - Enabling predictive dialing for 4 separate campaigns - Ensuring a smooth and efficient workflow between the PBX and CRM for sales and marketing purposes. Ideal skills for this job include: - Proficiency in Virtual PBX systems - Extensive experience with Vitiger CRM - Previous work with predictive dialing configurations - Strong understanding of sales and marketing processes - Excellent pro...

    €16 / hr (Avg Bid)
    €16 / hr Povprečna ponudba
    5 ponudb
    Asterisk Dev for Custom PBX System 5 dni left
    VERIFICIRAN/A

    I'm seeking a proficient Asterisk developer who can build a custom PBX system with Issabela or something comparable. The PBX system requirements are as follows: - Less than 10 extensions. - Features such as call recording, auto-attendant, and call routing. - Compatible with VoIP phone lines. Ideal candidate should possess a deep expertise in Asterisk and a good understanding of VoIP technology. Knowledge of Issabela or similar software is an added advantage. Let's connect if you can guarantee a seamless and efficient communication system. For more information, sent the requerimients - The calls received would be answered by several receptionists who would log in/unlog in with their landline to receive the call. If there are more calls than receptionists, a message will appear ind...

    €1281 (Avg Bid)
    €1281 Povprečna ponudba
    33 ponudb

    As a rapidly expanding company providing business VOIP services, I'm seeking a professional experienced in selling VOIP solutions to small businesses. I believe that your experience and skills will deliver the results we anticipate. Key requirements: - Deep understanding and experience with VOIP services, particularly with features such as auto attendant, call recording and conference calling. - Proven track record in successfully targeting and selling to small businesses. This project requires a focused and accountable professional who can think strategically about our service offerings and can execute a sales strategy effectively. Your work will play a crucial role in expanding our customer base. If your experience aligns with these requirements, I look forward to reading your ...

    €446 (Avg Bid)
    €446 Povprečna ponudba
    18 ponudb
    Custom PBX System for Company 4 dni left
    VERIFICIRAN/A

    I need a PBX system tailored for a small company with one to five phone lines or extensions. I also need to customize the caller ID. Key requirements are: - Building a PBX system for 1-5 phone lines/extensions. - Customizing the caller ID. Though the specific customization features for the caller ID were not mentioned, I'm expecting the ability to at least change caller names, formats, and add additional information. The system should be easy to use, reliable, and have room for expansion as my business grows. Please only apply if you have prior experience in developing PBX systems.

    €120 (Avg Bid)
    €120 Povprečna ponudba
    21 ponudb

    As a sysadmin developer, I'm in need of an asterisk specialist to build a Docker Compose script or a bash script for an interactive vocal server. This project is multifaceted, carrying out outbound calls and saving responses in a database. Key responsibilities are: * Creation of an Interactive voice response (IVR) system. * Outbound calling function connected with my API for automated scheduling of phone calls. * MySQL database integration to securely store the recorded responses. For this assignment, it would be ideal if you have proficiency in using Asterisk, Docker Compose, API integration along with comprehensive database management skills It would be a cherry on top if you have prior experience constructing interactive vocal servers. Let's connect to discuss the next s...

    €284 (Avg Bid)
    €284 Povprečna ponudba
    9 ponudb
    Cisco Switches (VLAN Mgmt) 4 dni left
    VERIFICIRAN/A

    Check existing config. Create VLANs, IDs and name tag based on the existing design. Configure and test Device. Then move onto the next VLAN and so on. Both Console and Web interface available. Trunk Ports required for new APs. Switches will include Stackable Sg350x. I also have a number of HP Procurves but not to worry if these are not possible.

    €77 (Avg Bid)
    €77 Povprečna ponudba
    19 ponudb
    Cisco Switch Tasks 4 dni left
    VERIFICIRAN/A

    Cisco SG350x Health check. Pull out an audit. Currently unplugged. Needs approval before we put it back online. Copy same config as the others on the same VLANs are working.

    €117 (Avg Bid)
    €117 Povprečna ponudba
    12 ponudb

    I'm looking for a professional who can install Asterisk PBX to facilitate a call routing system. Key Requirements: - Asterisk PBX will function primarily as a call router, modifying incoming caller ID's to the outgoing trunk DIDs. - The system should handle both incoming and outgoing calls efficiently. - The endpoint devices that will connect to the Asterisk PBX are Mobile Operator issued SIP trunks. Ideal Skills and Experience: - Prior experience in setting up and configuring Asterisk PBX systems is essential. - Proficiency in handling and routing calls effectively. - Knowledge of SIP trunks and mobile operators' systems would be a plus. Specific Requirements Requirement: A simple Asterisk PBX installed on our server. It is a voice transit facility with incoming and outg...

    €41 (Avg Bid)
    €41 Povprečna ponudba
    9 ponudb

    We have a VoIP app in flutter, voice calling with sip and FCM setup for the push notifications, we like to have a call alert like WhatsApp calling alert that can handle both foreground and background states in Android and iOS. If somebody already worked on this type of feature, bid and connect to show a demo.

    €33 (Avg Bid)
    €33 Povprečna ponudba
    4 ponudb

    I have Patton Smartnode which gets SIP line in (works) and needs to output to its 4 BRI ports to connect to classic PBX (Avaya IP Office 500). SIP line works BRI Configuration to connect Patton and PBX not, this is where i need help for.

    €30 (Avg Bid)
    €30 Povprečna ponudba
    5 ponudb

    I'm searching for experienced professionals in the VoIP/PBX or communication field. The project is tailored towards a new enterprise that will initially have 11-50 users. Ideal Candidate: - Proficient in setting up VoIP/PBX systems - Prior experience in handling internal communication systems - Able to scale systems for growth - Familiarity with providing solutions that are cost-effective for new businesses Key Requirements: - Develop a reliable internal communication system - Ensure seamless functionality for 11-50 users - Set up the system in a way that allows for easy expansion in the future - Provide clear documentation for future maintenance and troubleshooting - Cost-effective solutions will be prioritized

    €413 (Avg Bid)
    €413 Povprečna ponudba
    30 ponudb

    I'm looking for someone experienced with Asterisk to help me set up a SIP server for educational and testing purposes. The SIP server will be used with a Jio SIP trunk. Key requirements: - Configure Asterisk as a SIP server on the operating system of your choice - Set up a Jio SIP trunk - Create a demonstration of simple dialing using an open source SIP client Ideal skills and experience for this project: - Proficient in Asterisk server configuration - Experience with setting up SIP trunks - Strong knowledge of open source SIP clients - Good communication skills to help guide me through the setup and demonstration process. My budget is not very high ..

    €97 (Avg Bid)
    €97 Povprečna ponudba
    8 ponudb

    We have a VoIP app in flutter, voice calling with sip and fcm setup for the push notifications, we like to have a call alert like whatsapp calling alert that can handle both foreground and background states in Android and iOS. If somebody already worked on this type of feature, bid and connect to show a demo.

    €52 (Avg Bid)
    €52 Povprečna ponudba
    9 ponudb
    PHP Code Debugging for Server-Side 1 dan left
    VERIFICIRAN/A

    When importing customers via CSV file in ASTPP version 6.0, both postpaid and prepaid customers balance always uploads 0. The task is to find the corresponding php file/path on the server and correct it, so that the balance uploads correctly when uploading the customers on the ASTPP both for prepaid and postpaid customers. Positive balance must upload as positive balance. Negative balance must upload correspondingly. 0 uploads 0. You need to make a detailed document how to do that on any ASTPP server, so that someone without technical knowledge takes the document, follows it and gets the same working on the other ASTPP server. Example of the document: Someone from our side will try to upload customers on the provided server to make sure it works, if yes, then we will take your document, w...

    €40 (Avg Bid)
    €40 Povprečna ponudba
    17 ponudb

    I'm in need of a freelancer with expertise in setting up Virtual PBX systems and CRM integration, particularly with Vitiger CRM. The primary use of this system will be for sales and marketing purposes. Key responsibilities will include, but are not limited to: - Setting up a Virtual PBX system - Configuring Vitiger CRM - Integrating the Virtual PBX system with Vitiger CRM for seamless operation - Enabling predictive dialing for 4 separate campaigns - Ensuring a smooth and efficient workflow between the PBX and CRM for sales and marketing purposes. Ideal skills for this job include: - Proficiency in Virtual PBX systems - Extensive experience with Vitiger CRM - Previous work with predictive dialing configurations - Strong understanding of sales and marketing processes - Excellent pro...

    €5 / hr (Avg Bid)
    €5 / hr Povprečna ponudba
    7 ponudb
    FreePBX SIP Trunking Setup 1 dan left
    VERIFICIRAN/A

    I'm looking for someone to help me set up a SIP trunk on my FreePBX phone system. Key Requirements: - Configuration of SIP trunking: I need you to assist in the setup of a SIP trunk on my FreePBX system. Your expertise in this area is crucial. - Connecting to a specific SIP trunk provider: I have a specific SIP trunk provider in mind, and I need you to ensure that the FreePBX system is correctly connected to this provider. Ideal Skills and Experience: - Proven experience with FreePBX phone systems and SIP trunking: I'm looking for someone who has successfully configured SIP trunking on FreePBX systems before. Please provide examples of similar work. - Familiarity with various SIP trunking providers: Your knowledge of different SIP trunking providers will be useful to ensure ...

    €458 (Avg Bid)
    €458 Povprečna ponudba
    21 ponudb

    I'm seeking a highly-skilled Asterisk VoIP specialist for a unique project. I require expertise in Asterisk integration, VoIP configuration, and particularly in IVR implementation. KEY REQUIREMENTS: - Asterisk Integration: Full integration set up and testing needs to be completed. - VoIP Configuration: This includes configuring phone lines, extensions, and all essential VoIP functions. - IVR Implementation: The main purpose of this project is the implementation of automated IVR menus. This needs to be user-friendly and functional. The system should be capable of handling less than 50 concurrent calls. IDEAL CANDIDATE: The successful freelancer must have outstanding experience in all mentioned areas with a focus on IVR implementation. Any proven record in developing low-volume Ast...

    €202 (Avg Bid)
    €202 Povprečna ponudba
    14 ponudb
    Cisco Packet Tracer Laboratorio 1 dan left
    VERIFICIRAN/A

    Laboratorio sobre cisco packet tracer simular una topologia

    €26 (Avg Bid)
    €26 Povprečna ponudba
    15 ponudb

    I am in urgent need of an Asterisk developer who can work efficiently on debugging and troubleshooting. Key Tasks: - Fix call dropouts - Resolve audio quality issues - Correct failed call routing The ideal candidate for this project should have: - Strong knowledge of SIP protocols - Experience with Asterisk dial plans - Familiarity with debugging tools and logs Only developers well-versed in these areas need to apply. Achieving solid results in a timely manner is of the essence.

    €18 / hr (Avg Bid)
    €18 / hr Povprečna ponudba
    2 ponudb

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