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!

From 29,553 reviews, clients rate our VoIP Developers 4.85 out of 5 stars.
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    18 jobs found, pricing in USD

    I am looking for a skilled freelancer who is proficient in FusionPBX, with a specific focus on enhancing our call routing and VoIP settings. FusionPBX is now installed and ready. However, I need to address some issues and make necessary configurations, including SIP Trunk settings, adjustments to display incoming numbers, and real-time listening capabilities (using mod_event_socket and the Event Socket Library), among others. **Key Requirements:** - Expertise in FusionPBX setup and configuration - Ability to implement efficient call forwarding and call transfer systems **Project Objectives:** - Configure FusionPBX to streamline our call routing processes - Optimize VoIP settings for improved call quality and reliability - Implement call forwarding and transfer functionalities to ensure...

    $22 / hr (Avg Bid)
    $22 / hr Avg Bid
    16 bids

    In the search for an experienced developer, I require a web2call application based on Asterisk. This web2call should focus on enabling international call capabilities. Specifically, the created application should run adeptly on Linux platform systems. Additionally, the application needs to support one-on-one call functionality for its users. Hence, any freelancer bidding on this project should preferably have: - Proficiency in Asterisk software - Experience with building web2call applications - Knowledge of Linux platform compatibility issues - A background in creating systems for making international calls Your understanding of one-on-one call functionality support will be highly valued in this project. This project will be a significant contribution to connecting people across the glo...

    $353 (Avg Bid)
    $353 Avg Bid
    6 bids

    I am venturing into setting up a VoIP Service Provider Platform (Teleman) with my own server and domain. This platform will be targeted to provide both international and local call services. Here's what I'm looking for: Key Features Desired: • International and local Call functionality • International phone number support • Call forwarding The ideal freelancer for this project should have experience setting up VoIP platforms (Teleman) with the above-mentioned features before and be knowledgeable in international call support systems.

    $517 (Avg Bid)
    $517 Avg Bid
    20 bids

    I require a specialist to design a comprehensive voice messaging system. The software should enable the sending of pre-recorded messages to phones within England, based on the call minutes of another company. This project necessitates the inclusion of group messaging capabilities, allowing me to send bulk messages effortlessly. Ideal functionalities include: - An easy-to-use system for individuals - Enable users to compose voice messages using IVR prompts. - Implement options for users to review and edit their messages before sending. - Provide IVR prompts for users to customize group settings, such as group names and notification preferences. - Integrate group selection options into the IVR menu for message composition. - Enable users to navigate through their groups using voice commands...

    $670 (Avg Bid)
    $670 Avg Bid
    51 bids

    I'm searching for a proficient SIP/Asterisk engineer who has ample experience in performing the following tasks: - Setting up and configuring an Asterisk server - Ensuring that the server is set up for high security and can support telemarketing or sales calls - Adding a specific function of calling and spoofing numbers, to be used exclusively for telemarketing and sales purposes Ideal skills and experience for the job: - Extensive experience with Asterisk and SIP protocols - Past-experience in setting up IVR systems - Understanding of server security measures - Familiarity with telemarketing systems Please provide a summary of your relevant work experience and your approach to this task in your bid.

    $634 (Avg Bid)
    $634 Avg Bid
    16 bids

    I need a USA non-VoIP number for personal use on WhatsApp. - Key Features Needed: • Call forwarding • SMS capabilities I anticipate using this number for over three months. The service provider should be in a position to provide long-term support with respect to these features. Ideal freelancers for this job would be those who have experience in setting up and providing such services, specifically with non-VoIP numbers for communication apps like WhatsApp. You should also be familiar with, or able to troubleshoot any potential technical issues that may arise during the span of time I will be using the number.

    $10 (Avg Bid)
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    3 bids

    I am in need of an Intermediate level call center agent who is perfectly bilingual in English and Spanish for my business. This job will involve various tasks and responsibilities which comprise: - Customer support: Assisting customers with their queries or issues and providing prompt solutions. - Sales calls: Making outbound calls to potential customers, sharing product details, and closing sales. - Technical support: Helping customers with technical issues related to our products or services. The ideal candidate should be proficient in handling both inbound and outbound calls. A previous experience in a similar position will be a bonus. This role requires seamless communication skills and a service-oriented approach. This is a fantastic opportunity for someone who wants to grow their ...

    $6 / hr (Avg Bid)
    $6 / hr Avg Bid
    9 bids

    I'm searching for a network security expert to assist in diagnosing a problem with my SIP ALG settings on my Cisco ASA5506 firewall. It's crucial because I am experiencing an issue wherein the phone rings for one second and then cuts off. Your tasks will include: - Examining the SIP ALG status on my firewall. - Troubleshooting any issues found and offering solutions to rectify them. - Implementing the solution with my approval. Relevant Skills and Experience: - Proven experience with Cisco ASA5506 firewalls. - Deep understanding of network security. - Skills in VoIP technologies and SIP ALG. - Familiarity with various VoIP service providers/software is a plus. Please note, we are not currently using Skype for Business or Ring Central, but a different provider/software. Your d...

    $199 (Avg Bid)
    $199 Avg Bid
    18 bids

    Currently I have a problem where the VOS3000 cannot be used with the topology in the picture I attached. 1. NIC Card 1 (IP ) Is the IP of the Leased Line that leads to the VOS in the Data Center. 2. NIC Card 2 (IP ) Is the IP of the Customer Router which is connected to the Customer IP Pbx. Currently VOS is installed on IP and the connection can be used to make outbound calls to the VOS3000 in the data center. when the customer makes a call via the IP segment on NIC Card 2 () via the Customer's IP Pbx (IP ) the call is immediately disconnected and there is no login on the VOS3000. Can you help me so that customers can make calls on NIC Card 2 in their IP Pbx Segment. Thank you very much

    $29 (Avg Bid)
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    5 bids

    I am seeking a skilled IT professional to create a secure, reliable network allowing remote access to my PreSonus StudioLive 32 Series 3 digital audio mixer for live audio mixing purposes. This will facilitate real-time control and adjustments from any location, ensuring high-quality sound production for live events remotely. **Requirements:** - **VPN Configuration:** Set up a Virtual Private Network (VPN) to securely connect to the local network where the mixer is connected. Experience with VPN technology and security protocols is essential. - **Network Accessibility:** Ensure the network is configured for optimal performance and reliability, allowing for seamless live audio mixing remotely. - **Compatibility Checking:** Assess and ensure compatibility between the network setup and the ...

    $252 (Avg Bid)
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    4 bids
    Free pbx Setup remote phones 1 day left
    VERIFIED

    We have a free pbx box and the phones work but we cannot get a phone to work outside of the network. We need help setting that up.

    $152 (Avg Bid)
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    35 bids

    Hello Asterisk Developer - Engineer - Tech, 1. I need an Asterisk auto-attendant - IVR with a TTS text-to-speach greeting generator - plugin. Canned greetings are so last century - customers want tailored greetings in a life-like male and female voice.2. No cumbersome GUI to handle this. I currently have a GUI running my Asterisk Voicemail that is over 10 years old...simple, liteweight and has what I need.3. If you are not experienced with Asterisk, you probably should not you.

    $1286 (Avg Bid)
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    10 bids
    Sigtran access 11 hours left
    VERIFIED

    I need sigtran access for hlr lookup i need sctp access

    $145 (Avg Bid)
    $145 Avg Bid
    9 bids

    I'm seeking an expert Android developer to create a VoIP app with GSM integration. This project includes, but is not limited to: - Developing an app for calling and text messaging through a SIP server, inclusive of delivery reports. - Implementing features such as call recording and instant messaging. - Ensuring compatibility with older Android versions. Since I don't have a preferred SIP server, your input and recommendations would be highly valued. Experience with SIP servers and a strong understanding of both VoIP principles and Android development are necessary for this project. Your role will be pivotal in guiding the selection and integration of the SIP server. Please consider the above requirements when placing your bid.

    $246 (Avg Bid)
    $246 Avg Bid
    37 bids
    Wireguard VPN Setup for Mobiles 6 hours left
    VERIFIED

    I am in need of an expert in firmware NAT network VPN, specifically skilled in using Wireguard, to set up a server and establish a VPN tunnel. The aim is to ensure secure data transmission by directing all mobile phone traffic through this tunnel. What I Require: - A shared VPN tunnel setup for all mobile devices. - Competence in - The task only involves setup and installation of the Wireguard VPN system. Regular updates, maintenance or dealing with technical difficulties will not be required. - A strong background in firmware NAT network VPN This project requires someone with profound knowledge of VPN and excellent problem-solving skills in order to address the unique challenges this setup might present. If this sounds like you, please place your bid. Your extensive experience with ...

    $77 (Avg Bid)
    $77 Avg Bid
    17 bids

    I'm currently experiencing an issue with my VoIP phone system where all incoming calls are being dropped after just 2 rings. I'm using FreePBX. The issue persists with all incoming calls without any exception. Here's what I need: - Diagnose the existing problem within the FreePBX system - Troubleshoot and offer a definitive solution to the dropped calls Ideal Skills and Experience: - Expert level knowledge in VoIP Systems - Proven experience with handling issues related to FreePBX - Strong troubleshooting skills and ability to quickly diagnose problems - Solid expertise in telephony systems - Preferably certified in VoIP related technologies If you are the guru I am looking for, I would appreciate your bid on this project. Can't wait to have my system back up, runn...

    $28 (Avg Bid)
    $28 Avg Bid
    9 bids

    Requiero la instalación y configuración de Festival y Cepstral en varias voces en español, así como hacer la configuración necesaria para que las grabaciones que se están grabando en WAV se graben en wav, todo lo anterior en asterisk 11.25 en Issabel.

    $200 (Avg Bid)
    $200 Avg Bid
    7 bids

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