Last seen: Jul 25, 2014 9:12 AM EDT
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VoIP, Asterisk, Kamailio guru, 25+ years programming experience

Username: ivan381eu

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Location: Belgrade, Serbia

Member since: January 2011



(46 reviews)

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1 user has recommended this freelancer.

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My projects:

  • €4797.00 EUR
    Profile image for Seller DavidLifson


    Apr 1, 2014

    Ivan is a pleasure to work with. Communication is very important and Ivan understands that this essential to the success of a project. He ask questions when appropriate and communicates his progress.<br/>

    Project Description:Develop a telephony application in PHP based upon Asterisk
  • €355.00 EUR
    Profile image for Seller telef


    Feb 9, 2014


    Project Description:Make enchancements of earlier very nicely done project.
  • $350.00 USD
    Profile image for Seller mattl


    Feb 8, 2014

    since completing this project I have done 2 others with him. I really enjoy working with a developer who does not stop at any obstacle. Thanks Ivan!

    Project Description:We need to customize the vici import utility so that it reads the areacode prefix from another table we established and writes back to vici_list table the city,state,address,county,zipcode details. We...
  • [Sealed]
    Profile image for Seller DavidLifson


    Feb 5, 2014

    This guy is great. He has excellent knowledge and does not bullshit. I would highly recommend him for your project unless he is doing another one for me!<br/>

    Project Description:We want to develop a very sophisticated web based UI for Asterisk as well as customize the software itself to fit our purpose. We are looking for a serious programmer who can take the lead on this multi-faceted development project...
  • $219.00 USD
    Profile image for Seller cconroy


    Nov 7, 2013

    Ivan continues to impress me in the knowledge and skill that he has. He is upfront clear and ther is no misunderstanding. Working with Ivan allows me to assign tasks and know that they will be completed without having to follow up. Target dates are met and timelines are provided.

    Project Description:Please assist in integrating the A2Billing into a Web Portal. More work to come but this will allow us to start VoIP billing. More VoIP work will be needed.
  • $900.00 USD
    Profile image for Seller kam303


    Nov 5, 2013

    Project was executed excellently, and in line with project description, very pleased with results and with Ivan's willingness to go beyond what is required and help with what ever he can. Look forward to working with him on future projects.

    Project Description:We require a linux based Dialler, requirements are 1. Must be able to load unlimited amount of numbers on to the system - which can be separated by ranges. 2. Ability to make numerous simultaneous calls, can be defined with in the application...
  • €111.00 EUR
    Profile image for Seller kam303


    Nov 5, 2013

    Tribox patches were purchased for a server 6 months ago, since then I have had no security breaches, so I decided to install them on my latest server as well. Patches were installed quickly, and on short notice. Very happy with service, and look forward to continuing our work together for future projects

    Project Description:Install Trixbox patches to remove default settings in order to avoid hackers to abuse Trixbox VoIP trunks.
  • $1700.00 USD
    Profile image for Seller teddybryan


    Nov 1, 2013

    Undoubtedly,, Ivan is the personnel you need for any VoIP embedded with security. His passion is Help people with VoIP and Security project. Ask him anything and you will have an answer

    Project Description:Hello Ivan, I am launching a new service. VoIP and I nned a website built and asterisl+a2billing setup. ling the user login to the website, as usual where they can reload account, check CDR and more. ...
  • $600.00 USD
    Profile image for Seller freerateupdate


    Aug 29, 2013

    Ivan is a hard working person.<br/>

    Project Description:php programming
  • $275.00 USD
    Profile image for Seller telef


    Aug 29, 2013

    Great once again!<br/>

    Project Description:Follow up project: *adding forwardfunction *adding further apirequests *adding gateway function
    ivan381eu has not completed any projects.
  • $35 USD/hr In Progress

    Upgrading asterisk with new features

  • $16 USD/hr In Progress

    as discussed previously - various sys admin and maintenance tasks.

  • $20 USD/hr In Progress

    Looking for Asterisk Engineers to provide remote (SSH) Tier-3 support to our customer base. Must have a thorough understanding of the OSI model and be comfortable working from the CLI.Knowledge of DRBD, Heartbeat, Queuemetrics, Vicidial a plus.

  • $250 USD May 30, 2014

    I have asterisk 1.6 running on Ubuntu 12.0. Asterisk is connected to gsm gateway via sip. Recently, they offered here in Lebanon premium numbers. These numbers cost a lot of money to call. The problem is that they have no certain pattern or range and I do not want asterisk to call these numbers. When asterisk dial a premium number, an ivr message alert about the rate cost and give the option to hangup at no charge before it start ringing, so there was no answer during the ivr. So I want asterisk to hangup when it hears the ivr.

  • $10 USD Feb 26, 2014

    We are looking a opensips and freeswitch expert for a specifically project. Do you have enough time to discuss project details ?Project is like that; timely opening ports on freeswitch shall send port available and time period (sec.) to open sips and ur billing-proxy server will send all calls to open sips. Opensips will manage all thess calls as available ports on frees with also freeswitch side need some arrangements for this plan. Will been shared after agreed on other parts.

  • $40 USD/hr Feb 6, 2014

    VICIdial-Asterisk-Service&SupportAsterisk | Vicidial | Goautodial |VicidialNow | Osdial | Freepbx|Vicidial installation , Configuration & support .Vicidial Onsite server installation & Hosted server installationConfiguring Digium & Sangoma cards in Asteirsk & Vicidial .Asterisk with Freepbx installation and supportSpecialtiesSoftware Development, Server Management(Windows & Linux),Network Management,Configure DHCP,port forwarding etc for Windows & linux networks.Dialer Technical Support with VoIP Server Technical Support (All types of VoIP devices), VoIP Minutes Re seller with dialer.Social skills: excellent in team, individual,on-site or remotely, relaxed or under stress.Organizational skills: excellent with analyst duties,alone or in team,with project manager duties,with self-managed time or with magnetic badge.Opendra Singh chauhan’s ExperienceAsterisk Based Call Centre SolutionAsterisk based call centre solution, PBX , Voice Logger , Calling Card ServerJanuary 2013 – Present (9 months) Jaipur Area, IndiaI&quot;m Asterisk service provider, I&quot;m leader in providing turnkey solutions in Asterisk..o International call Center Predictive Dialero Domestic call Center Predictive Dialero Voice Broadcasting Softwareo Private Branch eXchange (PBX)o Customer relationship management (CRM)o interactive voice response (IVR)o Voice loggero Virtual call Centerso Auto Dialerso Customer Survey Softwareo Telecommuting Software• A technology driven professional with over 3+ years of rich cross cultural experience in the areas of Telecom and Software development, Software Integration, (PBX) Implementation, VOIP and software based PBX solutions and Application Development, Maintenance & Support.• PBX Implementation (Asterisk Open source PBX) including 50 successful Asterisk Implementation and support to more than 15 clients for the same.• Di-Logic technology Implementation & customization including 3 successful completions of projects with different clients.• Proficient in implementing Software based IP-PBX systems. Good understanding of issues and technologies associated with applying complex software solutions in a multi-campus environment.• Expert in configuring and maintaining SIP based server and SIP registrant, redirect server.• Specialized in collecting information from User/Client/Management by asking questionnaires to understand their requirement and providing the appropriate solution and for VOIP technology.• Having Good Knowledge on Linux Commands and Administration.• Good Understanding of VOIP, PRI, E1, T1, SIP, IAX protocols and implementation.• Good Understand IN OPENSER, KAMAILIO Like SIP based Registrant server.• Successful Implemented VICIDIAL, ELASTIX, A2BILLING like system as consultancy work.• More Than 15 Successful IVRS like system or PBX Implementation with 3 or more clients as consultancy work.• Expertise in ZAPTEL, DAHDI, Asterisk Implementation and Integration To any call center or contact center environment.

  • $405 USD Jan 29, 2014

    My website needs a captivating and well organized order page with a field for coupon code and here are other things that I need done:-2. Contact Page3. Access Number Page4. UK/USA Rate Page5. Update dialplan (So that customer will be charge different rate depending on destination and feature used, e.g Call Recording and Spoof)I have the excel file6. On the Add Balance Page( I need a reminder for the customer to provide address in the “Edit Profile” page if the address is not complete).The website is

  • $40 USD Jan 26, 2014

    I have a server that is in need of some sort of cdr reports or software installed. I need a program that will track calls of certain users on the system and allow them to log into the system and look at the details for predefined users from their specific company. it appears that CDR-Stats will do this but you may know of something better? i tried to install but am getting an &quot;internal server error&quot; on the webpage. unfortunately that all i can do and was hoping you can figure this out or reinstall and get it working? i know this shouldn&quot;t take long for a guru, so i figure an hour.

  • €406 EUR Jan 14, 2014

    Hi Ivan, nice to say hello. I hope to explain our needs well because my English is very poor but I read it perfectly. It&quot;s the first time I go to this web.We are a company from Spain is looking for programmers to create a platform for management and billing solution Kamailio + Asterisk. We have experience in Asterisk, Kamailio walking in (but are studying hard). Basically what we need is to work with an interface (eg PHP) to work on databases Kamailio / Asterisk.At this point you will have to help me because you have extensive experience in the subject. The billing is in Kamailio or Asterisk? We do not want something very complex and elaborate. We would like to create &quot;peers&quot;, edit customer information, automatic billing invoices historic.Ivan Ultimately, we need a tool to start a VoIP provider. We thought instlar Kamailio, although we are not specialists, to mount a more scalable solcuión home. We are a small company you do not aspire to have thousands of customers, perhaps our target customers are about 1000. Does instlación of Kamailio to think that number of customers necessary?

  • $350 USD Nov 11, 2013

    I am looking for consultant to implement an asterisk based solution.

  • $500 USD Nov 5, 2013

    I need to be able to respond to an email via a phone call. When the email has been received, I need the system to look at the email and take the phone number in the subject line and use that number to make a phone call using our Asterisk FreePBX system to make the call. Is this something you can do?

  • $406 USD Oct 8, 2013

    Hello, I need Customized GUI for Asterisk IAX2 Trunking with Just few options such as Call Details Record(CDR) &amp; bottom of the CDR Page must be appear/show ASR, ACD &amp; Total Min, Active Calls of the Trunk, SIP IP Add option for receive incoming call from any softswitch (e.g- VOS3000, VoipSwitch, MVTS, iTelSwitch etc.) &amp; that GUI must be comfortable with Asterisk versions 1.8, 10, 11.2 etc. Thanks for your attention .

  • $100 USD Sep 25, 2013

    Hi,I have an Asterisk server which has a public IP address (runs on an OpenVZ VM on a machine I own in a datacenter). I also have my private network here at home with more than one VoIP device which must communicate with Asterisk through a firewall which uses NAT. For that reason, I use siproxd on my firewall (it&quot;s a pfsense machine). My problem is twofold: 1) After a couple of hours, incoming calls will not make it to the internal VoIP clients. I need reliability here. 2) When a call is set up (either incoming or outgoing), it takes up to 4 seconds before bidirectional audio is established.The job is to troubleshoot both of these problems. I set these systems up myself and have general knowledge of how it all works, but I feel I&quot;ve gotten to a point where a very thorough knowledge of SIP and RTP is necessary and I just don&quot;t have the time to learn and troubleshoot it myself right now.If you accept the job, I&quot;ll set up a screen-sharing app and open up ssh connections to my asterisk box, ssh and browser to my firewall, and also a web browser to my PAP2 VoIP box. You can have control to do whatever you need to do, and I will work with you to get you whatever you need to get the job done.

  • $150 USD Sep 19, 2013

    im getting 999 999 9999 ph calls and I want to know who it is I dont know what the project is worth or if your interested

  • $10 USD Sep 8, 2013

    hello, i have a standard base vicidial server, and i need few customization&quot;s,change agent interface, add about 3 different reporting options as well. also i need some assistance with groupslets talk price in chat or skype

  • $200 USD Aug 29, 2013

    Hi,Please let me know if you know how to setup VoIP Bandwidth Optimization For VOIP GSM Gateway ..which can save the Bandwidth..nnThanks

  • $300 USD Aug 23, 2013

    I have AsteriskNOW 3.0.0 installed on a computer box withn. FreePBX 2x,FXO, 2x FXS n. TDM410P PCI cardn. Using dahdi etc.nI need some one to configure the box so that all the services worknOther functions would be Call recording, CallerID, Voice mail, mysql integration for call logging, SIP/VOIP integrationn. The existing box is loaded with the PCI card, FreePBX (on CentOS) with most modules updated.n. Port 22 can be made availablennThanksn

  • $200 USD Aug 7, 2013

    Integration of the Asterix PBX into the bespoke CRM system for incoming and outgoing phone calls

  • $100 USD Jul 26, 2013

  • $220 USD Jul 23, 2013

    Hello,We need a good developer for Asterisk (Open Source) Install & Configuration on our VPS server.We will provide our all SIP information Simply you just need to install it and just simple configure it..If you have knowledge about asterisk please feel free to contact us.Thanks.

  • $100 USD Jul 9, 2013

    I want to setup a freepbx server with a virtual pri I already own I pay a monthly fee on the did is from Dominican Repbulic. I want users in Dom. Rep. to call the did and get a callback with a disa to the US. how much can you do this for and do I need anything else besides the virtual pri did and the vps i already have.

  • $16 USD/hr May 3, 2013

    Job DescriptionI have a dedicated server and need someone to administer it for me. It is on GoGrid. The purpose of the server will be to host our Xcart websites . I need someone with server experience to do the following:1.Monitor sites effectively2. Work with or MailXchange Server3. Linux System Administration experience4. Configure server security and ensure performance is optimalContractor requirementsI am looking for a contractor that has the following skills:1. Prior experience in setting up and configuring servers, especially with MySQL2. Ability to explain recommendations clearly and with details on costs and benefitsI will need you to be available during US business hours for the discussions with me, but you can otherwise work on your own time.My current sysadmin is leaving us for full time work and he will be giving you details.How to applyPlease respond with a cover letter that includes the following:1. Your background in sysAdmin, and how much time you&quot;ve spent in Xcart/MySQL2. a portfolio of your work with particular emphasis on transferable skills to X Cart Ecommerce.Job ID: 41051049Desired SkillsMySQL Administration, PHP, Linux Server Administration, Mail Server Administration

  • $262 USD Apr 24, 2013

    I need someone to make a cURL project for me. Need to take some information from my website in the same time my customers browse it.

    ivan381eu does not have any open projects.
    ivan381eu does not have any work in progress.
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VoIP Consultant

Oct 2010 - Apr 2012 (1 year)

Morodo UK

- VoIP cluster monitoring, traffic over 10k+ minutes monthly,<br />- Project Management (VoIP Call back solution, DID traffic failover improvement),<br />- Consulting (Advice on new and existing, voice and video services)

Project Manager

Sep 2007 - Jul 2010 (2 years)

VoIP Balkan

- SIP server monitoring system,<br />- SIP server adaption for communication via H.323 protocol<br />- Ministry of Foreign Affairs of the Republic of Serbia - autonomous telecommunication system (numeration indepedent from local Telco, interoperability with Siemens, Avaya, Panasonic PBXs via ISDN PRI),<br />- VoIP call back solution (PSTN & GSM to VoIP)<br />- Centralized monitoring system for 50+ Asterisk IP PBX installations,<br />- Asterisk based Call center solution design,<br />- Asterisk IP PBX customized solutions,<br />- Mass


University of Belgrade - Faculty of Mathematics



Red Hat Certified Security Specialist (RHCSS)

Red Hat

An RHCSS certification may be earned by a Red Hat Certified Engineer (RHCE) who has demonstrated deeper capabilities in networking services security, directory services, authentication, and SELinux policy management. An IT professional who earns an RHCSS certification has met the security requirements for today's enterprise environment.


IT weekly "COM"

Info Home, Serbia EU

During the 5 years period I published number of articles about Linux, Web services, VoIP security, Asterisk appliances, Kamailio SIP proxy, MySQL clustering etc.