SIP Freelancers

Showing 37 freelancers

SIP Freelancers

Showing 37 freelancers

  • VoIP and Linux Engineer

    Hi. I'm a VoIP engineer, mostly using Asterisk and FreeSwitch. Also have a huge expirience in traditional telephony, also Video-Conferencing systems (Polycom, Tandberg). Excellence knowlege of SIP/H.323 and TCP-IP networking. … more

    Hi. I'm a VoIP engineer, mostly using Asterisk and FreeSwitch. Also have a huge expirience in traditional telephony, also Video-Conferencing systems (Polycom, Tandberg). Excellence knowlege of SIP/H.323 and TCP-IP networking.  less

    asterisk sip network-administration 00 more less
    • $30.00 HOURLY RATE
    • 4.5
    • 17 HOURS
    • UKRAINE
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 5 TESTS
  • Asterisk/Vicidial/FreePBX/Elastix Expert | Technical Support

    Over the past 4 years, I have installed and configured a total of around 1,000 seats call center system with a maximum of 14 servers on one site using Vicidial on both standalone and multi-server setup. I have also … more

    Over the past 4 years, I have installed and configured a total of around 1,000 seats call center system with a maximum of 14 servers on one site using Vicidial on both standalone and multi-server setup. I have also also installed and configured IPPBX systems, VOIP systems, GSM gateway systems and asterisk-based systems using FreePBX and Elastix ranging from small to medium business enterprises including integration of IPPBX to a legacy PBX(PABX) and to CUCM. My core competencies lies in Asterisk, Vicidial, FreePBX, Elastix, Linux, SIP, IPPBX and PABX/CUCM integration, VOIP systems and GSM gateway systems. And I'm seeking opportunities to install, develop, configure and support call center systems and IPPBX systems from the ground up for you or your business. I have also experience in the following areas: MySQL, Windows Operating Systems, Microsoft Office applications, Apache, Basic to advance TCP/IP networking configuration, Basic to advance troubleshooting(system, software, hardware and networking), SDLC, UML Diagrams and OOP diagrams, FTP, remote desktop support, firewall, linux/shell scripting, Softphone(Eyebeam and Xlite) configuration, IP Phone(Polycom, Escene, Grandstream, Yealink, etc) configuration, Video Phone(Grandstream, Yealink, etc) configuration, Operator phone configuration, FXO/FXS gateway configuration and Sangoma/Digium/Atcom/Openvox card configuration(TDM/Analog, E1, E1R2, PRI/BRI).  less

    asterisk vicidial freepbx linux-system-administration sip mysql apache-administration 00 more less
    • $33.33 HOURLY RATE
    • 5.0
    • 32 HOURS
    • PHILIPPINES
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 1 TEST
  • Inovative Mobile VOIP, Social, Audio/Video Streaming Developer

    I am an innovative, extremely detail oriented and perfectionist Software Development Architect, with expert knowledge in VoIP, audio/video streaming and processing, messaging and social media. My a little over 8 years of experience in VoIP industry gave me a … more

    I am an innovative, extremely detail oriented and perfectionist Software Development Architect, with expert knowledge in VoIP, audio/video streaming and processing, messaging and social media. My a little over 8 years of experience in VoIP industry gave me a strong knowledge of the protocols, technologies and available solutions. 3 years of successful mobile applications development, architect and project management gave me confidence in creating robust and technologically challenging applications. I am passionate about developing robust, innovative and leading edge applications, getting increasingly challenging assignments and applying disruptive technologies. Looking for a work on technologically challenging projects (in an agile environment preferably), while offering my expert knowledge base, ability to learn quickly and apply new techniques. I usually bid slower than others, because of reading the full job description, trying to estimate all requirements, needed technologies and solutions.  less

    ios-development iphone-app-development ipad-app-development cocoa android-app-development java voice-over voip-software sip video-streaming 00 more less
    • $15.00 HOURLY RATE
    • 5.0
    • 25 HOURS
    • ARMENIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 1 TEST
  • VOIP/Asterisk/Web Developer/Senior Software Engineer/Database Designer

    Having keen interest and experience in desktop and window service application development. Worked on some major projects related to inventory systems, Linux VOIP applications and store operation management systems. Programmed own SMS Communication library and SMS service from scratch for … more

    Having keen interest and experience in desktop and window service application development. Worked on some major projects related to inventory systems, Linux VOIP applications and store operation management systems. Programmed own SMS Communication library and SMS service from scratch for my company that is now being used by company's clients. Worked on IVRs and speech recognition engines to develop a machine-to-machine calling and speech recognition system for my company. Having strong software and database design concepts. Main expertise are in C#, C++, ASP.NET, Java, JSP, HTML, VOIP, SQL Server, MySql Strong grip on reporting tools like Crystal Report and MS Access Reporting features. Have worked and developed for Windows, Unix/Linux and Apple Mac OS X operating systems. Interested in game and graphical simulation application development for fun.  less

    asterisk voip-software a2billing sip openerp-development openerp-administration asp.net-mvc website-development xml-web-services wcf 00 more less
    • $27.78 HOURLY RATE
    • 5.0
    • 4 HOURS
    • PAKISTAN
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 5 TESTS
  • Asterisk/Elastix/Freepbx/VoIP/Chan Dongle/Raspberry/Network specialist

    i am a VoIP specialist dealing with asterisk and voip billing based servers: freepbx elastix a2billing and Kamailio. i have collected much experience in installing and configuring VoIP servers and giving support for costumers during my last job position at … more

    i am a VoIP specialist dealing with asterisk and voip billing based servers: freepbx elastix a2billing and Kamailio. i have collected much experience in installing and configuring VoIP servers and giving support for costumers during my last job position at Voipmaroc and Nogafone. during my last jobs i was charged to deploy a voip call center based on elastix asterisk for DYARelmansour , a construction company leader in Morocco , and a call center ViciDial for EIGENVALUE based in Morocco and for many end user of IPBX appliances and customized IPbx installationsbased on asterisk. my diplomat at network engineering and Centos Linux experience helped me to devolope my skills in VOiP. i am ready to serve.  less

    asterisk elastix centos a2billing cisco-voip voip-administration automated-call-distribution freepbx sip 00 more less
    • $21.11 HOURLY RATE
    • 5.0
    • 129 HOURS
    • MOROCCO
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 4 TESTS
    ASSOCIATED WITH:
  • VoIP Expert / IP-PBX Specialist / Computer Networks / Linux

    A man interested in all things Computer and Data/Voice Networks related. Also a Linux and Virtualization enthusiast :) A strong supporter of Richard Stallman and Open Source software movement! You can visit and view my thoughts on: http://myciscojournal.blogspot … more

    A man interested in all things Computer and Data/Voice Networks related. Also a Linux and Virtualization enthusiast :) A strong supporter of Richard Stallman and Open Source software movement! You can visit and view my thoughts on: http://myciscojournal.blogspot.com Some Areas of my expertise: VoIP: -Genband Nextone - Expert -Sonus and NBS Solution - Expert -MVTS Pro and MVTS II - Expert -Acme Packet - Sound proficiency -Asterisk PBX: Full proficiency -Strong knowledge of SIP protocol and SIP routers/proxy servers/SS7 -OpenSER (Kamailio/OpenSips) -Load Balancing, Least Cost Routing, High Availability, NAT Traversal, Rate and billing systems, etc. -IVRs/Auto Attendant Development. -Wireshark - Expert Cisco Routing and Switching technologies. Centos/Fedora/Red Hat Enterprise Linux Various Billing solutions: -A2Billing: Full proficiency (configuration from scratch, customisation) -CDRTool (prepaid billing/accounting and sip tracing for OpenSIPS using RADIUS) -CDR-Stats (call detailed statistic/realtime stat for asterisk and freeswitch) - vBilling (billing for Freeswitch) Above all, a passionate technical writer, who enjoys writing down great tutorials in his free time :)  less

    cisco-routers cisco-voip sip linux-system-administration vicidial elastix trixbox a2billing freepbx asterisk 00 more less
    • $11.11 HOURLY RATE
    • 5.0
    • 1139 HOURS
    • MALAYSIA
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 5 TESTS
    ASSOCIATED WITH:
  • Experience Android Developer / Expert Windows Developer

    I am a software analyst and developer with more than 10 years of expertise in the area. I work with the following programming languages: Visual Foxpro, C#, VB .Net, PHP, HTML5, Javascript, Java, Delphi. I have developed applications for a … more

    I am a software analyst and developer with more than 10 years of expertise in the area. I work with the following programming languages: Visual Foxpro, C#, VB .Net, PHP, HTML5, Javascript, Java, Delphi. I have developed applications for a big range of purposes, from a regular invoicing app to an instant messaging communication for mobile devices. I have knowlegde of: CSS3, MySQL, MSSQL, Silverlight, MVC, WCF, WPF, LINQ, ADO.NET, XMPP, Openfire (XMPP Server), Ubuntu, Gentoo, Office, Scirra Contruct2 (Game Development), Unity3D (Game Development), GIMP, LibreOffice, Wordpress. Right now my main interest is to work on mobile applications, can it be via HTML5 or native languajes. If you have any questions, please send me a message and I will answer ASAP.  less

    android-app-development php c# javascript phpmyadmin ios-development iphone-app-development cocoa xmpp sip ado.net mysql linq-to-sql sql html5 agile-software-development hp-qtp hp-quality-center phonegap unity-3d 00 more less
    • $15.00 HOURLY RATE
    • 5.0
    • 14 HOURS
    • VENEZUELA
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 5 TESTS
    GROUPS:
  • VoIP,SIP,Asterisk,FreeSwitch,Opensips,Kamailio, Linux,MySQL,PHP,Apache

    Over the last 3.5 years, I have developed a wide range of IT solutions including VoIP, Web and Mobile development for small businesses and startup companies as well as for large companies. I have experience in VoIP, FreeSwitch, Opensips … more

    Over the last 3.5 years, I have developed a wide range of IT solutions including VoIP, Web and Mobile development for small businesses and startup companies as well as for large companies. I have experience in VoIP, FreeSwitch, Opensips, Kamailio, Asterisk, FreePBX, A2billing, Linux, Opensource Consulting, MySQL, PHP, Joomla, Android, asp.net-mvc, c#, .net-framwork etc. I have developed class4-class5 Soft Switches, SIP Proxy, FAX Servers, Fax2mail, Fax over IP, Messaging Servers, Session Border Controllers, IVR application, Web Applications and many others. My core competency lies in complete end to end IT solutions for VoIP, Web and Mobile technologies.  less

    voip-administration sip opensips asterisk freeswitch voip-software php radius android-app-development joomla mysql phpmyadmin website-development html html5 javascript jquery css css3 asp asp.net asp.net-mvc c# .net-framework 00 more less
    • $16.50 HOURLY RATE
    • 5.0
    • 386 HOURS
    • INDIA
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 6 TESTS
  • Software Engineer.

    I have extensive experience developing Software using Delphi,C#,C++, JAVA, PHP, MS SQL and MySQL. I also have many years of experience developing desktop applications with C/Win32, C++/MFC, COM, C#, VB 6.0, and VB.NET. I … more

    I have extensive experience developing Software using Delphi,C#,C++, JAVA, PHP, MS SQL and MySQL. I also have many years of experience developing desktop applications with C/Win32, C++/MFC, COM, C#, VB 6.0, and VB.NET. I am seeking new opportunities to create software application from scratch or to add advanced functionality to pre-existing softwares. I'm also interested in creating desktop and mobile applications in any language that your project requires. Various .NET related skills include: WCF, WPF, Workflow Foundation, MVC, ADO.NET Entity Framework, LINQ, LINQ to SQL, LINQ to XML, COM and Win32 interoperability. C++ skills: STL, templates, data structures, analysis of algorithms, interprocess communications, multithreading and parallelism with Windows Threads, Intel Threading Building Blocks and network programming with WinSock using TCP/IP and UDP. Mobile skills: Development of Windows and Android phone apps. Enterprise services development skills: asynchronous order processing with MSMQ and Windows Services, distributed transactions. Management/Finance Skills: Accounting, Inventory, Trading, Microsoft Navision, Metatrader 4, mql4 Miscellaneous skills: AJAX, jQuery, SVN, CVS, Git, Security/Hacking .. Preferred OS: Unix, OpenSource Mind .. Hobbies & Research : Automatism, Robotics, NAO, NXT 2.0 , V-REP, OpenCV ..  less

    c# .net-framework linux-system-administration java php perl delphi c++ microsoft-dynamics eclipse microsoft-visual-studio embedded-systems tcp-ip mysql network-security drupal elgg ffmpeg android-app-development html css ajax jquery javascript robotics opencv sip facebook-api twitter-api skype-development linkedin-api uml agile-software-development svn cvs git multithreaded-programming socket-programming mql4 sql 00 more less
    • $22.22 HOURLY RATE
    • 4.9
    • 111 HOURS
    • GERMANY
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 4 TESTS
    GROUPS:
  • Asterisk/voip/a2billing/freepbx expert

    My time is my value. So when you choosing me you can expect that job will be done in short terms and perfect. I not like to do something that not need be done, i prefer use developed components and … more

    My time is my value. So when you choosing me you can expect that job will be done in short terms and perfect. I not like to do something that not need be done, i prefer use developed components and solutions. That not mean i can't do development. I working with different programing tasks for last 26 years. yes, from 6 y.o. I live in it. So i prefer do something new&interesting; I can handle all tasks from linux administration/virtualization upto end-user web for voip. Only task i never do - graphical design part. That is not my field, better hire someone else for design. I have university degree, working with asterisk from start of this project. Have developing experience with freepbx/trixbox&a2billing. I am one of contributor of a2billing.org trunk. Also i can work as mysql/postgres DBA, database architect, has experience with following languages: Perl Python PHP C/C++ Javascript SQL Prolog/Lisp,Forth. In voip i can work with callweaver, asterisk, opensips, kamailio. Developed modules for freepbx, elastix, trixbox, a2billing.  less

    asterisk opensips a2billing freepbx virtualization linux-system-administration sql amazon-ec2 mysql sip trixbox elastix perl c++ python php css html xml windows-administration postgresql paypal-integration centos openvz xen-hypervisor 00 more less
    • $66.67 HOURLY RATE
    • 5.0
    • 416 HOURS
    • UKRAINE
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 6 TESTS
    ASSOCIATED WITH:
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