VoIP Consultants & Developers

Showing 4,074 freelancers

VoIP Consultants & Developers

Showing 4,074 freelancers

  • Network Engineer

    Fast learner, fast worker, quality contractor. Can administer the network, build scalable network infrastructure, implement various network services. I have experience in network design and security tuning, always available to discuss new opportunities. Excellence in troubleshooting networking problems Experience with … more

    Fast learner, fast worker, quality contractor. Can administer the network, build scalable network infrastructure, implement various network services. I have experience in network design and security tuning, always available to discuss new opportunities. Excellence in troubleshooting networking problems Experience with: Cisco 800 Series ISR, Cisco 1800/1900, Cisco 2800/2900 Series ISR, 3900 Series ISR Cisco Catalyst 2960, 3550, 3560, 3750, 4500, SMB-300 Cisco ASA and Cisco PIX firewalls FortiWeb web firewall Juniper Devices: SRX 240H-Poe, SRX 1400 and SRX 3400 firewalls, Juniper EX 2200, 4200 and 4500 switches Security Technology VPNs (Site-to-Site, IPSec, Remote Access, SSL, WebVPN, GET VPN, DMVPN, ezVPN), Cryptography, AAA, Radius, TACACS+, ACL, NBAR, IOS Firewall, IOS Security, 802.1x, CBAC, Cisco Secure ACS, Cisco VPN Client, Cisco MARS. Routing Static Routing, IGRP, EIGRP, OSPF, PBR, Route Filtering, Redistribution, Summarization Features & Services IOS Features, HSRP, IRDP, NAT, SNMP, SYSLOG, NTP, DHCP, DNS, HTTP Voice over IP Cisco Unified Communications Manager(CUCM), Call Manager Express (CME),  less

    cisco-routers cisco-ios vpn security 00 more less
    • $55.56 HOURLY RATE
    • 5.0
    • 81 HOURS
    • GEORGIA
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 5 TESTS
  • Expert Voice integration

    Work on Asterisk / Freeswitch like VOIP platform and integrate and develop with various technologies like Java / C/C++ / DOT NET and PHP, Python . Higher end skills includes socket programming , thread pool , Java Hibernate and NIO , Eclipse RCP , Python Django and … more

    Work on Asterisk / Freeswitch like VOIP platform and integrate and develop with various technologies like Java / C/C++ / DOT NET and PHP, Python . Higher end skills includes socket programming , thread pool , Java Hibernate and NIO , Eclipse RCP , Python Django and twister . The experience in setting up complex projects with development of Web Server , e-mail spider , using C as a web programming language has been the major achievements . Very high end database optimisation using memcached , voltdb . and use of event library with thread pools , reusable sockets on VOIP ( SIP ) and ISDN PRI .  less

    asterisk asp.net java javascript freeswitch mysql python eclipse hibernate django-framework c c++ wordpress php joomla magento 00 more less
    • $22.22 HOURLY RATE
    • 4.9
    • 506 HOURS
    • INDIA
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 3 TESTS
  • voip developer

    digium certified asterisk administrator.Working on asterisk nearly 5 years and developed. 1. voip billing application with asterisk and freeradius 2. call center application with gotutoidal,vicidial 3. work all on freepbx interfaces like elastix,trixbox,PBX in a Flash … more

    digium certified asterisk administrator.Working on asterisk nearly 5 years and developed. 1. voip billing application with asterisk and freeradius 2. call center application with gotutoidal,vicidial 3. work all on freepbx interfaces like elastix,trixbox,PBX in a Flash and AsteriskNow. 4. Develop voice chat applicatio. 5. confiugure pri's of ata,windstream,and cbeyond proiders and pakistan telecome also. 6. work also on Asterisk Digium cards with fxo and fxs channels. 7. A2billing application with customize new features. 8. IVR solution 9. can work on Perl and PHP AGI's 10. Linux system Administrator 12. MCITP certified 12. PHP web developer  less

    asterisk 00 more less
    • $17.78 HOURLY RATE
    • 4.5
    • 300 HOURS
    • PAKISTAN
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 2 TESTS
  • Software Engg

    - Web Application Developer, Database Administrator, and Software Project Manager in a wide variety of business applications. Particularly interested in client/server and relational database design using My SQL and MS-SQL Server. - Managing and configuring data replication Servers Using MySQL Server … more

    - Web Application Developer, Database Administrator, and Software Project Manager in a wide variety of business applications. Particularly interested in client/server and relational database design using My SQL and MS-SQL Server. - Managing and configuring data replication Servers Using MySQL Server - Network Manager with hands on experience of managing 150 node Network and managing and configuring network equipment including exchange server and Active Directory configuration - Implementing Network security using ISA Server and various opensource tools including astro , Microtik. - Configuring ,customization and managing Pridictive Dialers like Goautodial,elastix etc  less

    php mysql symfony doctrine-orm joomla wordpress opencart magento oscommerce jquery html ajax java python zencart phpmyadmin codeigniter javascript adobe-flash adobe-flex yii-framework 00 more less
    • $16.67 HOURLY RATE
    • 5.0
    • 46 HOURS
    • PAKISTAN
    • LAST ACTIVE
    • 1 PORTFOLIO ITEM
    • 2 TESTS
    GROUPS:
  • iPhone | Android | iOS 7

    Quality Guaranteed I have more than 7 years of experience in developing Mobile Application Desktop Applicaton, web applications using iPhone,Android, Window 7 Mobile,WIndow 8 Metro, asp.net (vb.net , C#) , SQL server 2005 , SQL server 2008 , AJAX ,.NET … more

    Quality Guaranteed I have more than 7 years of experience in developing Mobile Application Desktop Applicaton, web applications using iPhone,Android, Window 7 Mobile,WIndow 8 Metro, asp.net (vb.net , C#) , SQL server 2005 , SQL server 2008 , AJAX ,.NET Frame Work 2.0,.NET FrameWork 3.5 ,.NET FrameWork 4.0 , Telerik Web Controls ,Crystal Reports ,LINQ , MVC 3,MVC4 . Web Services , WCF,WPF , Silver Light . I would like to work on challenging innovative work and committed to provide quality services and try to satisfy the client about the skill ,quality ,communication and time frame .  less

    iphone-app-development ios-development android-app-development apple-xcode sqlite 00 more less
    • $22.22 HOURLY RATE
    • 4.9
    • 1429 HOURS
    • INDIA
    • LAST ACTIVE
    • 7 PORTFOLIO ITEMS
    • 4 TESTS
  • Skilled developer, network and Linux system administrator

    I have very extensive Linux knowledge and TCP/IP network administrator skills, including IP routing with OSPF and BGP experience, Web server setup and support, Apache load balancing, DNS (BIND) setup and configuration, Linux server security hardening, e-mail server setup … more

    I have very extensive Linux knowledge and TCP/IP network administrator skills, including IP routing with OSPF and BGP experience, Web server setup and support, Apache load balancing, DNS (BIND) setup and configuration, Linux server security hardening, e-mail server setup (Sendmail and exim), Perl programming, RADIUS knowledge, KVM virtualization, Astersik software PBX etc. I have serious understanding of PostgreSQL and MySQL database engines. Please take a look at my test results to find IT areas which I know best.  less

    python tcp-ip computer-networking linux-system-administration asterisk smtp exim zabbix security web-content-management perl ssh squid sendmail bash apache-administration bgp ospf wan dns postgresql 00 more less
    • $19.90 HOURLY RATE
    • 5.0
    • 35 HOURS
    • RUSSIA
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 11 TESTS
  • Energy Engr,Solar&Market Research,Tech.Writer,Online Marketing,Imp-Exp

    Over 3 years, I am experienced in Solar Power, Renewable Energy, Manufacturing Solar Panel, LED Light, Charge Controller, Solar System Design. Engineering Drawing like: Plan, Elevation, Section, Engineering topic specially renewable Energy: Solar Energy, System Design Web content writer, Engineering … more

    Over 3 years, I am experienced in Solar Power, Renewable Energy, Manufacturing Solar Panel, LED Light, Charge Controller, Solar System Design. Engineering Drawing like: Plan, Elevation, Section, Engineering topic specially renewable Energy: Solar Energy, System Design Web content writer, Engineering topic writer Solar Energy/Renewable Energy Clean Development Mechanism Certified Energy Manager Outsourcing Online Marketing Market Research Research Proposal Environmental Work Technical Writer Story writer Data entry Operator Administrator Different Letter & Application drafting MS Word, Excel, Power Point AutoCAD-2D and so on  less

    research-papers technical-support autodesk 2d-design content-writing data-entry data-mining sustainable-energy energy-engineering 00 more less
    • $22.22 HOURLY RATE
    • 4.2
    • 532 HOURS
    • BANGLADESH
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 1 TEST
  • A Software Programmer in C,C++,Unix, PERL, PYTHON and SYBASE

    Over the last 10 years, I have developed a wide range of telecom projects using C, C++ on Solaris platform. I also have experience in the following areas: Prtotocoal Stack Development, Script development using PERL & PYTHON,OOP, and software design … more

    Over the last 10 years, I have developed a wide range of telecom projects using C, C++ on Solaris platform. I also have experience in the following areas: Prtotocoal Stack Development, Script development using PERL & PYTHON,OOP, and software design and testing & well versed in agile development. My core competency lies in complete end-end management of a new project, and I am seeking opportunities to work on challenging project from the ground up for you or your business.  less

    c unix-system-administration unix-shell c++ perl python sap-sybase-adaptive-server-enterprise solaris-administration 00 more less
    • $11.50 HOURLY RATE
    • 5.0
    • 46 HOURS
    • INDIA
    • LAST ACTIVE
    • 6 PORTFOLIO ITEMS
    • 7 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
    • 37 HOURS
    • PHILIPPINES
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 1 TEST
  • PHP, MySQL, CodeIgniter, JavaScript, JQuery, AJAX, CSS

    I will use my full brain power to finish the project as soon as possible, and avoid wasting your time and money. I will always be honest, humble, polite and be patient to you. :) I'm here to make you … more

    I will use my full brain power to finish the project as soon as possible, and avoid wasting your time and money. I will always be honest, humble, polite and be patient to you. :) I'm here to make you happy with my work, because i enjoy my work. Thank you and GOD BLESS :) Reminder: I always give warranty to my work."  less

    css database-modeling graphics-programming javascript php html ajax mysql xml codeigniter jquery 00 more less
    • $13.33 HOURLY RATE
    • 4.6
    • 991 HOURS
    • PHILIPPINES
    • LAST ACTIVE
    • 11 PORTFOLIO ITEMS
    • 3 TESTS
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