SIP Freelancers

Showing 57 freelancers

SIP Freelancers

Showing 57 freelancers

  • VoIP and Linux Engineer

    Hi. I'm a VoIP engineer, mostly using Asterisk and FreeSwitch. Later time have much expirience in OpenSIPS/Kamailio SIP Proxy family products. Also have a huge expirience in traditional telephony, also Video-Conferencing systems (Polycom, Tandberg). Excellence knowlege of SIP … more

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

    asterisk sip network-administration 00 more less
    • $30.00 HOURLY RATE
    • 4.5
    • 24 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
    • 37 HOURS
    • PHILIPPINES
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 1 TEST
  • VoIP PBX and Lync design and administration. Contract Center

    15+ years of Call Center and IT experience. Engineering and project management on Avaya 8700, 8300, G3, Gsi platforms, all Avaya remote gateways, as well as ISDN and SIP trunking with various carriers. Non-Avaya PBX experience also includes Cisco and … more

    15+ years of Call Center and IT experience. Engineering and project management on Avaya 8700, 8300, G3, Gsi platforms, all Avaya remote gateways, as well as ISDN and SIP trunking with various carriers. Non-Avaya PBX experience also includes Cisco and Asterisk, as well as Audiocodes media gateways and SBAs, as well as AcmePacket SBCs. Architecture, deployment and maintenance of Microsoft OCS 2007 R2 and Lync infrastructures. Strong focus placed on root cause analysis, incident documentation and effective end user communication in adherence to ITIL V3 standards.  less

    avaya asterisk microsoft-lync-server sip voip-software voip-administration 00 more less
    • $55.56 HOURLY RATE
    • 5.0
    • 3 HOURS
    • UNITED STATES
    • LAST ACTIVE
    • 0 PORTFOLIO ITEMS
    • 3 TESTS
  • 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
    • $16.67 HOURLY RATE
    • 5.0
    • 1182 HOURS
    • MALAYSIA
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 5 TESTS
    ASSOCIATED WITH:
  • Programmer (C/C++, Android (SDK, NDK), Java/J2ME/J2EE, Mobile VoIP)

    To help my clients meet their creative objectives relying on my sound software engineering and programming experience. I create consistent yet flexible software that stands out. I have 6+ year experience of software engineering and programming. I have good command over C/C++, Java, Android and other related technologies.

    android-app-development c java c++ uml opengl-es sip sql assembly-language mysql 00 more less
    • $16.67 HOURLY RATE
    • 5.0
    • 125 HOURS
    • PAKISTAN
    • LAST ACTIVE
    • 7 PORTFOLIO ITEMS
    • 9 TESTS
  • Asterisk/Elastix/Freepbx/VoIP/Chan Dongle/Raspberry/Network specialist

    i am a VoIP specialist dealing with Asterisk and voip billing Asterisk 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 … more

    i am a VoIP specialist dealing with Asterisk and voip billing Asterisk 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 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 installations based on asterisk. I have setup many Asterisk servers for many customers in Freelancing and Deployed many Gsmgateways and Asterisk based Gsmgateways. I have also installed and deployed Raspberry and Huawei Dongles as Cheap Gsmgateways . besides , i have Also setup some complex VoIP topologies for call Routing and Terminations via VPN . 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
    • 232 HOURS
    • MOROCCO
    • LAST ACTIVE
    • 2 PORTFOLIO ITEMS
    • 4 TESTS
    ASSOCIATED WITH:
  • Linux - LAMP - Windows - EC2 - S3 - Vyatta - Cisco - VPN

    My main skills are in systems administration (Linux/Unix and Windows) and large scale networking (Cisco/Juniper and Vyatta). I have over 10 years full time experience work with some of New Zealand's busiest networks. If it beeps I … more

    My main skills are in systems administration (Linux/Unix and Windows) and large scale networking (Cisco/Juniper and Vyatta). I have over 10 years full time experience work with some of New Zealand's busiest networks. If it beeps I can work with it! I have been involved with many complex projects mixing many technologies, I am extremely technically competent but at the same time fully capable of presenting my ideas to non-technical people in an easy to understand manner. I am able to think outside the box to deliver solutions that fit my customers needs rather than having to be spoon-fed ideas. Interview me today - you will not be disappointed. I specialise in : - Infrastructure Design - Security Design and Testing - Large Scale Networking - Large Web Deployments - Large Database Deployments - Large VoIP Deployments - Enterprise Grade VPN Solutions - All aspects of Linux/Unix/Windows design and deployment (from single server to 100 node web farms)  less

    linux-system-administration vpn bgp blackberry-app-development ospf sip oracle-database sql systems-development windows-administration lamp-administration php iis cisco-routers mysql apache-administration unix-shell cisco-ios cisco-asa juniper-routers junos firewalls tcp-ip dns network-security network-administration network-planning erp crm 00 more less
    • $94.44 HOURLY RATE
    • 4.6
    • 767 HOURS
    • NEW ZEALAND
    • LAST ACTIVE
    • 3 PORTFOLIO ITEMS
    • 18 TESTS
    GROUPS:
  • Asterisk/voip/a2billing/freepbx/kamailio 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
    • $67.77 HOURLY RATE
    • 5.0
    • 447 HOURS
    • UKRAINE
    • LAST ACTIVE
    • 5 PORTFOLIO ITEMS
    • 6 TESTS
    ASSOCIATED WITH:
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