A2Billing Freelancers

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A2Billing Job Cost Overview

Typical total cost of Upwork A2Billing projects based on completed and fixed-price jobs.

Upwork A2Billing Jobs Completed Quarterly

On average, 7 A2Billing projects are completed every quarter on Upwork.

7

Time to Complete Upwork A2Billing Jobs

Time needed to complete a A2Billing project on Upwork.

Average A2Billing Freelancer Feedback Score

A2Billing Upwork freelancers typically receive a client rating of 4.63.

4.63
Last updated: May 1, 2015

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  1. Mohamed Fahim

    Mohamed Fahim

    Expert in Asterisk, A2billing, Elastix and AWS, Cloud telephony

    Sri Lanka - Last active: 5 days ago - Tests: 4

    Over the last nine years I have actively engaged in designing and implementing VOIP telephony related infrastructure which involved in installation, provisioning and commissioning of highly complex VOIP solutions using Asterisk, A2billing, Elastix, Asternic, PIAF, Trixbox and Amazon AWS cloud telephony, Azure, HP Cloud, Rackspace and Digital Ocean Asterisk telephony installation. Provides call centre solutions using Asterisk, A2billing and Asternic. G729/G723 codec installation also Genband C3, Genband G9, Genband T800, Genband S3, Nextone VOIP Support.

    $16.00 /hr
    760 hours
    4.91
  2. Zhong W.

    Zhong W.

    Perl hacker and Voip Expert

    China - Last active: 13 days ago - Tests: 5

    I have more than 6 years working experience of voip industry. i am proficient in Asterisk, Freeswitch, Kamailio,Fusionpbx, A2Billing, Freepbx,Freeside and Linux Administrator. And i have planned and built dozen multi-tenant carrier pbx. i have been always supporting two muti-tenant carrier pbx systems based thirdlane and FusionPBX which both have more than 500 concurrent calls and 3000 registrations extensions. I am able to coding with C/C++, Perl, PHP, shell, sql and other programming language. I am steady, honest and hard-working. I am fond of innovation and pursuiting new techonologies. click here to know me more: https://click.2-call.me/apa1

    $27.78 /hr
    2,370 hours
    4.72
  3. Arsen S.

    Arsen S.

    VoIP Administration & Development

    Bulgaria - Last active: 1 day ago - Tests: 2 - Portfolio: 6

    I am focused in VoIP field only and I have been working here for more than 8 years. My Area of experiences: VoIP -Asterisk PBX: Full proficiency -FreeSWITCH: Full proficiency -Yate: Full proficiency -Strong knowlege of SIP protocol and SIP routers/proxy servers -OpenSER (Kamailio/OpenSips) -Load Balancing, Least Cost Routing, High Availability, NAT Traversal, Rate and billing systems, etc. -IVR and Auto Attendant Development -Secure VoIP: TLS, SRTP, ZRTP Full proficiency in free Billing/CDR 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) -cgRates (billing for Freeswitch) I provide: - Development of custom Billing and software solutions for Premium Rate Numbers business. - HA and Scalability solutions for existing VoIP networks. - Development and optimisation of VoIP networks/projects. - Ongoing support via request/ticket tracker system. - VoIP Security and Hacker protection solutions. I have successfully completed large amount of commercial installations of VoIP PBX servers. From SOHO to Enterprise deployment including integration of various VoIP solutions into existing network environment. I also have experience in building of secure "bastion" VoIP/Linux servers. Payment Terms: Minimal support package 5 hours. Short-term hourly support: $50 For long-term support please contact for price options. For sizable development projects please contact for price options. We charge upfront scoping (roadmapping meeting, flat-rate). Hourly based projects: -Current hourly rate is $50. Price per projects/feature: -Fixed price projects are calculated based on the hourly rate and expected task complexity. -For all fixed price projects complete project specification with clear tasks description is required -For all fix price projects work will be started only after payment has been es-crowed and both parties have agreed with working terms.

    $55.56 /hr
    126 hours
    5.00
  4. Abu Sufian

    Abu Sufian

    Linux,VoIP and Windows Server/Network Administrator

    Bangladesh - Last active: 1 month ago - Tests: 9 - Portfolio: 10

    I have over 6 years of hands on experiences in maintaining various servers mostly Microsoft & Linux based systems. Areas of my expertise are: 1. Asterisk, Elastix, Trixbox, FreePBX, Vicidial, A2Billing 2. Amazon EC2,S3,VPS,VMWare,ESXi,Xen,Open VZ 3. Mysql & MSSQL server 4. Windows based Servers, LAMP, Mail, DNS, Proxy Server 5. OpenVPN and L2TP/IPSec VPN 6. Webmin,Cpanel, WHM,Zpanel 7. Cisco,Mikrotik, DD-WRT,OpenWRT

    Groups: Microsoft Certified Professionals

    $8.00 /hr
    1,680 hours
    4.99
  5. Md. Riadul Islam

    Md. Riadul Islam

    Linux,Asterisk,DBA,Android,PHP,HTML5,MVC,C#.NET,PhoneGap 5+Years

    Bangladesh - Last active: 25 days ago - Tests: 16 - Portfolio: 5

    Working for last 5 years on Linux Server Management, DBA, C#,SQL,.NET , ASP , PHP, VOIP Soft switch and numerous criteria of computer science. Also build Mobile Apps for android, cross-platform apps. Strong working background on Database, Relational Algebra, Algorithms and Network Topology. Continuously looking for new technology and updates.

    Groups: Application Developers Alliance, AspDotNetStorefront

    $16.67 /hr
    2,639 hours
    5.00
  6. Tarik M.

    Tarik M.

    Asterisk, VoIP Expert, IP-PBX, linux, Server Admin, Firewall, OpenVPN

    Bangladesh - Last active: 20 days ago - Tests: 5 - Portfolio: 1

    Over 8+ years of IT experience in Server Systems and Network solutions, maintenance and support function. Expertise in Linux & Windows. I have in-depth knowledge of experienced Asterisk, A2billing, Freepbx / VoIP & Network Administrator procedure and documentation. * Asterisk PBX installation, support, advanced VoIP services development * Advanced Call Recording Solution using Asterisk * Hosted PBX applications (Asterisk, Freepbx, Elastix, A2billing, asterisknow) * Call Center applications (Vicidial) * VPN/OpenVpn installation and support Fully manage the installation, configuration and troubleshooting of Linux servers * Install and configure Web Servers and MySQL * Install and configure customer scripts and programs * Monitor performance to identify and resolve issues using a suite of systems and tools. * Troubleshoot and resolve network, system, hardware and software problems. * Achieve quick fixes and / or long-term solutions as needed. * Maintain 100% customer satisfaction through all available means I am also effective in digital and web graphics such as logo, banner, pdf forms and others related to arts and graphic designing. I am a multi-awarded Photographer. I am best in retouching photographs, making advertisements, retracing illustrations and making print materials such as flyers, brochures, posters, cd/dvd covers, packaging and labels, business cards and letterheads.

    $15.00 /hr
    0 hours
    5.00
  7. Nitish M.

    Nitish M. Agency Contractor

    Chief Executive Officer

    India - Last active: 06/14/2014 - Tests: 3 - Portfolio: 1

    It has been a great learning experience for me since the start of my career in year 2001. I started my career as a Web Developer working on Perl programming language with MySQL as a backend. Over the years, I not only got exposure to other Software & Web programming language & techniques, but also got a vast exposure to System Engineering, Network Engineering, It & Telecom domains. Today, I feel proud to say that I am just not a Developer, but an Architect, a Designer, a Implementor, an Enforcer, an Entrepreneur, a complete Engineer with so many years of experience who Loves to work on any technology related IT, Software, Web, Mobile, Systems, Network, Telecom, ICT, ITeS, ITSP, Data Center, and ISP domains.

    Associated with: Conjoinix Total Solutions

    $18.00 /hr
    0 hours
    5.00
  8. Dipesh S.

    Dipesh S. Agency Contractor

    Expert In Python/Django, Linux, PHP,ERP / CRM Implementation, EDI

    India - Last active: 1 day ago - Tests: 5 - Portfolio: 1

    Over the last 6 years, I have developed wide range of open source software’s and customization for start up companies and small businesses. I provide the complete (predefined and custom defined) open source solution for each and every type of business with customization according to their work/business. I Will work with my team. Let me describe my skills. OpenERP :- 1.My expertise are in the field of Open source ERP such as OpenERP, OpenBRAVO, Open EduCat ERP, FrontAccounting, ERPNext, Tryton and Other Well Known product in market with having 2-3 of work experience in the reptated organization . Work in such organization helped to understand the Business Process of various industries like Manufacturing ,Retail etc. 2.Implemented more than 20-30s OpenERPs at client server along with the INTEGRATION ,CUSTOMIZATION, MIGRATION, DEVELOPMENT and PROFESSIONAL TRAINING. 3.I have implemented the efforts with different flavors, proven track record of delivering creative and cost-effective solutions with High Availability and Linux maintenance/troubleshooting in Linux (CentOS, Redhat, Ubuntu, Debian, Fedora, Suse. etc),Solaris, Veitas, SAN in ECM and Hitachi, Volume Manager, like Veritas, and SVM, Windows Server, VOIP Solution and Database Management. EXPERIENCE :- Have 5 year of experience in OpenERP. LINUX :- Linux: LAMP system administration, HTTP/HTTPS, DNS,FTP, NFS, SMB, SMTP, SSH, NTP,iSCSI, , natd, ipfw, pf, iproute2, RIP, OSPF, BGP, Asterisk, FreePBX, SIP, H323, ffmpeg, Vlc Quagga, Adobe Media Player, Red5, FFMPEG, SSL, ACL. Database management like MySQL, MySQLCluster, PostgreSQL, Oracle 10g databases, Oracle Application Server. Web Server like Apache, Nignix, Tomcat, Squid, Proxy, VPN, DNS, Zimbra, Cluster, Monitoring tools and Alerting system such as Nagios, Cacti, MRTG, Zimbra, xdmcp, vnc, rdp. Virtual Environment like vmware, OpenVZ, KVM, XEN, QEMU. EXPERIENCE :- Have 5+ year of experience in LINUX. My core competency lies in complete end-end :- 1. Open Source Installation, Development, Customization and Support 2. SAN in ECM and Hitachi, and Volume Manager, like Veritas, and SVM 3. Tools/Packages/Software development in Java, Ruby on rails, Perl, python 4. Asterisk & Freepbx, A2Billing, Calling Card Solution and ivr solution. 5. Linux Server Security, Vulnerability Scanning and Penetration Testing. 6. Administrate VPS and dedicated Server. 7. Administrate LAMP (Linux, Apache, Mysql, PHP) Server. 8. Apache: Audit, performance and load balancing. 9. Automated MySQL database backup. 10. PHPMyAdmin MySQL database manager. 11. Setting up MySQL replication (Master-Slave,Master-Master,...). 12. Install and configure Mysql Cluster for Ubuntu,Redhat,Centos. 13. Mail Services like Postfix,dovecot, Sendmail etc. Also worked on Panelslike Plesk, webmin, Cpanel Directadmin etc. 14. Install and configure virtualmin (Migrate website,migrate databases,...). 15. Install and configure wordpress,drupal,theme,... (windows,linux,...). 16. Application Development in php, cms, Joomla, wordpress. 17. Web Performance, Security & penetration Testing. 18. Expert in Stock Mining and data mining and familiar with the following Concepts/algorithms Noise/Outier Removal,Signal processing, Data stream processing, Classification, Clustering Prediction. WEB SCRAPING :- 1. I have high skills in Web Scraping and have a lot of good libraries in PYTHON. BeautifulSoup module is good for parsing HTML/XML files and its possible to extract everything from the web pages. Also urlib2 is good module for fetching the web pages. Our libraries is able to bypass the security issues such as intrusion detection systems (by changing the outgoing IPs, handling sessions, user/pass logins) and also use multiple web/socks4/socks5 proxies. 2. MOST IMPORTANT FEATURE of my skills is that i can give you unlimited number of proxies.i can develop a program that is able to change its outgoing IP address without using web proxies PYTHON / PHP :- 1.10 + year of experience in PYTHON,PHP, HTML, JavaScript ,MySQL. 2.Familiar with all kind of algorithms in Pattern Recognition and Machine Learning fields. 3.Expert in Artificial Intelligence ,Stock Mining and data mining and familiar with the following Concepts/algorithms Noise/Outier Removal,Signal processing, Data stream processing, Classification, Clustering Prediction. 4.Have good experience in FLASK and DJANGO. Thanks & Regards, Dipesh Sahni

    Groups: Crossrider, PHPFox

    Associated with: Genpex IT Solutions, Dipesh Sahni Agency

    $27.78 /hr
    1,250 hours
    4.83
  9. Noman Ahmed

    Noman Ahmed Agency Contractor

    9+ years Server & Network Administrator

    Bangladesh - Last active: 1 day ago - Tests: 10 - Portfolio: 8

    Client's Satisfaction, Quick & efficient Solution Delivery guranteed. Profile: Experience of over 9 plus years in the field of Server/Network Administration with ISP, Corporate IT management. Serving as freelancer here over 1 year. - Platforms : Red Hat Linux, WINNT, VM Administration - Cloud : Amazon EC2-VPC, Loadbalancing, RDS, Route 53, S3, SNS, VPN,Firewall,Server administration, Rackspace - DBMS technologies : MySql - iis/apache/tomcat, Subversion,LAMP, - WHM / Cpanel build and administration in all sort of server platforms. - Website maintenance, migration, loadbalancing, DNS, SSL, Web Security - Email Server implementation, whitelisting, maintenance. - Jira, Confluence,Redmine administration, implementation & customization. - Mikrotik Router OS administration with ISP / WISP and total network implementation. - Asterisk / FreePBX / A2billing system building and administration - 24 X 7 availability for support & critical issues. - Contact: skype: nomanuahmed, Email: noman.u.ahmed@gmail.com

    Associated with: technocrat associate

    $11.11 /hr
    4,672 hours
    4.89