All Services Programming & Development VOIP Dialer Development $40/hr · Starting at $5K We have implemented custom infrastructure using FreeSWITCH with Asterisk , Twilio API and used OpenSIPS with the number of popular CRM and build custom CRM to help to increase your productivity About $40/hr · Ongoing Download Resume We have implemented custom infrastructure using FreeSWITCH with Asterisk , Twilio API and used OpenSIPS with the number of popular CRM and build custom CRM to help to increase your productivity Skills & Expertise API DevelopmentAsteriskCRMCRM DevelopmentFreeSWITCHHelp DeskIT Infrastructure DesignOpenSIPSProductivity SoftwareSoftware DevelopmentTwilioTwilio APIVoIP 0 Reviews This Freelancer has not received any feedback. Browse Similar Freelance Experts Android App DevelopersSwift ProgrammersSDK Android DevelopersDesignersAPI DevelopersiOS App DevelopersMobile App DevelopersVoIP ServicesMySQL DevelopersSoftware DevelopersReactJS DevelopersJavaScript DevelopersHTML5 DevelopersWeb DesignersPHP DevelopersMicrosoft Access ProgrammersTwilio DevelopersWeb DevelopersWooCommerce DevelopersComputer ProgrammersApp DevelopersInternational Business ManagersBroadcasting JournalistsTwilio API Developers