All Services Programming & Development VoIP Specialist $20/hr · Starting at $50 Asterisk, OpenSIPS, FreePBX, WebRTC, FreeSWITCH & Kamailio, ASTPP & A2Billing, Kannel Server & Jasmine SMS About $20/hr · Ongoing Download Resume Asterisk, OpenSIPS, FreePBX, WebRTC, FreeSWITCH & Kamailio, ASTPP & A2Billing, Kannel Server & Jasmine SMS Skills & Expertise A2BillingApacheAsteriskBashBillingFlaskFreepbxFreeSWITCHFTPGitHTTPIMAPIndustrialMongoDBMySQLNagiosNGINXOpenSIPSPerlPHPPythonSmtpTwitterVoIPWordPress 0 Reviews This Freelancer has not received any feedback. Browse Similar Freelance Experts PHP DevelopersHTTP ExpertsTwitter ExpertsWordPress ExpertsApache DevelopersFTP ExpertsMongoDB DevelopersPerl DevelopersA2Billing ExpertsVoIP ServicesNGINX ServicesMySQL DevelopersPython DevelopersBilling Services