Hi
I have more than 15 years of experience installing Call Centers in America (Latin and USA). I have installed several Open Source platforms (Asterisk, elastix, FreePBX, Freeswitch, Vicidial) and fixed problems that come with the source code. I have installations of more than 400 agents, integrations with own or open source CRM, SOAP, BD (Oracle, MySQL, SQL Server, AS400, Informix, DB2, AS400), REST.
Regards