PBX installation within the Vtiger 7.3 crm installation

Dear PBX developers, you must have prior experience specifically for PBX installation into vtiger system. it is clear that if you know what you doing than this task becomes to you only 2-3 hours of task max...therefore, apply for the position only if you have prior preparation for this task and able to prepare your proof of ability with providing usable condition of your previous works, with a video or with an actual URL link of your previous CRM work with connectivity credentials for an inspection. The task should complete in 1 day in normal circumstances, however, 3 days may an optimal duration for flexibility. Vtiger 7.3 is already installed on my local computer what you going to get: I will be providing ssh connection for the Centos7 in fully working condition... I will be providing root / ftp /mysql user and passwords. I will be providing RDP connection through windows server for visual logon into the centos 7 virtual machine over on windows server. vtiger and pbx servers can be on the same machine or it can be installed on to another virtual machine on the same windows server 2016 datacenter. As long as we got the pre-displayed solution at our agreement, I will be happy whether if you prefer to make an image installation. so if you have and prefer hyper v machine image deployment with all the necessary configurations, you are free to go ahead and make it easy for yourself... so I am open to for a reinstallation... ****** Preferably fresh vtiger 7.3, and the most advanced PBX server should all together on the same virtual centos 7. Besides that, PBX should fully be embedded into the vtiger, and all the resolutions for the user should available embedded into vtiger CRM web page ... **** + additional modules if aplicable. Thanks for each application in advance. Best Regards.