Asterisk proxmox a2billing opensips multi tenant system

Project Background ------------------- Current infrastructure multiple high power servers running proxmox -host --vm-firewall --vm-opensips(dmz) -host --vm-billing --vm-application web LAMP --tftp server LAMP -host --vm-asterisk --vm-asterisk --vm-asterisk .. .. .. .. -host --vm-asterisk --vm-asterisk .. and so on -remote host (static Ip outside datacenter) -host proxmox --vm-proxy --vm-asterisk the remote host is part of the cluster for managment. The project scope is: ---------------------- 1.) install + configure opensips or other as sip register proxy front and then register with corespdoning host/vm within network. 1a.) configure proxy or additional proxy as termination / LCR signaling switch 1b.) need gui managment 2.) install + configure a2billing to read cdr's and bill monthly recurring subscriptions to end clients business tenants or home users. 2a.) customize a2billing to look like existing compnay website 2b.) paypal api for billing integration 3.) design application web (mimick freepbx) that sits ONLY on web to access all sub hosts and vm's local or remote. 3a.) design/look to look like existing company website. 3b.) single sign on page. Tenant (host name interpreter/lookup) login/admin name (admin for vm), password. 3c.) multiple user interface (vm / tenant admin, operateor / manager, end user) 4.) customize script for auto install of new vm's to mimick all settings. 5.) Central TFTP managment web gui to manage vm/tenant phones from one location. extension lookup from vm / tenant 'drop down' box. Please Note: When bidding on project, please make sure you have understanding of asterisk, network configuration, opensips and a2billing. If sending PM, please include a statement or diagram that you understand what we are looking to do, OR alternate method you have already implemented. Thank you,