Asterisk VOIP PBX

I need a php user interface for a customised freepbx and A2Billing combination that uses Asterisk on a Linux Operating system.? The system must be able to print itemised billing/invoicing and be tailored to the customers' pbx requirements in terms of call forwarding etc. The VOIP server/gateway may have fxs and fxo ports in the form of digium cards and must be able to make calls out through fxo or VOIP gateway? and terminate on fxs or VOIP handsets. ## Deliverables The program must monitor all calls made through the server and be able to extract reports such as destinations called, time of call, cost of call etc. A Boot server for Polycom 320 VOIP handset must be? part of the setup? so that the Boot server IP is put into the handset and it automatically downloads all settings specified by the FreePBX program.