Call Centre (Open Source) CRM (Call Blasting, Sip Trunks)

Looking to buy ready to use Call Centre CRM. Get back to me with demo. Complete documented installation and setup guide will also be required. I need you to develop some software for me. I would like this software to be developed for Linux using PHP, with Asterisk voip for call center. Solutions - Features - Call Features • Call Detail Records • Call Forward • Call Monitoring • Call Parking • Call Queuing • Call Recording • Call Transfer • Blind Transfer • Supervised Transfer • Call Waiting • Caller ID • Caller ID Blocking • Conference Bridging • Database Integration • Distinctive Ring • Do Not Disturb • Fax Transmit and Receive (3rd Party Package) • Interactive Voice Response (IVR) • Music On Hold • Music On Transfer • Overhead Paging • Remote Call Pickup • Remote Office Support • Roaming Extensions • Route by Caller ID • SMS Messaging • Spell / Say • TAPI - Dialling from Windows applications • Text-to-Speech • VoIP Gateways • Voicemail • Visual Indicator for Message Waiting • Voicemail to email • Web Voicemail Interface Mobile data collection to push data into CRM Create reports on the fly.