Hi,
We are a team of experts working in Asterisk, VoIP, telephony since past 3 years and have done similar projects in the past. We can remotely give you demo of a current installation which has few requirements needed by you already configured by us.
Please check you inbox/PMB for details.
We are confident of completing your project successfully. Looking forward to get started on the project with you.
Thanks & Rgds,
Zenigent